题目：Photoactiveorganic field transistor with photochromic molecule as a channel layer
报告人: Prof. YutakaWakayama
International Center for Materials Nanoarchitectonics(WPI-MANA),
National Institute for Materials Science (NIMS)
地点: 材化部 907-1445
时间:2016年3月25日上午9:30-10:30
[摘要]:
Wedeveloped an optically controllable organic field transistor (OFET) by employing photochromic diarylethene molecules for a channellayer. The drain current wasreversibly changed by alternating UV and VIS light irradiation; a closedring isomer produced by UV light allowed transistor operation, meanwhile anopen ring isomer produced by VIS light showed no drain current. As a result, aconsiderably high on/offratio of 102 (104 %) was achieved. These results indicate that this compoundhas two distinct properties: organic semiconductor and photochromism. We clarified thatthe drain current modulation can be attributed to the transformationin the π-conjugation system accompanied by photoisomerization, i.e., a phasetransition between semiconductor-insulator was induced by light irradiation.Our finding demonstrates the potential to achieve high-performanceopto-electrical organic devices including optical sensors, optical memory andphotoswitching transistors.
Reference:
[1] ACS Appl. Mater. & Interfaces 5 (2013) 3625-3630. “Optically- and electrically-driven organicthin film transistors with diarylethene photochromic channel layers”
[2] Sci. Technol. Adv. Mater. 15 (2014) 024202-1-19.“Recent progress in photoactive organic field-effect transistors”
[3] Organic Electronics 21 (2015) 149-154. “Interfaceengineering for improving optical switching in a diarylethene-channeltransistor”
Name: Yutaka Wakayama
Birthday: 19th, July, 1963
Nationality: Japanese
Affiliation:
International Center for Materials Nanoarchitectonics (WPI-MANA),
National Institute for Materials Science (NIMS)
Specialty: Solid-state materials science
Address： 1-1 Namiki, Tsukuba 305-0044, Japan
Academic degree: Ph.D. in Material Science, TsukubaUniversity, 1998
Educational and Working History
2011-Present:MANA Scientist, MANA, NIMS
2014-Present:Professor, Kyushu University-NIMS Graduate Program
2010-2014: Associate Professor, Kyushu University-NIMSGraduate Program
2001-2010: Senior Researcher in NIMS
1999-2001: Senior Researcher, National Research Institute for Metals
1998-1999: Post doctoral fellow, Max-Planck Institute ofMicrostructure Physics, Germany
1994-1998: Researcher, JST, ERATO, Tanaka Solid JunctionProject, Japan
1991-1992: Researcher, JST, ERATO, Kunitake MolecularArchitecture Project, Japan
1989-1994: Researcher, Asahi Glass Company, Japan
Research Interests
Fundamental studies on molecular assemblies in variousdimensions and their application to optoelectronic devices: crystalline andelectronic structure of molecular superlattice, carrier transport throughdirected- and self-assembled molecular wires, STM study on two-dimensional supermoleculesand molecular quantum dot for single-electron devices.
Main Publications
1. Recent progress in photoactive organicfield-effect transistors
Yutaka Wakayama, Ryoma Hayakawa, Hoon-Seok Seo
Sci. Technol. Adv. Mater. 15 (2014) 024202-1-19. [InvitedReview Paper]
2. Single-electrontunneling through molecular quantum dots in metal-insulator-semiconductorstructure
Ryoma Hayakawa, Nobuya Hiroshiba,Toyohiro Chikyow, Yutaka Wakayama
Adv. Func. Mater. 21 (2011) 2933-2937.
3. Solid-statereactions in binary molecular assemblies of F16CuPc and pentacene
Yutaka Wakayama, Dimas G. de Oteyza J. M.Garcia Lastra, D. J. Mowbray
ACS Nano 5 (2011) 581-589.
4. Growth and electrical properties ofN,N’-Bis(n-pentyl)terrylene-3,4:11,12- tetracarboximidethin films
M. Petit, R. Hayakawa, Y. Shirai, Y.Wakayama, J. P. Hill, K. Ariga, T. Chikyow
Appl. Phys. Lett. 92 (2008) 163301-163303.
5. Self-assembledmolecular nanowires of 6,13-bis(methylthio)pentacene: growth, electricalproperties and applications
Yutaka Wakayama, Ryoma Hayakawa, ToyohiroChikyow, Shinichi Machida, Tomonobu Nakayama,Stefan Egger, Dimas G. de Oteyza, Helmut Dosch, KenjiKobayashi
Nano Letters 8 (2008) 3273-3277.
(报告联系人：徐庆锋老师）