Updated on 2021/12/19

写真a

 
MORI Hiroki
 
Organization
Research Institute for Interdisciplinary Science Assistant Professor
Position
Assistant Professor
External link

Degree

  • 博士 (工学) ( 2013.3   広島大学 )

Research Interests

  • Organic Semiconductor

  • 有機半導体

Research Areas

  • Nanotechnology/Materials / Functional solid state chemistry

  • Nanotechnology/Materials / Synthetic organic chemistry

  • Nanotechnology/Materials / Polymer materials

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment

Education

  • Hiroshima University   工学研究科   応用化学専攻 博士課程後期

    2010.4 - 2013.3

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    Country: Japan

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  • 広島大学大学院   工学研究科   物質化学システム専攻 博士課程前期

    2008.4 - 2010.3

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    Country: Japan

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  • Hiroshima University   工学部   第3類応用化学課程

    2006.4 - 2008.3

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    Country: Japan

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Research History

  • Okayama University   Research Institute for Interdisciplinary Science   Assistant Professor

    2016.4

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    Country:Japan

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  • - 岡山大学自然科学研究科地球物質科学専攻 助教

    2015.9 - 2016.3

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  • 岡山大学自然科学研究科 助教 (特別契約職員)

    2013.4 - 2015.8

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Professional Memberships

 

Papers

  • Development of semiconducting polymers based on a novel heteropolycyclic aromatic framework

    Hiroki Mori

    Polymer Journal   53 ( 9 )   975 - 987   2021.9

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1038/s41428-021-00497-9

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    Other Link: https://www.nature.com/articles/s41428-021-00497-9

  • Formation of trans-Poly(thienylenevinylene) Thin Films by Solid-State Thermal Isomerization Reviewed

    Masayuki Wakioka, Natsumi Yamashita, Hiroki Mori, Richard Murdey, Takafumi Shimoaka, Nobutaka Shioya, Atsushi Wakamiya, Yasushi Nishihara, Takeshi Hasegawa, Fumiyuki Ozawa

    Chemistry of Materials   33 ( 14 )   5631 - 5638   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.chemmater.1c01016

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  • Synthesis and Physicochemical Properties of 2,7-Disubstituted Phenanthro[2,1-b:7,8-b’]dithiophenes Reviewed

    Zhenfei Ji, Zeliang Cheng, Hiroki Mori, Yasushi Nishihara

    Molecules   25 ( 17 )   3842 - 3842   2020.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    We report the design, synthesis, and physicochemical properties of an array of phenanthro[2,1-b:7,8-b’]dithiophene (PDT-2) derivatives by introducing five types of alkyl (CnH2n+1; n = 8, 10, 12, 13, and 14) or two types of decylthienyl groups at 2,7-positions of the PDT-2 core. Systematic investigation revealed that the alkyl length and the type of side chains have a great effect on the physicochemical properties. For alkylated PDT-2, the solubility was gradually decreased as the chain length was increased. For instance, C8-PDT-2 exhibited the highest solubility (5.0 g/L) in chloroform. Additionally, substitution with 5-decylthienyl groups showed poor solubility in both chloroform and toluene, whereas PDT-2 with 4-decylthienyl groups resulted in higher solubility. Furthermore, UV-vis absorption of PDT-2 derivatives substituted by decylthienyl groups showed a redshift, indicating the extension of their π-conjugation length. This work reveals that modification of the conjugated core by alkyl or decylthienyl side chains may be an efficient strategy by which to change the physicochemical properties, which might lead to the development of high-performance organic semiconductors.

    DOI: 10.3390/molecules25173842

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  • Synthesis of Dinaphtho[2,3-d:2’,3’-d’]anthra[1,2-b:5,6-b’]dithiophene (DNADT) Derivatives: Effect of Alkyl Chains on Transistor Properties Reviewed

    Takumi Ishida, Yuta Sawanaka, Ryota Toyama, Zhenfei Ji, Hiroki Mori, Yasushi Nishihara

    International Journal of Molecular Sciences   21 ( 7 )   2447 - 2447   2020.4

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    Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    To investigate organic field-effect transistor (OFET) properties, a new thienoacene-type molecule, 4,14-dihexyldinaphtho[2,3-d:2’,3’-d’]anthra[1,2-b:5,6-b’]dithiophene (C6-DNADT), consisting of π-conjugated nine aromatic rings and two hexyl chains along the longitudinal molecular axis has been successfully synthesized by sequential reactions, including Negishi coupling, epoxidation, and cycloaromatization. The fabricated OFET using thin films of C6-DNADT exhibited p-channel FET properties with field-effect mobilities (µ) of up to 2.6 × 10−2 cm2 V−1 s−1, which is ca. three times lower than that of the parent DNADT molecule (8.5 × 10−2 cm2 V−1 s−1). Although this result implies that the installation of relatively short alkyl chains into the DNADT core is not suitable for transistor application, the origins for the FET performance obtained in this work is fully discussed, based on theoretical calculations and solid-state structure of C6-DNADT by grazing incidence wide-angle X-ray scattering (GIWAXS) and atomic force microscopy (AFM) analyses. The results obtained in this study disclose the effect of alkyl chains introduced onto the molecule on transistor characteristics.

    DOI: 10.3390/ijms21072447

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  • Transistor Properties of Semiconducting Polymers Based on Vinylene-bridged Difluorobenzo[c][1,2,5]thiadiazole (FBTzE) Reviewed

    Asanuma Yuya, Mori Hiroki, Nishihara Yasushi

    CHEMISTRY LETTERS   48 ( 9 )   1029 - 1031   2019.9

  • Vinylene-bridged difluorobenzo[c][1,2,5]-thiadiazole (FBTzE): a new electron-deficient building block for high-performance semiconducting polymers in organic electronics Reviewed

    Asanuma Yuya, Mori Hiroki, Takahashi Ryosuke, Nishihara Yasushi

    JOURNAL OF MATERIALS CHEMISTRY C   7 ( 4 )   905 - 916   2019.1

  • Synthesis and Physicochemical Properties of Dibenzo[2,3-d:2 ',3 '-d ']anthra[1,2-b:5,6-b ']dithiophene (DBADT) and Its Derivatives: Effect of Substituents on Their Molecular Orientation and Transistor Properties Reviewed

    Hyodo Keita, Nishinaga Shuhei, Sawanaka Yuta, Ishida Takumi, Mori Hiroki, Nishihara Yasushi

    JOURNAL OF ORGANIC CHEMISTRY   84 ( 2 )   698 - 709   2019.1

  • Bis[1]benzothieno[5,4-d:5¤,4¤-d¤]benzo[1,2-b:4,5-b¤]dithiophene Derivatives: Synthesis and effect of sulfur positions on their transistor properties Reviewed

    Shuhei Nishinaga, Masato Mitani, Hiroki Mori, Toshihiro Okamoto, Jun Takeya, Yasushi Nishihara

    Bulletin of the Chemical Society of Japan   92 ( 6 )   1107 - 1116   2019

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    Publishing type:Research paper (scientific journal)  

    © 2019 The Chemical Society of Japan. Bis[1]benzothieno[5,4-d:5¤,4¤-d¤]benzo[1,2-b:4,5-b¤]dithiophene (BBTBDT-2) and its phenyl-substituted derivative were successfully synthesized and characterized. From DFT calculations, highest occupied molecular orbitals (HOMOs) of both compounds are well delocalized and large orbital coefficients exist on sulfur atoms. Single-crystal X-ray analysis revealed that BBTBDT-2 derivatives formed herringbone structures in the solid state. In particular, BBTBDT-2 formed a layer-by-layer structure with effective 2D charge-carrier transporting capability. The fabricated OFETs based on BBTBDT-2 gave mobility up to 0.49 cm2 V11 s11 in the vacuum-deposited thin films, which is the highest value among BBTBDT derivatives including our previously reported syn-counterparts. We have also clarified a detailed structureproperty relationship of sulfur positions and phenyl substituents as indicated by theoretical calculation, GIWAXS, and AFM analyses.

    DOI: 10.1246/bcsj.20180358

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  • Development of a Phenanthrodithiophene-Difluorobenzoxadiazole Copolymer Exhibiting High Open-Circuit Voltage in Organic Solar Cells Reviewed

    Hiroki Mori, Ryosuke Takahashi, Yasushi Nishihara

    J. Poly. Sci. Part A: Pol. Chem.   56   2646 - 2655   2018.10

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  • Synthesis and Transistor Characteristics of Dinaphtho[2,3-d:2’,3’-d’]anthra[1,2-b:5,6-b’]dithiophene (DNADT) Reviewed

    Shuhei Nishinaga, Yuta Sawanaka, Ryota Toyama, Takumi Ishida, Hiroki Mori, Yasushi Nishihara

    Chem. Lett.   47   1409 - 1411   2018.9

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  • Effect of substitution positions of alkyl side chains in phenanthrodithiophene–isoindigo copolymers: The enhancement of crystallinity and control of molecular orders

    Hiroki Mori, Shuto Hara, Ryota Toyama, Yuya Asanuma, Ryosuke Takahashi, Shuhei Nishinaga, Yasushi Nishihara

    Journal of Polymer Science, Part A: Polymer Chemistry   56 ( 15 )   1757 - 1767   2018.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:John Wiley and Sons Inc.  

    The synthesis, characterization, and solar cell application of newly developed two semiconducting polymers containing phenanthro[1,2-b:8,7-b′]dithiophene (PDT) and an isoindigo (IID) unit are described. In addition, a relationship between substitution position of side chains and molecular weights of the polymers and their solar cell performance are also discussed. Because of the installation of alkyl side chains onto sterically less hindered positions, PDT-IID copolymers 12OD-2 and 8OD-2 have stronger intermolecular interaction than that of the previously reported copolymer 12OD. In low-Mn polymers 12OD-2 and 8OD-2 formed high-crystalline thin film with higher face-on ratio than that of 12OD, but their unsuitable large-scale phase separation suppressed their efficient photocurrent generation, leading to poor PCE of 2–3%. However, the surface morphology of 12OD-2 and 8OD-2 blended films are drastically improved by increasing Mn, which leads to the enhancement of Jsc and higher PCE of up to 4.3%. However, high-Mn polymers 12OD-2 and 8OD-2 formed high-crystalline film with about 10–15% lower face-on ratio than that of high-Mn polymer 12OD, leading to poor hole transporting ability, and thus lower Jsc and PCE. From this result, too much strong intermolecular interaction promotes the formation of unsuitable edge-on orientation in blended films. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1757–1767.

    DOI: 10.1002/pola.29058

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  • Low-bandgap semiconducting polymers based on sulfur-containing phenacene-type molecules for transistor and solar cell applications

    Hiroki Mori, Yasushi Nishihara

    Polymer Journal   50 ( 8 )   1 - 11   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Nature Publishing Group  

    The incorporation of a highly extended π-electron system into a polymer backbone is an effective strategy to develop high-performance donor–acceptor (D–A) polymers suitable for organic electronics because this strategy can facilitate a dense π-π stacking structure, leading to efficient carrier transport. With this in mind, we developed phenanthro[1,2-b:8,7-b′]dithiophene (PDT) because this new phenacene-type molecule has a highly crystalline nature, deep HOMO level, and high hole mobility, which are characteristics known to be suitable for a donor unit in high-performance D–A polymers. In this focus review, we report recent progress in PDT-containing D-A polymers combined with various strong acceptor units. Incorporation of PDT into a polymer backbone results in deep HOMO energy levels of −5.4~−5.5 eV, strong aggregation, and a dense packing structure with a short π-stacking distance of 3.5~3.6 Å. PDT-based polymers with appropriate alkyl side chains exhibit high hole mobilities of up to 0.18 cm2 V−1 s−1 in organic field-effect transistor (OFET) devices due to their tendency to form highly ordered edge-on structures. Furthermore, we can adjust their level of molecular orientation from edge-on to face-on by increasing their molecular weight, leading to a high power conversion efficiency of over 6% in polymer solar cell (PSC) applications. These results demonstrate that PDT is a good candidate as a high-performance building block in D-A polymers.

    DOI: 10.1038/s41428-018-0072-4

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  • Synthesis and Transistor Application of Bis[1]benzothieno[6,7- d:6′,7′- d′]benzo[1,2- b:4,5- b′]dithiophenes

    Shuhei Nishinaga, Hiroki Mori, Yasushi Nishihara

    Journal of Organic Chemistry   83 ( 10 )   5506 - 5515   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society  

    Four bis[1]benzothieno[6,7-d:6′,7′-d′]benzo[1,2-b:4,5-b′]dithiophene (BBTBDT) derivatives bearing substituents on the molecular long axis were synthesized, and their transistor performance was evaluated. Among the obtained compounds, OFET devices based on the 2,9-diphenyl-substituted derivative (1d) on a β-PTS-modified Si/SiO2 substrate yielded the best morphological and crystalline structures, resulting in the highest hole mobility, as high as 0.16 cm2 V-1 s-1, and a low threshold voltage of -8 V. In the solid state, 1d formed a highly ordered and crystalline edge-on structure, which facilitated effective carrier transport. The detailed structure-property relationships were also disclosed by GIWAXS analysis, atomic force microscopy measurements, and theoretical calculations.

    DOI: 10.1021/acs.joc.8b00483

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  • Phenanthrodithiophene (PDT)-Difluorobenzothiadiazole (DFBT) Copolymers: Effect on Molecular Orientation and Solar Cell Performance of Alkyl Substitution onto a PDT Core

    Hiroki Mori, Ryosuke Takahashi, Keita Hyodo, Shuhei Nishinaga, Yuta Sawanaka, Yasushi Nishihara

    Macromolecules   51 ( 4 )   1357 - 1369   2018.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society  

    Synthesis, characterization, and solar cell application of three 4,7-dialkylated phenanthro[1,2-b:8,7-b′]dithiophene (PDT)-difluorobenzothiadiazole (DFBT copolymers (P1-P3) with different linear alkyl side chains to improve solubility, molecular weight, and molecular orientation are described. The utilization of Ir-catalyzed direct borylation and sequential functionalization can selectively afford the target 4,7-dialkylated PDT as the monomers. Migita-Kosugi-Stille coupling in the presence of CuI can accelerate polymerization to afford high-molecular-weight polymers along with their improved solubility. The effect of alkyl substitution at the 4,7-positions on the electronic structure of PDT-DFBT copolymers is negligible. By installation of additional alkyl chains at the 4,7-positions of PDT, the synthesized polymers P1-P3 have lower intermolecular interaction than that of nonalkylated P0, but they still maintained aggregation behavior in solution. In addition, they formed a favorable face-on orientation with a short π-stacking distance of 3.6 Å, which can enhance their carrier transport ability, resulting in high Jsc and FF. As a result, their fabricated solar cells reached a PCE exceeding 6%, which are about 1.7-fold higher than that of P0. Comparison of alkyl side chain length at the 4,7-positions of PDT revealed that all polymers formed a predominantly face-on orientation and have a similar face-on ratio in blended films, but their crystallinity was decreased as the carbon chains at the 4,7-positions of PDT became shorter. On the other hand, the polymers with short alkyl side chains tended to have low surface roughness and small domain size of active layers, which is an ideal phase separation structure for high-performance PSCs. From these results, it could be seen that the polymers have a trade-off relationship between their domain size and crystallinity, but the impact of alkyl side chain length on their photovoltaic properties is rather small. Thus, the construction of face-on orientation is highly important to achieve a high PCE. Among three polymers, the P3/PC61BM-based solar cell with an optimal nanoscale phase separation structure with bicontinuous domain showed the highest PCE of up to 6.6%.

    DOI: 10.1021/acs.macromol.7b02734

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  • Synthesis of a 1,2-Dithienylethene-Containing Donor-Acceptor Polymer via Palladium-Catalyzed Direct Arylation Polymerization (DArP)

    Masayuki Wakioka, Natsumi Yamashita, Hiroki Mori, Yasushi Nishihara, Fumiyuki Ozawa

    Molecules   23 ( 4 )   981 - 990   2018

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    This paper reports the synthesis of D-A polymers containing 1,2-dithienylethene (DTE) units via palladium-catalyzed direct arylation polymerization (DArP). The reaction of dibromoisoindigo (1-Br) and DTE (2-H), in the presence of Pd2(dba)3·CHCl3 (0.5 mol%), P(2-MeOC6H4)3 (L1) (2 mol%), pivalic acid (1 equiv) as catalyst precursors, and Cs2CO3 (3 equiv) as a base affords poly(1-alt-2) with a high molecular weight (Mn up to 44,900). Although, it has been known that monomers, with plural C–H bonds, tend to form insoluble materials via direct arylation at undesirable C–H positions
    the reaction of 1-Br and 2-H cleanly proceeds without insolubilization. The resulting polymer has a well-controlled structure and exhibits good charge transfer characteristics in an organic field-effect transistor (OFET), compared to the polymer produced by Migita–Kosugi–Stille cross-coupling polymerization. The DArP product displays an ideal linear relationship in the current–voltage curve, whereas the Migita–Kosugi–Stille product shows a VG-dependent change in the charge mobility.

    DOI: 10.3390/molecules23040981

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  • Efficient Synthesis and Properties of [1]Benzothieno[3,2-b]thieno[2,3-d]furans and [1]Benzothieno[3,2-b]thieno[2,3-d]thiophenes

    Yuji Kurimoto, Koichi Mitsudo, Hiroki Mandai, Atsushi Wakamiya, Yasujiro Murata, Hiroki Mori, Yasushi Nishihara, Seiji Suga

    ASIAN JOURNAL OF ORGANIC CHEMISTRY   7 ( 8 )   1635 - 1641   2018

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY-V C H VERLAG GMBH  

    Efficient syntheses of benzodithienofuran (BDTF; [1]benzothieno[3,2-b]thieno[2,3-d]furan) and benzodithienothiophene (BDTT; [1]benzothieno[3,2-b]thieno[2,3-d]thiophene) were achieved by the combination of an addition-elimination reaction, reduction, and Pd-catalyzed dehydrogenative cyclization. We also achieved the synthesis of pi-ex- tended BDTF and BDTT derivatives through the use of coupling reactions. The detailed physical properties of these compounds were investigated. The newly synthesized BDTFs exhibited strong fluorescence compared with BDTTs. 2,2'-Bis([1]benzothieno[3,2-b]thieno[2,3-d]furan) (BBTTF) exhibited p-type organic field-effect transistor (OFET) properties.

    DOI: 10.1002/ajoc.201800270

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  • Alkoxy-Substituted Anthra[1,2-c:5,6-c ']bis([1,2,5]thiadiazole) (ATz): A New Electron-Acceptor Unit in the Semiconducting Polymers for Organic Electronics

    Hiroki Mori, Shuhei Nishinaga, Ryosuke Takahashi, Yasushi Nishihara

    Macromolecules   51 ( 14 )   5473 - 5484   2018

  • Solar Cell Performance of Phenanthrodithiophene-Isoindigo Copolymers Depends on Their Thin-Film Structure and Molecular Weight

    Hiroki Mori, Shuto Hara, Shuhei Nishinaga, Yasushi Nishihara

    MACROMOLECULES   50 ( 12 )   4639 - 4648   2017.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER CHEMICAL SOC  

    Phenanthro[1,2-b:8,7-b']dithiophene (PDT)isoindigo (IID)-based polymers 12OD (L) and 12OD (H) with a different molecular weight were synthesized and characterized. By using further purified PDT and IID monomers, the high-molecular-weight polymer 12OD (H) with number-average molecular weight (M-n) over 50 kDa was obtained. Both 12OD (L) and 12OD (H) polymers have the same energy gap and highest occupied molecular orbital (HOMO) energy levels, indicating that the influence of molecular weight on their electronic structure is negligible, although 12OD (H) has stronger aggregation behavior than 12OD (L). 12OD (H)-based solar cells fabricated by using optimal solvent and additives showed an increased short-circuit current density (J(sc)) with same open-circuit voltage (V-oc) and fill factor (FF), resulting in a significantly improved power conversion efficiency (PCE) of up to 6.1%, which is approximately 70% higher than that of the 12OD (L)-based cell (3.5%). This result is due to the different molecular orientation caused by the higher molecular weight. Grazing incidence wide-angle X-ray scattering (GIWAXS) analyses revealed that the blended film of 12OD (H)/[6,6]-phenyl-C-61-butyric acid methyl ester (PC61BM) formed a face-on orientation with a long-range ordered structure, while a low crystalline edge-on structure was observed in the blended film of 12OD (L)/PC61BM. Such high crystalline and favorable molecular orientation could promote light harvesting efficiency and hole transporting ability, resulting in high J(sc) and thus an excellent PCE. From the detailed GIWAXS analysis, the orientation change of 12OD (H) was induced by the addition of PC61BM. This result suggests that the strong aggregation ability of 12OD (H) can drive crystallization and favors active interaction with PC61BM to form a face-on orientation. In this study, the increase in molecular weight can improve not only the thin-film structure such as crystallinity and phase separation structure but also the molecular orientation in the PDT-based polymer system.

    DOI: 10.1021/acs.macromol.7b00778

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  • Synthesis and Physicochemical Properties of Piceno[4,3-b:9,10-b′]dithiophene Derivatives and Their Application in Organic Field-Effect Transistors

    Keita Hyodo, Ryota Toyama, Hiroki Mori, Yasushi Nishihara

    ACS Omega   2 ( 1 )   308 - 315   2017.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society  

    Efficient synthesis and characterization of several piceno[4,3-b:9,10-b′]dithiophene (PiDT) derivatives by Negishi coupling, epoxidation, and Lewis acid-catalyzed cycloaromatization sequences and their potential utility in organic field-effect transistors (OFETs) have been reported. PiDT derivatives, with extended π-electron systems, showed high air stability due to their deep highest occupied molecular orbital energy levels (around -5.6 eV). OFET devices based on 2,11-dioctylated PiDT (C8-PiDT) showed excellent hole mobility, as high as 2.36 cm2 V-1 s-1. Their structure-property relationships were investigated by X-ray diffraction and atomic force microscopy.

    DOI: 10.1021/acsomega.7b00015

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  • Bis[1]benzothieno[2,3-d:2 ',3 '-d ']anthra[1,2-b:5,6-b ']dithiophene: synthesis, characterization, and application to organic field-effect transistors

    Keita Hyodo, Hideki Hagiwara, Ryota Toyama, Hiroki Mori, Shin-ichi Soga, Yasushi Nishihara

    RSC ADVANCES   7 ( 10 )   6089 - 6092   2017

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ROYAL SOC CHEMISTRY  

    We report the straightforward synthetic method and characterization of bis[1]benzothieno[2,3-d:2',3'-d']anthra[1,2-b:5,6-b']dithiophene (BBTADT) having nine aromatic rings fused without solubilizing groups. The highest mobility of fabricated OFETs utilizing BBTADT exhibited 2.7 x 10(-2) cm(2) V-1 s(-1) in polycrystalline films formed by vapor deposition, depending on the annealing temperatures of a substrate.

    DOI: 10.1039/c6ra27455b

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  • Transistor Properties of 2,7-Dialkyl-Substituted Phenanthro[2,1-b:7,8-b '] dithiophene

    Yoshihiro Kubozono, Keita Hyodo, Shino Hamao, Yuma Shimo, Hiroki Mori, Yasushi Nishihara

    Scientific Reports   6   38535-1-38535-9   2016.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:NATURE PUBLISHING GROUP  

    A new phenacene-type molecule with five fused aromatic rings was synthesized: 2,7-didodecylphenanthro[2,1-b: 7,8-b'] dithiophene ((C12H25)(2)-i-PDT), with two terminal thiophene rings. Field-effect transistors (FETs) using thin films of this molecule were fabricated using various gate dielectrics, showing p-channel normally-off FET properties with field-effect mobilities (mu) greater than 1cm(2) V-1 s(-1). The highest mu value in the thin-film FETs fabricated in this study was 5.4 cm(2) V-1 s(-1), when a 150 nm-thick ZrO2 gate dielectric was used. This implies that (C12H25)(2)-i-PDT is very suitable for use in a transistor. Its good FET performance is fully discussed, based on electronic/topological properties and theoretical calculations.

    DOI: 10.1038/srep38535

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  • Highly crystalline, low band-gap semiconducting polymers based on phenanthrodithiophene-benzothiadiazole for solar cells and transistors

    Hiroki Mori, Hikaru Nonobe, Yasushi Nishihara

    POLYMER CHEMISTRY   7 ( 8 )   1549 - 1558   2016

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ROYAL SOC CHEMISTRY  

    New PDT-based polymers were combined with two types of benzothiadiazole (BT) derivatives to improve their crystallinity and solar cell performance. These polymers show several advantages, including strong intermolecular interactions, deep HOMO energy levels, and a dense packing structure with a short pi-pi stacking distance of 3.5-3.6 angstrom. Combinations of PDT and BT units in polymers formed highly crystalline thin films with a long-range order, even in films blended with a fullerene derivative. This suggests that the introduction of optimal acceptor units may increase the regularity of the polymers, leading to effective pi-pi overlaps between the polymer backbones. However, although the present polymers also formed an appropriate phase separation structure in blended films, in fabricated solar cell devices they yielded low power conversion efficiencies (PCEs) not exceeding 3.8%. GI-WAXS analysis revealed that both polymers were present in a predominantly edge-on orientation. This unsuitable orientation for PSCs prevented efficient carrier transport and reduced charge collection efficiency, resulting in low J(sc) and thus low PCE. On the other hand, these polymers also formed highly oriented edge-on structures on n(+)-Si/SiO2 substrates, which are suitable for high-performance field-effect transistors (FETs), and a fabricated FET device showed a hole mobility as high as 0.18 cm(2) V-1 s(-1).

    DOI: 10.1039/c5py01878a

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  • Impact of Alkyl Side Chains on Thin-film Transistor Performances in Phenanthrodithiophene-Isoindigo Copolymers

    Shuhei Nishinaga, Hiroki Mori, Yasushi Nishihara

    CHEMISTRY LETTERS   44 ( 7 )   998 - 1000   2015.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:CHEMICAL SOC JAPAN  

    Organic field-effect transistor (OFET) characteristics of phenanthrodithiophene (PDT)-isoindigo (IID) copolymers with different alkyl chains (12OD and BOBO) as an active layer, and their structure property relationships are described. The fabricated 12OD-based OFET device exhibited hole mobility of 0.16 cm(2)V(-1) s(-1). Grazing-incidence wide-angle X-ray scattering (GIWAXS) analysis revealed that 12OD formed highly ordered edge-on structure, whereas the BOBO film showed amorphous-like structure with no obvious pi-stacking crystallites. This may be attributed to a large steric hindrance of branched side chains in the BOBO polymer, which suppresses effective pi-pi overlaps between the adjacent polymer backbones.

    DOI: 10.1246/cl.150357

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  • Phenanthrodithiophene-Isoindigo Copolymers: Effect of Side Chains on Their Molecular Order and Solar Cell Performance

    Shuhei Nishinaga, Hiroki Mori, Yasushi Nishihara

    MACROMOLECULES   48 ( 9 )   2875 - 2885   2015.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER CHEMICAL SOC  

    The synthesis;,characterization, and solar cell application of newly developed semiconducting polymers containing phenanthro[1,2-b:8,7-b']dithiophene (PDT) combined with A bis(thienyl)isoindigo (IID) unit are,described. The polymers with longer, alkyl Chains are sufficiently soluble to be compatible with the processes required to manufacture solar cells. In conventional solar cell, devices, polymers with all branched alkyl chains tend to form a higher proportion of a well-ordered face-on crystallite in the pi-stack direction than those with both linear and branched alkyl chains, which significantly improves the Ell factor (FF), resulting in higher power conversion efficiency (PCE). In terms of optimizing the alkyl chain lengths; the installation of longer alkyl side chains on the polymer backbone leads to low molecular weight polymer, which may promote a large phase separation. As a result, the polymers 12OD and BOBO, beating shorter alkyl groups, performed better, and a BOBO polymer-based solar cell (PSC) showed the best PCE value up to 3.83%. In the inverted PSCs, the polymers with all branched alkyl chains have a higher face-on ratio than those with both linear and branched alkyl chains. Because of their improved J(sc), inverted PSCs with BOBO/PC71BM gave the best performance, with a PCE up to 5.28%. Although an obvious dependence of photovoltaic properties on molecular order-was observed in conventional solar cell devices, no trend was observed in inverted cells, Possibly attributable to their amorphous nature, which arises from the axisymmetrical structure of PDT, leading to less effective pi-pi overlap and low crystallinity.

    DOI: 10.1021/acs.macromol.5b00622

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  • Synthesis, Characterization, and Solar Cell and Transistor Applications of Phenanthro[1,2-b:8,7-b ']dithiophene-Diketopyrrolopyrrole Semiconducting Polymers

    Hiroki Mori, Masato Suetsugu, Shuhei Nishinaga, Ning-hui Chang, Hikaru Nonobe, Yasuhiro Okuda, Yasushi Nishihara

    JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY   53 ( 5 )   709 - 718   2015.3

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    Synthesis, characterization, and polymer solar cell and transistor application of a series of phenanthro[1,2-b:8,7-b]dithiophene-based donor-acceptor (D-A)-type semiconducting polymers combined with a diketopyrrolopyrrole unit are reported. The present polymers showed some unique features such as strong aggregation behavior, high thermal stability, and short - stacking distance (3.5-3.6 angstrom), which are suitable for high performance organic materials. In addition, they have a significantly extended absorption up to 1000 nm with a band gap of ca. 1.2 eV. However, such strong intermolecular interaction reduced their solubility and molecular weights, which resulted in low crystalline nature and moderate field-effect mobility of 0.01 cm(2) V-1 s(-1). Furthermore, such strong aggregation behavior led to the large-scale phase separation in the blend films, which may prevent the effective photocurrent generation, limiting J(sc) and power conversion efficiency of 2.0%. (c) 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 709-718

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  • Transistor application of new picene-type molecules, 2,9-dialkylated phenanthro[1,2-b:8,7-b '] dithiophenes (vol 3, pg 2413, 2015) Reviewed

    Kubozono Yoshihiro, Hyodo Keita, Mori Hiroki, Hamao Shino, Goto Hidenori, Nishihara Yasushi

    JOURNAL OF MATERIALS CHEMISTRY C   3 ( 12 )   2960   2015

  • A divergent synthesis of 3,10-dialkylpicenes

    Xi-Chao Chen, Shuhei Nishinaga, Yasuhiro Okuda, Jia-Ji Zhao, Jie Xu, Hiroki Mori, Yasushi Nishihara

    Organic Chemistry Frontiers   2 ( 5 )   536 - 541   2015

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    A series of 3,10-dialkylated picenes has been synthesized from 3,10-dimethoxypicene through a divergent approach involving Ni-catalyzed alkynylation of a C-O bond, alkylation, and hydrogenation.

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  • Synthesis of Methoxy-Substituted Picenes: Substitution Position Effect on Their Electronic and Single-Crystal Structures

    Hiroki Mori, Xi-chao Chen, Ning-hui Chang, Shino Hamao, Yoshihiro Kubozono, Kiyohiko Nakajima, Yasushi Nishihara

    JOURNAL OF ORGANIC CHEMISTRY   79 ( 11 )   4973 - 4983   2014.6

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    A series of picenes having methoxy groups was synthesized through Pd-catalyzed Suzuki-Miyaura couplings or Wittig reaction/intramolecular cyclization sequences, and their physicochemical properties and single-crystal structures were evaluated. The substitution position effects between the outer 1,12-, 2,11-, and 4,9-position and the inner 3,10-position are quite different; the former showed the same electronic structure as that of picene, but the latter results in a HOMO geometry different from those of picene and other methoxy picenes. In addition, crystal structures of four types of methoxy-substituted picenes 4a-c,e strongly depend on their substitution position and number of methoxy groups, which dramatically changes the structures from the fully anisotropic 1D pi-stacked structure to a unique 3D herringbone structure due to steric hindrance of methoxy groups. The calculations of transfer integrals based on their single-crystal structures reveal that the methoxy picenes have intermolecular overlaps less effective than that of the parent nonsubstituted picene. These results are attributed not only to the packing structure but also to electronic structures such as the HOMO distribution. The preliminary OFET of the representative 4c,e showed hole mobilities significantly lower than that of picene due to their less effective intermolecular overlaps, as predicted by the calculated transfer integrals.

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  • A Surface Potential Based Organic Thin-Film Transistor Model for Circuit Simulation Verified With DNTT High Performance Test Devices

    T. K. Maiti, T. Hayashi, L. Chen, H. Mori, M. J. Kang, K. Takimiya, M. Miura-Mattausch, H. J. Mattausch

    IEEE TRANSACTIONS ON SEMICONDUCTOR MANUFACTURING   27 ( 2 )   159 - 168   2014.5

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    A compact surface potential based model for organic thin-film transistors (OTFTs), including both tail and deep trap states across the band gap, is reported. The model has been developed on the basis of a complete surface potential approach for undoped-body OTFTs. Accurate surface potentials are calculated by explicitly including the floating backside potential that varies with applied biases. A pseudo-2D resistor model is developed to capture the structural features of the OTFT. The resistor model considers, in particular, the effects originating from a bias dependent 2D current flow in the channel region and results in accurate reproduction of the electrical characteristics. The fitting capability of the developed OTFT model is verified against measured high-performance dinaphtho thieno thiophene (DNTT) based field-effect transistor data. Accurate reproduction of the current characteristics of the OTFT test structures is verified from a week to a strong inversion regime.

    DOI: 10.1109/TSM.2014.2304736

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  • Small band gap polymers incorporating a strong acceptor, thieno[3,2-b]thiophene-2,5-dione, with p-channel and ambipolar charge transport characteristics

    Itaru Osaka, Toru Abe, Hiroki Mori, Masahiko Saito, Noriko Takemura, Tomoyuki Koganezawa, Kazuo Takimiya

    JOURNAL OF MATERIALS CHEMISTRY C   2 ( 13 )   2307 - 2312   2014

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    We present new donor-acceptor semiconducting polymers based on a strong acceptor unit, thieno[3,2-b]thiophene-2,5-dione (TTD). The polymers exhibit a deep LUMO energy level of around -4 eV while preserving a relatively low-lying HOMO energy level of below -5 eV and a quite small optical band gap of 1.2 eV. Interestingly, bottom-gate-top-contact transistor devices based on the polymers demonstrate p-channel behavior with high hole-mobilites of 1.38 cm(2) V-1 s(-1), whereas top-gate-bottom-contact devices show ambipolar behavior with hole and electron mobilities of similar to 0.12 and similar to 0.20 cm(2) V-1 s(-1), respectively. These results indicate the great potential of TTD to be used as the building unit for high-performance semiconducting polymers.

    DOI: 10.1039/c3tc32386b

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  • 5,10-Diborylated naphtho[1,2-c:5,6-c′]bis[1,2,5]thiadiazole: A ready-to-use precursor for the synthesis of high-performance semiconducting polymers

    Kazuaki Kawashima, Eigo Miyazaki, Masafumi Shimawaki, Yuki Inoue, Hiroki Mori, Noriko Takemura, Itaru Osaka, Kazuo Takimiya

    Polymer Chemistry   4 ( 20 )   5224 - 5227   2013.10

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    5,10-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)naphtho[1,2-c:5, 6-c′]bis[1,2,5]thiadiazole was successfully developed by the direct borylation reaction on the parent heterocycle and was utilized for the synthesis of naphtho[1,2-c:5,6-c′]bis[1,2,5]thiadiazole-based donor-acceptor copolymers. © 2013 The Royal Society of Chemistry.

    DOI: 10.1039/c3py00161j

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  • Synthesis of Substituted [6]Phenacenes through Suzuki-Miyaura Coupling of Polyhalobenzene with Alkenylboronates and Sequential Intramolecular Cyclization via C-H Bond Activation

    Ning-hui Chang, Hiroki Mori, Xi-chao Chen, Yasuhiro Okuda, Takeru Okamoto, Yasushi Nishihara

    CHEMISTRY LETTERS   42 ( 10 )   1257 - 1259   2013.10

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    A series of substituted [6]phenacenes were synthesized through the Suzuki-Miyaura coupling and intramolecular double cyclization, using a polyhalobenzene and two different alkenylboronates. This methodology provides a direct route to unsymmetrical [6]phenacenes. The physicochemical properties of four [6]phenacenes were evaluated using UV-vis and fluorescence spectroscopies as well as cyclic voltammetry.

    DOI: 10.1246/cl.130584

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  • Synthesis of Substituted Picenes through Pd-Catalyzed Cross-Coupling Reaction/Annulation Sequences and Their Physicochemical Properties

    Ning-hui Chang, Xi-chao Chen, Hikaru Nonobe, Yasuhiro Okuda, Hiroki Mori, Kiyohiko Nakajima, Yasushi Nishihara

    ORGANIC LETTERS   15 ( 14 )   3558 - 3561   2013.7

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    A novel and versatile synthetic method for picene derivatives is developed using the Pd-catalyzed intramolecular double cyclization of the corresponding 2,3-bis[(1Z)-2-phenylethenyl]-1,4-dichlorobenzenes, which are readily prepared by Suzuki-Miyaura cross-coupling reactions of polyhalobenzenes with (Z)-arylethenylboronates. The physical properties of the obtained picenes can be modified via introducing a variety of functional groups to the picene frame-work All compounds are investigated by UV-vis and fluorescence spectroscopic measurements, CV, and DFT calculations as well as X-ray diffraction analysis.

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  • Organic photovoltaics based on 5-hexylthiophene-fused porphyrazines

    Hiroki Mori, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    ORGANIC ELECTRONICS   13 ( 10 )   1975 - 1980   2012.10

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    Organic photovoltaics based on 5-hexylthiophene-fused porphyrazines as the donor material were investigated. Bilayer solar cells consisting of a solution deposited donor layer and a vapor deposited C-60 acceptor layer showed decent photovoltaic performances of up to PCE of 1.2%, which is comparable to the corresponding CuPc/C-60 bilayer solar cells. On the other hand, bulk-heterojunction solar cells with PC61BM gave much reduced photovoltaic performances with maximum PCE of 0.70%, which can be ascribed to poor film morphology. (C) 2012 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.orgel.2012.05.023

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  • Synthesis, Characterization, and Transistor and Solar Cell Applications of a Naphthobisthiadiazole-Based Semiconducting Polymer

    Itaru Osaka, Masafumi Shimawaki, Hiroki Mori, Iori Doi, Eigo Miyazaki, Tomoyuki Koganezawa, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   134 ( 7 )   3498 - 3507   2012.2

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    We report the synthesis and characterization of a novel donor acceptor semiconducting polymer bearing naphtho-bisthiadiazole (NTz), a doubly benzothiadiazole (BTz)-fused ring, and its applications to organic field-effect transistors and bulk heterojunction solar cells. With NTz's highly pi-extended structure and strong electron affinity, the NTz-based polymer (PNTz4T) affords a smaller bandgap and a deeper HOMO level than the BTz-based polymer (PBTz4T). PNTz4T exhibits not only high field-effect mobilities of similar to 0.56 cm(2)/(V s) but also high photovoltaic properties with power conversion efficiencies of similar to 6.3%, both of which are significantly high compared to those for PBTz4T. This is most likely due to the more suitable electronic properties and, importantly, the more highly ordered structure of PNTz4T in the thin film than that of PBTz4T, which might originate in the different symmetry between the cores. NTz, with centrosymmetry, can lead to a more linear backbone in the present polymer system than BTz with wdsymmetry, which might be favorable for better molecular ordering. These results demonstrate great promise for using NTz as a bulding unit for high-performance semiconducting polymers for both transistors and solar cells.

    DOI: 10.1021/ja210687r

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  • Drastic Change of Molecular Orientation in a Thiazolothiazole Copolymer by Molecular-Weight Control and Blending with PC61BM Leads to High Efficiencies in Solar Cells

    Itaru Osaka, Masahiko Saito, Hiroki Mori, Tomoyuki Koganezawa, Kazuo Takimiya

    ADVANCED MATERIALS   24 ( 3 )   425 - +   2012.1

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    A thiazolothiazole-thiophene copolymer is examined as the active material in bulk heterojunction (BHJ) solar cells. By optimizing the molecular weight, the polymer-based cells exhibit power conversion efficiencies as high as 5.7%. The increase in molecular weight improves the orientational order, and blending with phenyl-C61-butyric acid methyl ester (PC61BM) changes the orientational motif from edge-on to face-on, which accounts for the trend in photovoltaic performances. These results might give new insight into the structure-property relationships in BHJ solar cells.

    DOI: 10.1002/adma.201103065

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  • Naphtho[2,3-b:6,7-b ']dichalcogenophenes: Syntheses, Characterizations, and Chalcogene Atom Effects on Organic Field-Effect Transistor and Organic Photovoltaic Devices

    Masahiro Nakano, Hiroki Mori, Shoji Shinamura, Kazuo Takimiya

    CHEMISTRY OF MATERIALS   24 ( 1 )   190 - 198   2012.1

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    New linear-shaped naphtho[2,3-b:6,7-b']-difurans (NDFs) and -selenophenes (NDSs) were synthesized selectively from 3,7-dibromo-2,6-dihydroxynaphthalene and evaluated as organic semiconductors in comparison to corresponding naphtho[2,3-b:6,7-b']dithiophenes (NDTs). Evaluation of the electronic structures of the parent compounds by means of electrochemical and optical measurements clearly indicated that NDT and NDS are quite similar to each other, whereas only NDF has a marked different electronic structure. Thin film devices, including organic field-effect transistors (OFETs) and bilayer photovoltaics (OPVs) with C-60 or C-70 as an acceptor layer, were fabricated with the diphenyl derivatives using vacuum deposition. The thin films were found to be nicely crystalline with the edge-on molecular orientation both on Si/SiO2 (for OFETs) and ITO substrates (for OPVs). The thin films acted as active semiconducting layer in OFETs with mobility higher than 0.1 cm(2) V-1 s(-1) and as a donor layer in OPVs with power conversion efficiencies of up to 2.0%, indicating that the present naphthodichalcogenophenes are potential core structures for the development of new organic semiconductors.

    DOI: 10.1021/cm202853b

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  • [2,2 '] Bi[naphtho[2,3-b]furanyl]: a versatile organic semiconductor with a furan-furan junction

    Kazuki Niimi, Hiroki Mori, Eigo Miyazaki, Itaru Osaka, Hayato Kakizoe, Kazuo Takimiya, Chihaya Adachi

    CHEMICAL COMMUNICATIONS   48 ( 47 )   5892 - 5894   2012

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    [2,20']Bi[naphtho[2,3-b] furanyl] was synthesized, characterized, and examined as an organic semiconductor for thin-film OFETs, bilayer OPVs, and organic light-emitting transistors (OLETs). In the devices, the material acted as a p-type semiconductor, showing moderately high mobility in OFETs, good photo conversion efficiency in OPVs, and blue-green emission in OLETs.

    DOI: 10.1039/c2cc31960h

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  • Efficient Photocurrent Generation at Dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene/C-60 Bilayer Interface

    Hiroki Mori, Kazuo Takimiya

    APPLIED PHYSICS EXPRESS   4 ( 6 )   061602-1-061602-3   2011.6

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    Bilayer hetero-junction solar cells based on dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene (DNTT) as the donor and C-60 as the acceptor were fabricated and evaluated. Although the bilayer thin film is almost transparent above 550 nm in the absorption spectra, relatively good solar cell performances [J(sc) = 3.96 (+/- 0.07) mAcm(-2), V-oc = 0.66 (+/- 0.01) V, FF = 0.64 (+/- 0.03), and eta = 1.70 (+/- 0.08) %] were achieved, indicating that efficient photocurrent generation at the DNTT/C-60 interface takes place. (C) 2011 The Japan Society of Applied Physics

    DOI: 10.1143/APEX.4.061602

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  • Simple Oligothiophene-Based Dyes for Dye-Sensitized Solar Cells (DSSCs): Anchoring Group Effects on Molecular Properties and Solar Cell Performance

    Eigo Miyazaki, Takashi Okanishi, Yuki Suzuki, Nozomi Ishine, Hiroki Mori, Kazuo Takimiya, Yutaka Harima

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   84 ( 5 )   459 - 465   2011.5

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    Simple oligothiophene-based dyes with a cyanoacrylic acid anchor were synthesized and evaluated as a photosensitizer for dye-sensitized solar cells (DSSCs). Although the molecular properties of the dyes at a glance are quite similar to those of related oligothiophene dyes with a carboxylic acid anchor, the DSSC performance of the former (up to eta = 4.8%) is fairly improved over the latter (approximate to 1.2%). Absorption spectra of the oligothiophene dyes with the cyanoacrylic acid are red-shifted compared to those with the carboxylic acid, resulting in the improved photocurrent conversion efficiency at above 600 nm in the DSSCs. With the aid of theoretical calculations, electronic properties of the oligothiophene dyes were investigated, and it turned out that the excited states of the dyes are significantly affected by the anchoring groups. The cyanoacrylic acid anchor brings about a stabilized LUMO with localized electron density on the cyanoacrylic acid moiety, whereas the carboxylic acid dye has relatively a high-lying LUMO with delocalized electron density over the oligothiophene moiety. Thus, the difference in the DSSC performance is rationalized by the different electronic structure at the excited states caused by the anchoring groups on the oligothiophene cores.

    DOI: 10.1246/bcsj.20100302

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  • Alkylated Dinaphtho[2,3-b:2 ',3 '-f]Thieno[3,2-b] Thiophenes (C-n-DNTTs): Organic Semiconductors for High-Performance Thin-Film Transistors

    Myeong Jin Kang, Iori Doi, Hiroki Mori, Eigo Miyazaki, Kazuo Takimiya, Masaaki Ikeda, Hirokazu Kuwabara

    ADVANCED MATERIALS   23 ( 10 )   1222 - +   2011.3

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    A series of alkylated dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophenes (C-n-DNTTs) are developed as vapor-processable organic semiconductors for organic thin-film transistors (OTFTs). All the C-n-DNTT-based OTFTs showed typical p-channel FET characteristics and among them, C-10-DNTT, possessing two n-decyl groups, gave excellent FET characteristics under the ambient conditions with mobility close to 8.0 cm(2)V(-1)s(-1) and I-on/I-off > 10(8).

    DOI: 10.1002/adma.201001283

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  • Dinaphthopentalenes: Pentalene Derivatives for Organic Thin-Film Transistors Reviewed

    Takeshi Kawase, Takeru Fujiwara, Chitoshi Kitamura, Akihito Konishi, Yasukazu Hirao, Kouzou Matsumoto, Hiroyuki Kurata, Takashi Kubo, Shoji Shinamura, Hiroki Mori, Eigo Miyazaki, Kazuo Takimiya

    Angewandte Chemie   122 ( 42 )   7894   2010.9

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    DOI: 10.1002/ange.201003609

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  • Molecular Modification of 2,7-Diphenyl[1]benzothieno[3,2-b]benzothiophene (DPh-BTBT) with Diarylamino Substituents: From Crystalline Order to Amorphous State in Evaporated Thin Films

    Takafumi Izawa, Hiroki Mori, Yusuke Shinmura, Masahito Iwatani, Eigo Miyazaki, Kazuo Takimiya, Hsio-Wen Hung, Masayuki Yahiro, Chihaya Adachi

    CHEMISTRY LETTERS   38 ( 5 )   420 - 421   2009.5

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    Introduction of diarylamino substituents on 2,7-diphenyl[1]-benzothieno[3,2-b]benzothiophene (DPh-BTBT) caused morphological change in the evaporated thin-film state: from highly crystalline films with edge-on molecular orientation for DPh-BTBT to amorphous films for the diarylamino derivatives. The former was unsuitable as a hole-transporting layer in organic light-emitting diodes (OLEDs), whereas the latter acted as a superior hole-transporting layer in multilayered OLEDs.

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  • 5-Hexylthiophene-fused porphyrazines: new soluble phthalocyanines for solution-processed organic electronic devices

    Eigo Miyazaki, Ayaka Kaku, Hiroki Mori, Masahito Iwatani, Kazuo Takimiya

    JOURNAL OF MATERIALS CHEMISTRY   19 ( 33 )   5913 - 5915   2009

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    5-Hexylthiophene-fused porphyrazines were designed and synthesized as novel soluble phthalocyanine derivatives. Single-crystal X-ray structural analyses indicated that they have a well-ordered structure in the solid state in spite of the existence of disorder in the thiophene-fused porphyrazine core. Due to the high solubility and improved molecular ordering, the present 5-hexylthiophene-fused porphyrazines showed comparable performance to vapor-processable phthalocyanines as solution-processable organic semiconductors: solution-processed OFETs showed mobility of up to 0.2 cm(2) V(-1) s(-1).

    DOI: 10.1039/b910824f

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  • クロスカップリング反応を利用した有機薄膜太陽電池用ポリマーの開発 Invited

    森裕樹, 西原康師

    月刊ファインケミカル   49 ( 11 )   12 - 20   2020.11

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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  • 新規アクセプター部位を含む π 共役系高分子の開発と有機薄膜太陽電池への応用

    森裕樹, 西原康師

    化学工業   68 ( 11 )   37 - 44   2017

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  • Recent Progresses in Organic Field Effect Transistors Based on π-Conjugated Organic Molecules

    Hiroki Mori, Yasushi Nishihara

    Polymer   63 ( 12 )   866 - 870   2014

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  • π 共役系分子を用いる有機電界効果トランジスタの最前線 (共著)

    森裕樹, 西原康師

    高分子   63 ( 12 )   866 - 870   2014

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Presentations

  • Development of Anthrabisthiadiazole-Based Semiconducting Polymers and Their Application to Organic Photovoltaic Cells

    Hiroki Mori, Yukiya Minagawa, Shuhei Nishinaga, Ryosuke Takahashi, Yasushi Nishihara

    2021.9.7 

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    Event date: 2021.9.7 - 2021.9.10

    Language:Japanese   Presentation type:Poster presentation  

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  • Photovoltaic Properties of Organic Solar Cells using Anthrabisthiadiazole-Based Polymers/Y6 System

    Hiroki Mori, Yukiya Minagawa, Yasushi Nishihara

    2021.3.16 

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    Event date: 2021.3.16 - 2021.3.19

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 含硫黄8環系フェナセン型分子の合成および有機電界効果トランジスタへの応用

    石田 拓己, 垣内 新, 森 裕樹, 西原 康師

    第68回応用物理学会春季学術講演会 

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    Event date: 2021.3.16 - 2021.3.19

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 新規複素多環芳香族骨格を基盤とした高分子半導体の開発 Invited

    森裕樹

    第35回中国四国地区高分子若手研究会  2020.11.6 

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    Event date: 2020.11.5 - 2020.11.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  • エステル置換アントラビスチアジアゾール骨格を有する 半導体ポリマーの開発

    森裕樹, 山田裕貴, 皆川幸哉, 西原康師

    第69回高分子討論会  2020.9.16 

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    Event date: 2020.9.16 - 2020.9.18

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • アルコキシ置換アントラビスチアジアゾールを有する 新規半導体ポリマーの開発

    森 裕樹, 皆川 幸哉, 西原 康師

    第67回応用物理学会春季学術講演会 

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    Event date: 2020.3

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Development of Semiconducting Polymers Based on New Electron-Deficient Aromatic Compounds Invited

    Hiroki Mori

    The 68th SPSJ Symposium on Macromolecules, The Japan-Korea Joint Session,  2019.9.25 

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    Event date: 2019.9.25 - 2019.9.27

    Language:English   Presentation type:Oral presentation (invited, special)  

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  • フェナントロジチオフェン系ポリマーを用いた非フラーレン型太陽電池の特性

    森 裕樹, 渡部将也, 西原康師

    第66回応用物理学会春季学術講演会  2019.3.11 

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    Event date: 2019.3.9 - 2019.3.12

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • チエノチオフェンジオンを有する高移動度半導体ポリマー

    尾坂格, 尾坂格, 阿部達, 斉藤慎彦, 森裕樹, 小金澤智之, 瀧宮和男

    応用物理学会春季学術講演会講演予稿集(CD-ROM)  2013 

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    Event date: 2013

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  • ナフトビスチアジアゾール系半導体ポリマーを用いた高効率有機薄膜太陽電池

    尾坂格, 尾坂格, 加ケ良剛志, 島脇雅史, 森裕樹, 小金澤智之, 瀧宮和男

    高分子学会予稿集(CD-ROM)  2013 

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    Event date: 2013

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  • ナフトビスチアジアゾール骨格を有する新規半導体ポリマーの合成と有機薄膜太陽電池への応用

    島脇雅史, 森裕樹, 土井伊織, 宮碕栄吾, 小金澤智之, 尾坂格, 尾坂格, 瀧宮和男

    応用物理学関係連合講演会講演予稿集(CD-ROM)  2012 

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    Event date: 2012

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  • チエノチオフェンジオンを有する新規スモールバンドギャップ型半導体ポリマー

    尾坂格, 尾坂格, 阿部達, 森裕樹, 斎藤慎彦, 小金澤智之, 瀧宮和男

    高分子学会予稿集(CD-ROM)  2012 

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    Event date: 2012

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  • 非フラーレン型太陽電池におけるフェナントロジチオフェン系半導体ポリマーの特性

    第67回高分子討論会  2018 

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  • アントラビスチアジアゾール骨格を有する半導体ポリマーの合成と物性

    第67回高分子討論会  2018 

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  • Selective synthesis and transistor application of isomeric bisbenzothienobenzodithiophene derivatives

    日本化学会第98回春季年会  2018 

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  • Synthesis and OFET Characteristics of Two Isomeric Angular-Shaped Bisbenzothienobenzodithiophenes

    28th International Symposium on the Organic Chemistry of Sulfur (ISOCS-28) PA-2  2018 

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  • ビニレンで架橋されたチアジアゾールを有する半導体ポリマーの開発

    第65回応用物理学会春季学術講演会  2018 

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  • ピレノビスチアジアゾールを有する半導体ポリマーの開発と非フラーレン型太陽電池への応用

    第65回応用物理学会春季学術講演会  2018 

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  • ピレン系アクセプターを有する半導体高分子の開発と非フラーレン系太陽電池への展開

    知恵の見本市2017  2017 

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  • フェナセン型アクセプターを有する半導体ポリマーの開発と有機薄膜太陽電池への応用

    第66回高分子討論会  2017 

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  • 電子求引性基を有するアントラビスチアジアゾール系ポリマーの合成と太陽電池特性

    2017年日本化学会中国四国支部大会  2017 

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  • ビニレンで架橋された拡張 π 電子系アクセプターを有する半導体ポリマーの開発と有機太陽電池の光電変換特性

    第66回高分子討論会  2017 

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  • 広いバンドギャップを有するピレンビスチアジアゾール系半導体ポリマーの合成と太陽電池特性

    第66回高分子討論会  2017 

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  • アルキル置換 9 環系チエノアセン類の合成と有機電界効果トランジスタへの応用

    第64回有機金属化学討論会  2017 

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  • 屈曲型ビスベンゾチエノベンゾジチオフェン誘導体の合成および有機電界効果トランジスタへの応用

    第64回有機金属化学討論会  2017 

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  • Synthesis of Dialkylated Thienoacene with Nine Rings and Its Application to Field-Effect Transistors

    International Symposium on JST ACT-C Project “Invention of π-Electronic Organic Molecules toward Electronic Energy Devices”  2017 

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  • Development of Pyrenobisthiadiazole-based Wide-Bandgap Semiconducting Polymers and Its Application to Organic Solar Cells

    International Symposium on JST ACT-C Project “Invention of π-Electronic Organic Molecules toward Electronic Energy Devices”  2017 

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  • 高い開放電圧を示すフェナセン型半導体ポリマーの開発と太陽電池特性

    第64回応用物理学会春季学術講演会  2017 

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  • Synthesis and Characterization of Donor-Acceptor Type Semiconducting Polymers Based on a Phenacene-Type Acceptor Unit

    International Symposium on JST ACT-C Project “Invention of π-Electronic Organic Molecules toward Electronic Energy Devices”  2017 

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  • 新規 7 環性チエノアセンの選択的合成と有機電界効果トランジスタへの応用

    第111回有機合成シンポジウム  2017 

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  • Molecular Weight Dependence of Phenanthrodithiophene-Isoindigo Copolymers on Their Thin-Film Structures and Solar Cell Performances

    International Symposium on JST ACT-C Project “Invention of π-Electronic Organic Molecules toward Electronic Energy Devices”  2017 

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  • ビスベンゾチエノベンゾジチオフェンおよびアルキル誘導体の合成と有機電界効果トランジスタへの応用

    日本化学会第97春季年会  2017 

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  • チアジアゾール縮環新規多環芳香族化合物の合成と有機薄膜太陽電池への展開

    第111回有機合成シンポジウム  2017 

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  • ジベンゾアントラジフランの合成および有機電界効果トランジスタへの応用

    日本化学会第97春季年会  2017 

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  • 含硫黄 9 環系多環芳香族化合物の合成および有機電界効果トランジスタへの応用

    日本化学会第97春季年会  2017 

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  • アントラビスチアジアゾールを有する新規半導体ポリマーの開発と有機太陽電池への応用

    第64回応用物理学会春季学術講演会  2017 

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  • 様々な可溶性側鎖を有するフェナントロジチオフェン-イソインジゴ系半導体ポリマーの合成と物性

    第65回高分子学会年次大会  2016 

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  • 可溶性側鎖を有するアントラジチオフェン系ポリマーの開発と有機電界効果トランジスタへの応用

    第63回応用物理学会春季学術講演会  2016 

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  • アルキル置換フェナントロジチオフェン系半導体ポリマーを用いた有機薄膜太陽電池の光電変換特性

    第63回応用物理学会春季学術講演会  2016 

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  • Development of Dibenzoanthradithiophene Derivatives: Synthesis, Characterization, and Application to Organic Field-Effect Transistors

    The 23rd International SPACC Symposium-Functional complexes and their new applications  2016 

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  • アセン骨格を有する新規半導体材料の開発および有機電界効果トランジスタへの応用

    第6回CSJ化学フェスタ2016  2016 

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  • 異なる分子量をもつフェナントロジチオフェン系半導体ポリマーにおける薄膜構造とOPV特性相関

    第6回CSJ化学フェスタ2016  2016 

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  • フェナセン骨格を有する低バンドギャップ半導体ポリマーの開発と有機薄膜太陽電池への応用

    2016年日本化学会中国四国支部大会  2016 

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  • フェナセン型半導体高分子の開発と有機電子デバイスへの応用

    知恵の見本市2016  2016 

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  • 9環系チエノアセンの合成と有機電界効果トランジスタへの応用

    第63回有機金属化学討論会  2016 

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  • フェナントロジチオフェン系半導体ポリマーにおける可溶性側鎖と分子量が薄膜構造および太陽電池特性に及ぼす影響

    第65回高分子討論会  2016 

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  • フェナントロジチオフェン-ベンゾチアジアゾール系半導体ポリマーを用いた高性能有機薄膜太陽電池の開発

    第65回高分子学会年次大会  2016 

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  • ジベンゾアントラジチオフェン誘導体の合成および有機電界効果トランジスタへの応用

    第63回有機金属化学討論会  2016 

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  • 4,7-ジアルキルフェナントロジチオフェン-イソインジゴ系半導体ポリマーを用いた有機電子デバイスにおける構造-特性相関

    第65回高分子学会年次大会  2016 

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  • 4,7-ジアルキルフェナントロジチオフェン系半導体ポリマーの開発と有機電子デバイスへの応用

    第64回高分子学会年次大会  2015 

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  • フェナントロジチオフェン-イソインジゴ系半導体ポリマーを用いた有機電界効果トランジスタの特性

    第64回高分子学会年次大会  2015 

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  • 4,7-ジアルキルフェナントロジチオフェンを導入した低バンドギャップ半導体ポリマーの合成と太陽電池特性

    日本化学会第95春季年会  2015 

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  • 含硫黄フェナセン型多環芳香族化合物の合成および有機電界効果トランジスタへの応用

    日本化学会第95春季年会  2015 

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  • 高結晶性フェナントロジチオフェン系半導体ポリマーを用いた有機トランジスタおよび有機太陽電池

    平成26年度 JST ACT-C 進歩ジウム in 岡山 「新しい分子変換反応による機能性有機分子の創製」  2015 

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  • Development of Semiconducting Polymers Based on Phenanthro-dithiophene-Benzothiadiazole and Their Application to Organic Electronic Devices

    日本化学会第95春季年会  2015 

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  • パラジウム触媒による共重合反応を利用したフェナントロジチオフェン系半導体ポリマーの合成と有機電子デバイスへの応用

    第62回有機金属化学討論会  2015 

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  • Optimization of side chains in phenanthrodithiophene-isoindigo copolymers: Relationships between thin-film structure and device performance

    Pacifichem 2015  2015 

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  • Development of piceno[4,3-b:9,10-b’]dithiophene (PiDT) and dialkyl substituted PiDTs (Cn-PiDTs): Synthesis, characterization, and application to organic field-effect transistors

    Pacifichem 2015  2015 

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  • Synthesis and characterization of pyrenobisthiadiazole-based semiconducting polymers

    Pacifichem 2015  2015 

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  • Synthesis of substituted picenes and its derivatives and their application to field-effect transistors

    Pacifichem 2015  2015 

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  • Development of 4,7-dialkylated phenanthrodithiophene-based semiconducting polymers and their application to high-performance solar cells

    Pacifichem 2015  2015 

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  • Synthesis of Various 3,10-Dialkylpicenes via Carbon-Oxygen Bond Activation as a Key Step

    2015年日本化学会中国四国支部大会  2015 

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  • フェナセン型半導体高分子を用いた高効率有機薄膜太陽電池の開発

    知恵の見本市2015  2015 

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  • アルキル置換フェナントロジチオフェンからなるドナー・アクセプター型半導体ポリマーの合成と光電変換特性

    2015年日本化学会中国四国支部大会  2015 

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  • Impact of Isomeric Structures on FET Performances in Phenanthrodithiophene (PDT) Derivatives: Selective Synthesis, Physicochemical Properties, and Application to Organic Field-Effect Transistors

    The 18th IUPAC International Symposium on Organometallic Chemistry Directed Towards Organic Synthesis(OMCOS 18)  2015 

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  • アントラジチオフェン骨格を有するオールドナーポリマーの合成および有機電界効果トランジスタへの応用

    2015年日本化学会中国四国支部大会  2015 

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  • 高い結晶性を有するフェナントロジチオフェン系半導体ポリマーの開発と有機電子デバイスへの展開

    2015年日本化学会中国四国支部大会  2015 

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  • フェナントロジチオフェン-イソインジゴ型半導体ポリマーにおける薄膜構造と有機デバイス特性との相関

    2015年日本化学会中国四国支部大会  2015 

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  • アルキル置換フェナントロジチオフェン-イソインジゴ系半導体ポリマー:可溶性側鎖の置換位置が太陽光電池特性に及ぼす影響

    2015年日本化学会中国四国支部大会  2015 

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  • ピセノ[4,3-b:9,10-b’] ジチオフェン(PiDT) とそのアルキル誘導体の合成および有機電界効果トランジスタへの応用

    2015年日本化学会中国四国支部大会  2015 

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  • ピレノ[4,5-c:9,10-c’] ビス[1,2,5]チアジアゾールを基本骨格に有する半導体ポリマーの開発と有機電子デバイスへの応用

    2015年日本化学会中国四国支部大会  2015 

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  • ピセノ[4,3-b:9,10-b’]ジチオフェン (PiDT) 誘導体の合成および有機電界効果トランジスタへの応用

    第76回応用物理学会秋季学術講演会  2015 

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  • フェナントロジチオフェン系半導体ポリマー:アルキル側鎖の置換位置が太陽電池特性に及ぼす影響

    第64回高分子討論会  2015 

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  • 炭素-酸素結合の切断を伴うアルキニル化を鍵反応とする 3,10-ジアルキルピセンの効率的合成

    第62回有機金属化学討論会  2015 

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  • Synthesis and Characterization of Phenanthrodithiophene-Based Semiconducting Polymers Containing Isoindigo Units

    XXVI International Conference on Organometallic Chemistry (ICOMC 2014)  2014 

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  • Synthesis and Characterization of Semiconducting Polymers Based on Phenanthrodithiophene-Benzothiadiazole

    XXVI International Conference on Organometallic Chemistry (ICOMC 2014)  2014 

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  • Synthesis of Various Methoxy-Substituted Picenes and Effects of Their Position on Single Crystal Structures

    XXVI International Conference on Organometallic Chemistry (ICOMC 2014)  2014 

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  • フェナントロジチオフェン系半導体ポリマーを用いた有機薄膜太陽電池の構造-特性相関

    第63回高分子討論会  2014 

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  • An Efficient Synthesis of Phenanthro[1,2-b:8,7-b’]dithiophene (PDT) and Its Application to Organic Field-Effect Transistors

    XXVI International Conference on Organometallic Chemistry (ICOMC 2014)  2014 

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  • 縮合多環系低分子および高分子半導体材料の開発

    第9回有機デバイス院生研究会  2014 

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  • Synthesis, Characterization, and Solar Cell Applications of a Novel Phenanthro[1,2-b:8,7-b’]dithiophene-Based Semiconducting Polymer

    XXVI International Conference on Organometallic Chemistry (ICOMC 2014)  2014 

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  • イソインジゴユニットを含むフェナントロジチオフェン型半導体ポリマーの合成と物性

    第63回高分子学会年次大会  2014 

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  • フェナントロジチオフェン-ベンゾチアジアゾール型半導体ポリマーの合成と物性

    第63回高分子学会年次大会  2014 

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  • フェナセン型分子を含む新規ドナー・アクセプター型半導体ポリマーの開発と有機薄膜太陽電池への応用

    2014年春季第61回応用物理学関係連合講演会  2014 

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  • アルキル置換フェナントロ[1,2-b:8,7-b’]ジチオフェン誘導体の合成および有機電界効果トランジスタへの応用

    日本化学会第94春季年会  2014 

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  • Synthesis, Charcaterization, and Solar Cell Applications of Phenanthro[1,2-b:8,7-b’]dithiophene-Based Semiconducting Polymers

    CAMPUS ASIA Pilot Program, Winter Seminar on Life and Material Sciences in Okayama  2014 

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  • Synthesis, Characterization, and Transistor Applications of Phenanthro[1,2-b:8,7-b’]dithiophene (PDT)

    International Workshop on Interface Science for Novel Physical Properties and Electronics  2013 

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  • フェナントロジチオフェン-ベンゾチアジアゾール系低バンドギャップ半導体ポリマーの合成と太陽電池特性

    第62回高分子討論会  2013 

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  • イソインジゴを含むフェナントロジチオフェン系半導体ポリマーの合成

    第62回高分子討論会  2013 

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  • パラジウム触媒を用いたクロスカップリング反応による置換[5]および[6]フェナセン誘導体の合成と物性

    第60回有機金属化学討論会  2013 

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  • フェナセン型ドナーユニットを用いた低バンドギャップポリマーの合成と有機薄膜太陽電池への応用

    第62回高分子討論会  2013 

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  • ナフトジカルコゲノフェン誘導体の有機電子デバイスへの応用:カルコゲン原子のデバイス特性に与える影響

    2012年春季第59回応用物理学関係連合講演会  2012 

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  • Relationship Between Molecular Orientation and Photovoltaic Properties of Organic Photovoltaics Based on Molecular Donors/C60 Interface

    The 2012 International Conference on Flexible and Printed Electronics (ICFPE2012)  2012 

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  • Relationship Between Molecular Orientation and Photovoltaic Properties of Molecular Donors/C60 Solar Cells

    OIST International Symposium on Organic Electronics 2012 (ISOE 2012)  2012 

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  • Application of DNTT Derivatives to Organic Photovoltaics and Structure-Property Correlation

    10th International Symposium on Functional π-Electron Systems (Fπ10)  2011 

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  • ジナフトチエノチオフェン (DNTT)誘導体を用いた有機薄膜太陽電池の構造-特性相関

    第91回日本化学会春季年会  2011 

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  • Photovoltaic Properties of Novel Thiophene-Fused Porphyrazine-Based Organic Thin-Film Solar Cells

    International Conference on Science and Technology of Synthetic Metals (ICSM2010)  2010 

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  • 高移動度DNTT誘導体の有機薄膜太陽電池への応用と構造−物性相関

    2010年秋季第71回応用物理学会学術講演会  2010 

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  • チオフェン縮環ポルフィラジンの有機薄膜太陽電池への応用

    第89回日本化学会春季年会  2009 

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  • 新規チオフェン縮環ポルフィラジン誘導体を用いた有機薄膜太陽電池

    2009年秋季第70回応用物理学会学術講演会  2009 

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  • 新規チオフェン縮環ポルフィラジンのFETおよび光電変換特性

    第6回薄膜材料デバイス研究会  2009 

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  • Novel Hole-transporting Materials Based on [1]Benzothieno[3,2-b]benzothiophenes: Properties and Application to OLED devices

    Fifth International Conference on Molecular Electronics and Bioelectronics (M&BE-5)  2009 

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  • ベンゾチエノベンゾチオフェン骨格を基にしたホール輸送材料の開発と有機EL素子への応用

    第35回有機典型元素化学討論会  2008 

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Awards

  • Award for Encouragement of Research in Polymer Science; The Society of Polymer Science, Japan (2019)

    2020.5   Development of Semiconducting Polymers Based on Novel Heteropolycyclic Aromatic Hydrocarbon

    Hiroki Mori

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  • 岡山工学振興会科学技術賞

    2018.6   公益財団法人 岡山工学振興会  

    森裕樹

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Research Projects

  • 高性能有機薄膜太陽電池を達成可能な半導体ポリマーの開発

    2021.06 - 2022.02

    岡山県産業労働部 産業振興課  令和 3 年度特別電源所在県科学技術振興事業に係る委託研究テーマ 若手研究者による基盤技術研究 

    森 裕樹

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    Authorship:Principal investigator 

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  • 特異な電子構造を有する含硫黄フェナセン系分子群の伝導特性

    2021.04 - 2024.03

    独立行政法人 日本学術振興会  科学研究費助成事業 基盤研究B (一般) 

    西原 康師, 岡本 敏宏, 森 裕樹

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    Authorship:Coinvestigator(s) 

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  • Development of low bandgap n-type semiconductors based on A2-D-A1-D-A2 type molecular structure

    Grant number:19K15650  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists  Grant-in-Aid for Early-Career Scientists

    森 裕樹

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    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

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  • アントラビスチアジアゾール骨格を基盤とした高性能有機薄膜太陽電池材料の開発

    2019.04 - 2020.03

    公益財団法人 東燃ゼネラル石油研究奨励・奨学財団  研究助成 

    森 裕樹

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    Authorship:Principal investigator 

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  • 高効率有機薄膜太陽電池に向けた p 型半導体ポリマーの開発

    2018.07 - 2019.03

    公益財団法人 岡山工学振興会  奨励研究助成 

    森 裕樹

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    Authorship:Principal investigator 

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  • チアジアゾールを基盤とした高効率有機薄膜太陽電池用高分子半導体材料の開発

    2018.07 - 2019.03

    公益財団法人 八雲環境科学振興財団  環境研究助成 一般研究 

    森 裕樹

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    Authorship:Principal investigator 

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  • チアジアゾール系半導体ポリマーを基盤とした高性能有機薄膜太陽電池材料の開発

    2018.06 - 2019.02

    岡山県産業労働部 産業振興課  平成30年度特別電源所在県科学技術振興事業に係る委託研究テーマ 若手研究者による基盤技術研究 

    森 裕樹

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    Authorship:Principal investigator 

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  • development of novel high-performance semiconducting polymers based on a pi-extended acceptor unit

    Grant number:26810129  2014.04 - 2017.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    Mori Hiroki

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    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

    In order to achieve the high-performance and next-generation organic thin-film solar cells and field-effect transistors, a pyrenobisthiadiazole as a new electron-acceptor with extended π-electron systems and its semiconducting polymers were successfully synthesized and characterized. These polymers showed strong absorption up to 600 nm in the visible region, and have good potential for high-performance organic solar cells and field-effect transistors.

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  • Basic Organic Chemistry 2 (2020academic year) Fourth semester  - 金1,金2

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  • Advanced Organic Material Chemistry (2020academic year) Late  - 木1,木2

  • Seminar in Functional Organic Chemistry (2020academic year) Year-round  - その他

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