Faculty Profiles - NAGAMATSU Shuichi

Papers - NAGAMATSU Shuichi

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Anisotropic characteristics in soluble organic semiconductors by using Floating Film Transfer Method : forming highly oriented film Reviewed

HONMA Ryoji, NAGAMATSU Shuichi, KANETO Keiichi, TAKASHIMA Wataru

IEICE technical report 111 ( 4 ) 51 - 54 2011.04

Syntheses and Characterizations of Thienylenevinylene Derivatives Reviewed

TAHARA Kanako, DAUENDORFFER Amaud, NAGAMATSU Shuichi, TAKASHIMA Wataru, KANETO Keiichi

IEICE technical report 111 ( 4 ) 55 - 58 2011.04

Robust Hole Transport in a Thienothiophene Derivative toward Low-cost Electronics Reviewed International journal

39 ( 12 ) 1315 - 1316 2010.11

Ambipolar characteristics of solution processed bilayer field effect transistors based on poly(3-hexylthiophene) and fullerene derivatives Reviewed

1115 53 - 58 2010.05

Ambipolar Transport in Bilayer Organic Field-Effect Transistor Based on Poly(3-hexylthiophene) and Fullerene Derivatives Reviewed International journal

Takeomi Morita,Shign Vipul,Shinya Oku,Shuichi Nagamatsu,Wataru Takashima,Shuzi Hayase,Keiichi Kaneto

JAPANESE JOURNAL OF APPLIED PHYSICS 49 ( 4 ) 041601.1 - 041601.5 2010.04

Solution-processable Oligothiophene Derivatives with Branched Alkyl Chains and Their Thin-film Transistor Characteristics Reviewed International journal

Lu Ming,Shuichi Nagamatsu,Yuji Yoshida,Masayuki Chikamatsu,Reiko Azumi,Kiyoshi Yase

Chemistry Letters 39 60 - 61 2010.01

Comparative Study on Gate Insulators of Polymers and SiO2 in Transport Properties of p- and n-Type Organic Field-Effect Transistors Reviewed International journal

Shinya Oku,Toshiya Nagase,Shuichi Nagamatsu,Wataru Takashima,Keiichi KAneto

JAPANESE JOURNAL OF APPLIED PHYSICS 49 ( 1 ) 01AB14.1 - 01AB14.4 2010.01

Molecular orientation of poly(3-butylthiophene) friction-transferred films Reviewed International journal

Nobutaka Tanigaki,Shuichi Nagamatsu,Wataru Takashima,Yuji Yoshida

Thin Solid Films 518 ( 2 ) 853 - 856 2009.11

Enhancement of Transport Characteristics in Poly(3-hexylthiophene) Films Deposited with Floating Film Transfer Method Reviewed International journal

Morita Takeomi, Singh Vipul, Nagamatsu Shuichi, OKU Shinya, TAKASHIMA Wataru, KANETO Keiichi

Applied physics express 2 ( 11 ) "111502 - 1"-"111502-3" 2009.11

Multi-Layered Oriented Polyfluorene Films Reviewed International journal

Shuichi Nagamatsu,Masahiro Misaki,Yuji Yoshida,Reiko Azumi,Nobutaka Tanigaki,Kiyoshi Yase

The Journal of Physical Chemistry B 113 ( 17 ) 5746 - 5751 2009.04

Solution preparation effect on n-type field-effect-transistor characteristics using PCBM Reviewed

HAMACHI Kousuke, MORITA Takeomi, NAGAMATSU Shuichi, TAKASHIMA Wataru, KUWASHIMA Shuichiro, KANETO Keiichi

IEICE technical report ( The Institute of Electronics, Information and Communication Engineers ) 109 ( 20 ) 1 - 4 2009.04

Language：English Publishing type：Research paper (scientific journal)

We investigated the preparation dependence on the electronic characteristics of n-type organic field-effect transistors (OFETs) consisted of [6.6]-Phenyl C_<61>-Butyric acid Methyl ester (PCBM) as active layer. Although field-effect mobility, threshold voltage and on-current were almost stationary, the off-current was strongly changed with the agitation time of the solution. A cluster distribution model has been proposed to explain the results.

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/110007227494

Synthesis of highly strained phenes consisting of polynuclear aromatic compounds and their properties Reviewed

Tasaki Matsuri, Moriguchi Tetsuji, Tsuge Akihiko, Nagamatsu Syuuichi, Takashima Wataru

Abstracts of Symposium on Physical Organic Chemistry ( The Society of Physical Organic Chemistry, Japan ) 2009 ( 0 ) 312 - 312 2009.01

Language：English Publishing type：Research paper (scientific journal)

Recently, organic transistors controlling organic EL displays and electronic papers have been developed. Organic semiconductors which are the component of organic transistors have advantages such as lightness, flexibility, possibly applying being applied to a large area reasonably. However, they have disadvantages such as low solubility and a low electric conductivity. In this study t-butyl group was introduced into the polynuclear aromatic compounds in order to dissolve in various solvents. Improvement of an electric conductivity by the stacking the compounds employing expansion of the p conjugated system is also the another purpose of this study. At first, synthesis of novel polynuclear aromatic compounds was carried out. Their structure analyzed by 1H-NMR spectra and X-rays structure analysis. The expansion of the p conjugated system in compounds who confirmed by the UV spectrum measurement. In addition, Field effect transistor by compounds was composed and its electric conductivity was measured.

DOI： 10.11494/kisoyuki.2009.0.312.0

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/130004728938

Polarized white emission from polymer LEDs of aligned binary blend Reviewed International journal

Hijikata Y., Misaki M., Nagamatsu S., Chikamatsu M., Yoshida Y., Azumi R., Tanigaki N., Yamashita M., Yase K.

IDW '08 - Proceedings of the 15th International Display Workshops 2 1063 - 1064 2008.12

Language：English Publishing type：Research paper (international conference proceedings)

We demonstrate polymer light-emitting diodes with polarized white emission for liquid crystal display backlights application. Polarized white emission was realized by spin-coating a mixed solution of blue emissive polymer and orange emissive polymer onto an alignment layer. Our devices turned on at 3.5 V and reached a brightness of 1830 cd/m2 at 10.0 V with an efficiency of 0.4 cd/A. The integrated polarization ratio was estimated to be 2.4 with the CIE coordinates of (0.33, 0.34).

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77954091627&origin=inward

Highly efficient polarized polymer light-emitting diodes utilizing oriented films of beta-phase poly(9,9-dioctylfluorene) Reviewed International journal

Masahiro Misaki,Masayuki Chikamatsu,Yuji Yoshida,Reiko Azumi,Nobutaka Tanigaki,Kiyoshi Yase,Shuichi Nagamatsu,Yasukiyo Ueda

Applied Physics Letters 93 ( 2 ) 023304 - 023304.3 2008.07

Side-Chain Effects on Friction-Transferred Polymer Orientation Reviewed International journal

Nagamatsu Shuichi, Misaki Masahiro, Kimura Tatsumi, YOSHIDA Yuji, AZUMI Reiko, TANIGAKI Nobutaka, YASE Kiyoshi

Polymer journal 39 ( 12 ) 1300 - 1305 2007.12

Single-crystal-like structure of poly(9,9-dioctylfluorene) thin films evaluated by synchrotron-sourced grazing-incidence X-ray diffraction Reviewed International journal

Misaki M., Nagamatsu S., Chikamatsu M., Yoshida Y., Azumi R., Tanigaki N., Ueda Y., Yase K.

Polymer Journal 39 ( 12 ) 1306 - 1311 2007.12

Language：English Publishing type：Research paper (scientific journal)

Detailed structures of friction-transferred poly(9,9-dioctylfluorene) (PFO) thin films have been studied using synchrotron-sourced grazing-incidence X-ray diffraction (GIXD). The results of in-plane GIXD were in full agreement with those of electron diffraction in our previous study. We also revealed the structures of liquid-crystalline (LC) and crystalline films that were prepared by rapid and slow cooling from the LC melted state of the friction-transferred films, respectively. For the crystalline films, the results of in-plane GIXD were not in full agreement with those of electron diffraction; additional weak peaks of the odd 001 reflections were observed only in the GIXD profiles. This implies that the twofold screw symmetry along the c-axis of PFO is broken. The rocking profiles for each reflection gave the order parameter of almost one for the crystalline films and 0.67 for the LC films. These results suggest the ability of friction transfer for obtaining single-crystal-like thin films and the importance of carefully designed annealing process for the applications of the films to various optoelectronic devices. © 2007 The Society of Polymer Science.

DOI： 10.1295/polymj.PJ2007063

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=38849155837&origin=inward

Unipolarization of ambipolar organic field effect transistors toward high-impedance complementary metal-oxide-semiconductor circuits Reviewed International journal

Takashima W., Murasaki T., Nagamatsu S., Morita T., Kaneto K.

Applied Physics Letters 91 ( 7 ) 2007.08

Language：English Publishing type：Research paper (scientific journal)

Ambipolar organic field effect transistors (OFETs), consisting of a composite of polyhexylthiophene (PHT) and [6,6]-phenyl C61-butylic acid methyl ester (PCBM), was converted into a p - or n -type OFET by insertion of a thin tetracyanoquinodimethane (TCNQ) or tetrathiafluvalene (TTF) buffer layer. The interface in the Au/TCNQ/PHT:PCBM composite transports hole but blocks electron, while the transported carrier was switched to electron with insertion of a TTF layer. The selective transport is probably due to vacuum level matching or temporal doping. High impedance in a complementary metal-oxide-semiconductor inverter was demonstrated with unipolarized ambipolar FETs, resulting in a decrease in the through current. © 2007 American Institute of Physics.

DOI： 10.1063/1.2770963

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=34548022859&origin=inward

Structure and Electrical Properties of Unsubstituted Oligothiophenes End-Capped at the β-Position Reviewed International journal

Jiro Chisaka,Ming Lu,Shuichi Nagamatsu,Masayuki Chikamatsu,Yuji Yoshida,Midori Goto,Reiko Azumi,Masafumi Yamashita,Kiyoshi Yase

Chemistry of Materials 19 ( 10 ) 2694 - 2701 2007.05

ポリフルオレン積層配向膜の作製及び構造評価

永松秀一,三崎雅裕,吉田郵司,阿澄玲子,谷垣宣孝,八瀬清志

信学技報 107 ( 13 ) 11 - 15 2007.04

Highly efficient polarized polymer light-emitting diodes prepared by friction-transfer technique Reviewed International journal

Misaki M., Nagamatsu S., Chikamatsu M., Yoshida Y., Tanigaki N., Azumi R., Ueda Y., Yase K.

IDW '06 - Proceedings of the 13th International Display Workshops 2 1299 - 1301 2006.12

Language：English Publishing type：Research paper (international conference proceedings)

We demonstrate highly efficient polarized polymer light-emitting diodes (p-PLEDs) for liquid crystal display (LCD) backlights application. The optimization of the device structure drastically improves the performance of p-PLEDs: the devices turn on at 4 V and reach a brightness of 1793 cd/m 2 at 12.5 V with an efficiency of 1.23 cd/A. The electroluminescent (EL) dichroic ratio (integrated intensity) is estimated to be 45.

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=57649176631&origin=inward

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Papers - NAGAMATSU Shuichi