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MURATA, Hideyuki Professor
Materials Science, Nanomaterials and Devices
◆Degrees
PhD Kyushu University
◆Professional Experience
2018 - 2020 : Japan Advanced Institute of Science and Technology , Graduate School of Materials Science , Dean
2016 - : Japan Advanced Institute of Science and Technology , Graduate School of Advanced Science and Technology , Professor
2009 - 2016 : Japan Advanced Institute of Science and Technology , Graduate School of Advanced Science and Technology , Professor
2006 - 2009 : Japan Advanced Institute of Science and Technology , Graduate School of Materials Science , Associate Professor
2002 - 2006 : Japan Advanced Institute of Science and Technology
2001 - 2002 : University of London, Imperial College London, Department of Chemistry, Senior Lecturer
1996 - 2001 : US Naval Research Laboratory, Optical Science Division, Research Contractor
1992 - 1996 : 三井石油化学工業 機能材料研究所 研究員
◆Specialties
Electronic devices and equipment
◆Research Keywords
Molecular Electronics, 有機メモリー, 有機薄膜太陽電池, OLED, Organic Electronics
◆Research Interests

My primary research interests centre on the chemistry and physics of organic materials with pi-electron system. My studies have ranged from synthesis of novel electronic materials and their application to the optoelectronic devices including organic light-emitting diodes (OLEDs), organic solar cells, organic TFT and memory, linear and non-linear optics.
Novel conjugated polymer and its thin film growth by vapour phase deposition.
Novel electron transporting polymers (polyoxadiazoles) were developed and film deposition was achieved using vapour deposition of monomers. This unique technique allows large-area uniform thin film growth with very few defects. My group was the first to successfully fabricate multilayer polymer LEDs by vapour phase deposition.
Material development for organic electronics.
We have reported that a novel electron transport material, silole derivative, exhibit very high electron mobility even in an air. We have found that silole derivatives show very high photoluminescence quantum yield of close to unity. The OLED using these compounds as an electron transport layer and an emitting layer showed the efficiency close to the theoretical limit for a device using fluorescent emitter.
Device Physics in OLEDs based on small molecules.
We have investigated mechanisms for enhancing efficiency and stability of the devices by doping of fluorescent dyes. Followings are selected topics for our recent work on OLEDs using guest-host active layer:

1. Direct carrier recombination on guest molecule in guest-host active layer. 2. The role of host material in PL quantum yield and EL quantum efficiency based upon energy transfer mechanism.3. Temperature-independent EL quantum efficiency due to doping of fluorescent dye.4. Significant improvement of device durability due to doping of fluorescent dyes.

■Publications

◆Published Papers
Tunable Threshold Voltage of Organic CMOS Inverter Circuits by Electron Trapping in Bilayer Gate Dielectrics
Toan Thanh DAO, Hideyuki MURATA
IEICE Transactions on Electronics, E98.C, 5, 422-428, 2015
Improved initial drop in operational lifetime of blue phosphorescent organic light emitting device fabricated under ultra high vacuum condition
H. Yamamoto, J. Brooks, M. S. Weaver, J. J. Brown, T. Murakami, H. Murata
Applied Physics Letters, 99, 3, -, 2011
絶縁層中のイオンによる分極を用いた有機電界効果トランジスタのドレイン電流変調
酒井 平祐, 矢島 覚, 今野 広大, 松島 敏則, 村田 英幸
Molecular electronics and bioelectronics, 22, 2, 101-104, 2011
Independent control of open-circuit voltage of organic solar cells by changing film thickness of MoO3 buffer layer
Yoshiki Kinoshita, Rie Takenaka, Hideyuki Murata
Applied Physics Letters, 92, 24, 243309-243309, 2008
Photoluminescence and electroluminescence characteristics of 3,3′-dieyano-[7,7′-biindolizine]-1,1,2,2′-tetracarboxylic acid 1,2-diethyl 1′,2′-dimethyl ester
Toshinori Matsushima, Ryosuke Kimura, Masahiro Asahara, Hideyuki Murata
Chemistry Letters, 37, 12, 1260-1261, 2008
◆Misc
Highly Efficient Light-Emitting Electrochemical Cells using Silicon-containing Ionic Liquid and Conjugated Polymer
村田英幸, 平松考樹, 鈴木貴斗
電子情報通信学会大会講演論文集(CD-ROM), 2021, -, 2021
Reaction rate constant of singlet exciton quenching in degraded OLEDs
松岡薫, LE Duy Cong, NGUYEN Duong Dai, 江口敬太郎, 鈴木寿一, 村田英幸
応用物理学会春季学術講演会講演予稿集(CD-ROM), 68th, -, 2021
Mass analysis of fluorescence quencher in Alq3 thin film generated by photochemical and electrochemical reactions
中浜英理菜, LE Duy Cong, 四十万谷智子, 江口敬太郎, 村田英幸
応用物理学会春季学術講演会講演予稿集(CD-ROM), 68th, -, 2021
Elucidation of operation mechanism of high-efficiency light-emitting electrochemical cell using silicon-containing ionic liquid
平松考樹, 鈴木貴斗, 村田英幸
応用物理学会春季学術講演会講演予稿集(CD-ROM), 67th, -, 2020
Matrix effect on the orientation of gold particles in conductive inks
並川直樹, 村田英幸
応用物理学会春季学術講演会講演予稿集(CD-ROM), 67th, -, 2020
◆Books
Systematic study of organic solar cells cross-section by EDS to correlate donor-acceptor vertical concentration gradients and device performances, Varun Vohra, Nur Tahirah Razali, and Hideyuki Murata in “Science and Applications of Tailored
128-147, One Central Press, USA 2017, 2017
Chapter 7: Interface Engineering: A key aspect for the potential commercialization of printable organic photovoltaic cells, in Printable Solar Cells
235-261, Scrivener Publishing LLC, 2017
第5章 有機EL素子の劣化機構
編者(編著者) , 「最先端の有機EL ―基礎物理・材料化学・デバイス応用と解析技術」（監修： 安達千波矢、藤本弘）（シーエムシー出版2017年4月）, 2017
Chemical Science of π-Electron Systems・Comparative Study of Fullerene Derivatives Blended with a High Efficiency Naphthobisthiadiazole-Based Polymer for Organic Photovoltaic Applications
Springer, 2015
高次π空間の創発と機能開発・第３章 10節 自己組織的高次π空間を利用した高効率有機薄膜太陽電池
共著, 183-186, シーエムシー出版, 2013
◆Conference Activities & Talks
有機ＥＬ素子の高信頼化を目指した基礎研究（業績賞受賞記念講演）
有機EL討論会 第26回例会, 東京, 2018
Degradation analysis of OLED by Fourier transform ion cyclotron resonance mass spectrometry imaging
The 10th International Symposium on Organic Molecular Electronics, Sunmessse Tosu (Saga, Japan), 2018
A High sensitive and flexible dual-gate organic pressure sensor (Invited)
The 2nd Nippon-Taiwan Workshop on Innovation of Emergent Materials, Ishikawa, Japan, 2018
Efficient organic solar cells employing controlled molecular orientation(Invited)
2017 North East Asia Symposium of Emerging Materials Innovation, Seoul. Korea, 2017
Efficient organic solar cells employing controlled molecular orientation
The 3rd Symposium of the Center for High-performance Nature-derived Materials and the 4th Int. Symposium for Green-Innovation Polymers, Ishikawa, Japan, 2017

■Teaching Experience

Quantum Mechanics, Optical Properties of Solids (E), Solid State Physics and its Application to Electronics I, 量子力学特論, 光物性特論(E), 固体電子物性・デバイス特論Ⅰ(E)

■Contributions to  Society

◆Academic Society Affiliations
The Institute of Image Information and Television Engineers, OLED Forum Japan, The Society of Polymer Science, Japan, Society for Information Display, American Chemical Society, American Physical Society, Chemical Society of Japan, The Japan Society of Applied Physics
◆Academic Contribution
The 25th International Display Workshop , Program Committee , 2018 - 2018
The 2nd Nippon-Taiwan Workshop on Innovation of Emergent Materilas , JAIST, Professor Hideyuki Murata , 2018 - 2018 , Japan advanced Institute of Science and Technology
The 24th International Display Workshops， , Program Committee , 2017 - 2017 , Sendai International Center、Japan

■Academic  Awards

・ The 11th Japan OLED Forum Outstanding Achievement Award , MURATA Hideyuki , Japan OLED Forum , 2018