Faculty Profiles - HAYASHI Yasuhiko

Study on organic transistors with [6]phenacene

フェナセン系薄膜電界効果トランジスタの論理回路応用

三上隆弘, 江口律子, 下侑馬, 浜尾志乃, 後藤秀徳, 岡本秀毅, 林靖彦, 久保園芳博

応用物理学会春季学術講演会講演予稿集(CD-ROM) 63rd 2016

高性能フェナセン薄膜FETの開発と論理回路応用

三上隆弘, 下侑馬, 浜尾志乃, 岡本秀毅, 郷田慎, 江口律子, 後藤秀徳, 林靖彦, 久保園芳博

日本化学会中国四国支部大会講演要旨集 2015 2015

フェナセン単結晶FETの特性と論理回路応用

下侑馬, 三上隆弘, 浜尾志乃, 岡本秀毅, 郷田慎, 江口律子, 後藤秀徳, 林靖彦, 久保園芳博

日本化学会中国四国支部大会講演要旨集 2015 2015

多環フェナセン単結晶電界効果トランジスタの伝導特性と論理回路応用

下侑馬, 三上隆弘, 浜尾志乃, 江口律子, 後藤秀徳, 岡本秀毅, 郷田慎, 佐藤かおり, 久保園芳博, 林靖彦

応用物理・物理系学会中国四国支部合同学術講演会講演予稿集 2015 2015

フェナセン系薄膜電界効果トランジスタのデバイス構造の改変による伝導特性制御と論理回路応用

三上隆弘, 下侑馬, 浜尾志乃, 江口律子, 後藤秀徳, 岡本秀毅, 久保園芳博, 林靖彦

応用物理・物理系学会中国四国支部合同学術講演会講演予稿集 2015 2015

フェナセン単結晶を用いた高性能電界効果トランジスタの作製及びその伝導特性

下侑馬, 三上隆弘, 村上寛虎, 浜尾志乃, 江口律子, 後藤秀徳, 岡本秀毅, 郷田慎, 佐藤かおり, 林靖彦, 久保園芳博

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 76th 2015

フェナセン系薄膜電界効果トランジスタの伝導特性評価と論理回路応用

三上隆弘, 下侑馬, 浜尾志乃, 江口律子, 後藤秀徳, 岡本秀毅, 林靖彦, 久保園芳博

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 76th 2015

10aAE-4 Threading dislocation motion in Sb-doped SiGe thin films with various Ge content

Yamashita Yoshifumi, Maki Shinya, Fushimi Tatsuya, Ohno Yutaka, Yonenaga Ichiro, Nishikawa Takeshi, Hayashi Yasuhiko

Meeting abstracts of the Physical Society of Japan 69 ( 2 ) 706 - 706 2014.8

MIKAMI Takahiro, GOTO Hidenori, KUBOZONO Yoshihiro, HAYASHI Yasuhiko

IEICE technical report. Electron devices 114 ( 12 ) 35 - 39 2014.4

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

The [6]phenacene molecule consists of six benzene rings and takes a W-shaped structure. It is well known that [6]phenacene field-effect transistor (FET) shows an excellent p-channel FET characteristics. However, the organic FET device has a serious problem that the absolute threshold voltage (|V_<th>|) is too high. Actually, the [6]phenacene thin film FET has such a serious problem. Here we tried to insert either electron acceptor or donor in the interface between [6]phenacene thin film and SiO_2 gate dielectric in order to decrease the |V_<th>|. In this study, we used diverse electron acceptors and donors, and the variation of |V_<th>| was systematically investigated, showing the V_<th>-shift of 30V in some electron acceptors. Furthermore, the drastic change of mobility (μ) in [6]phenacene FET was observed depending on the hydrophobic treatment of surface of SiO_2 gate dielectric, showing the μ value increased up to 5.0cm^2V^<-1>s^<-1> by the hydrophobic treatment with hexamethyldisilazane (HMDS).

Fabrication and characterization of picene-thin-film electric-double-layer transistors

Shimo Yuma, Goto Hidenori, Kubozono Yoshihiro, Hayashi Yasuhiko

IEICE technical report. Electron devices 114 ( 12 ) 31 - 34 2014.4

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

Electric-double-layer (EDL) field-effect transistors are fabricated with thin films of picene, in order to reduce the operation voltage. We used two types of ionic liquids for the picene-thin-film EDL FET (EDLT). One is ionic liquid gel, which provides the absolute threshold voltage (|V_<th>|) as low as 1.87V, while the other is ionic liquid polymer sheet which provides the |V_<th>| as low as 0.87V. The small |V_<th>| values in these EDLTs are available for practical electronic devices, which may lead to the new development for integration of organic transistors

28pAM-12 Partial dislocation motion in 4H-SiC with/without electron beam irradiation

Yamashita Yoshifumi, Shimomura Takuya, Fujii Yuji, Nishikawa Takeshi, Hayashi Yasuhiko

Meeting abstracts of the Physical Society of Japan 69 ( 1 ) 933 - 933 2014.3

Fabrication of tin-filled carbon nanofibres by microwave plasma vapour deposition and their in situ heating observation by environmental transmission electron microscopy. Reviewed International journal

Tomoharu Tokunaga, Takumi Kanematsu, Takahumi Ito, Takahisa Ota, Yasuhiko Hayashi, Katsuhiro Sasaki, Takahisa Yamamoto

Nanoscale research letters 8 ( 1 ) 302 - 302 2013.6

Language：English

Sn-filled carbon nanofibres (CNFs) are fabricated by microwave plasma chemical deposition. Scanning electron microscopy observations revealed the existence of a Sn island under the CNFs. The structure of the CNFs is investigated, and the behaviour of Sn in the internal space of CNFs is revealed by performing in situ heating observations by environmental transmission electron microscopy (ETEM). ETEM observations reveal that they have low-crystallized carbon wall and Sn occupies not only the CNF's internal space but also its carbon wall. The Sn inside the CNF is completely covered by the carbon wall. Further, the in situ heating observations reveal that Sn within the internal space and the carbon wall of the CNFs diffused to the outside during heating. Moreover, it is found that higher membered carbon rings and defects in the graphite layer act as diffusion routes between disordered carbon layers.

DOI： 10.1186/1556-276X-8-302

PubMed

Newly synthesized n-type fullerene derivative and its application to bulk heterojunction solar cells

C-13-10 Interface control of polymer solar cell by polyethylene glycol

Kawakita Takafumi, Karakasa Yasuhiro, Sakakibara Yuya, Hayashi Yasuhiko, Soga Tetsuo, Kalita Golap, Tanemura Masaki

Proceedings of the Society Conference of IEICE 2012 ( 2 ) 129 - 129 2012.8

金属充填カーボンナノチューブの成長と磁化特性

堀田義朗, 徳永智春, 佐々木勝寛, 黒田光太郎, 伊藤陽一, 張奉鎔, 林靖彦, 藤田武志

日本金属学会講演概要 144th 308 2009.3

HAYASHI Yasuhiko, SUKEGUCHI D., INUKAI H., AFRE R., TORU T., NAKAMURA S., SHIBATA T., SOGA T.

IEICE technical report 108 ( 387 ) 39 - 42 2009.1

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

We studied the bulk heterojunction organic solar cell of P3HT and a newly synthesized methanofullerene derivative. The methanofullerene derivative has the electron-withdrawing methoxycarbonylphenyl and electron-donating dioctyloxyphenyl groups attached to the cyclopropane, the former of which lowers the reduction potential of the methanofullerene acceptor and would enhance its acceptability, and the latter of which increases the LUMO level. Compared with PCBM, the open circuit voltage increased upon introducing this molecule as well as by changing the annealing temperature.

Recent progress on nanoprobe and nanoneedle

金属充填カーボンナノチューブの成長と磁化特性

堀田義朗, 徳永智春, 佐々木勝寛, 黒田光太郎, 伊藤陽一, 張奉鎔, 林靖彦, 藤田武志

日本金属学会講演概要 143rd 472 2008.9

TANEMURA Masaki, KITAZAWA Masashi, SUGITA Yoshitaka, MIYAWAKI Ako, KUTSUNA Masaki, HAYASHI Yasuhiko, LAU Shu Ping

IEICE technical report 108 ( 122 ) 59 - 64 2008.7

Language：English Publisher：The Institute of Electronics, Information and Communication Engineers

Ar^+ ion bombardment of carbon surfaces (both bulk carbon and carbon-coated substrates) induced the growth of conical protrusions, and single carbon nanofibers (CNFs) grew on the tips without any catalyst even at room temperature. CNFs thus grown were typically 20-50nm in diameter and 0.2-10μm in length. Solely standing and densely distributed CNFs were successfully applied to scanning probe microscope (SPM) tips and flexible field electron emission devices, respectively. In addition, low-temperature fabrication of various nanostructures by the ion-irradiation was also demonstrated. Thus, the ion-irradiation method was believed to be promising for the low-temperature fabrication of nanomaterials.

電子顕微鏡法による材料開発のための微細構造研究最前線(6)ホログラフィー・ローレンツ顕微鏡カーボンナノチューブに充填した円柱状コバルトの磁化測定

カーボンファイバーファブリック上に成長させたカーボンナノチューブの電子放出特性

鈴木賢一, 松本英俊, 皆川美江, 谷岡明彦, 林靖彦, 福薗一幸, AMARATUNGA Gehan

高分子学会予稿集(CD-ROM) 57 ( 1 Disk1 ) 2008

カーボンファイバーファブリック上に成長させたカーボンナノチューブの電子放出特性

松本英俊, 鈴木賢一, 今泉伸治, 皆川美江, 谷岡明彦, 林靖彦, 福薗一幸, AMARATUNGA Gehan

高分子学会予稿集(CD-ROM) 57 ( 2 Disk1 ) 2008

磁性金属内包カーボンナノチューブの作製と評価

林靖彦, 藤田武志, 徳永智春, 内藤綱彦, 種村眞幸

応用物理学会学術講演会講演予稿集 68th ( 1 ) 534 2007.9

藤田武志, 林靖彦, 徳永智春, 山本和生

まてりあ 45 ( 12 ) 896 2006.12

Quantitative Evaluation of Magnetic Induction of Co Fully Encapsulated in Carbon Nanotube

FUJITA Takeshi, HAYASHI Yasuhiko, TOKUNAGA Tomoharu, YAMAMOTO Kazuo

Materia Japan 45 ( 12 ) 896 - 896 2006.12

Characterization of amorphous carbon thin film synthesized by nitrogen radical and methane plasma sources

KAMADA Naoki, HAYASHI Yasuhiko, SOGA Tetsuo, JIMBO Takashi

IEICE technical report. Electron devices 105 ( 89 ) 27 - 31 2005.5

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

Conductivity of amorphous carbon (a-C) was successfully controlled by incorporation of nitrogen atoms using a double beam method (DBM), where both rf nitrogen radical and rf methane plasma sources were controlled separately to optimize the nitrogen incorporation.