Nanotechnology/Materials / Applied physical properties

Osaka University   Faculty of Engineering Science

- 1980

Osaka University

1988 - 1991

Institute for Molecular Science

1984 - 1988

Institute for Molecular Science, Technical Assistant

1984 - 1988

Hall Effect in Bulk-Doped Organic Single Crystals Reviewed

Chika Ohashi, Seiichiro Izawa, Yusuke Shinmura, Mitsuru Kikuchi, Seiji Watase, Masanobu Izaki, Hiroyoshi Naito, Masahiro Hiramoto

ADVANCED MATERIALS   29 ( 23 )   2017.6

Single crystal organic photovoltaic cells using lateral electron transport Reviewed

Mitsuru Kikuchi, Kenichiro Takagi, Hiroyoshi Naito, Masahiro Hiramoto

ORGANIC ELECTRONICS   41   118 - 121   2017.2

ENERGETIC AND NANOSTRUCTURAL DESIGN OF SMALL-MOLECULAR-TYPE ORGANIC SOLAR CELLS Reviewed

Hiramoto Masahiro

ADVANCES IN CHEMICAL PHYSICS, VOL 162   162   137 - 204   2017

Emission properties of [Eu(hfa)(3)(phen)] and [Eu(hfa)(3)(TPPO)(2)] dispersed in a fibrous network comprising p-chlorophenol plus AOT organogels Reviewed

Yasuhiro Watanabe, Takashi Harada, Hideki Kawai, Toshihiko Kaji, Masahiro Hiramoto, Katsura Nishiyama

JOURNAL OF MOLECULAR LIQUIDS   217   51 - 56   2016.5

Solvent-Dependent Properties and Higher-Order Structures of Aryl Alcohol plus Surfactant Molecular Gels Reviewed

Shotaro Katsube, Masaru Kinoshita, Kenshi Amano, Takaaki Sato, Yukiteru Katsumoto, Tatsuya Umecky, Toshiyuki Takamuku, Toshihiko Kaji, Masahiro Hiramoto, Yoko Tsurunaga, Katsura Nishiyama

LANGMUIR   32 ( 17 )   4352 - 4360   2016.5

Effects of doping at the ppm level in Simple n(+)p-homojunction organic photovoltaic cells Reviewed

Chika Ohashi, Yusuke Shinmura, Masayuki Kubo, Masahiro Hiramoto

ORGANIC ELECTRONICS   27   151 - 154   2015.12

Enhancing the photocurrent in high-photovoltage organic solar cells by doping Reviewed

Mitsuru Kikuchi, Yusuke Shinmura, Toshihiko Kaji, Takahiro Kono, Yuji Yoshida, Masahiro Hiramoto

JAPANESE JOURNAL OF APPLIED PHYSICS   54 ( 11 )   2015.11

Direct detection of density of gap states in C-60 single crystals by photoemission spectroscopy Reviewed

Fabio Bussolotti, Janpeng Yang, Masahiro Hiramoto, Toshihiko Kaji, Satoshi Kera, Nobuo Ueno

PHYSICAL REVIEW B   92 ( 11 )   2015.9

Direct detection of density of gap states in C-60 single crystals by photoemission spectroscopy (vol 92, 115102, 2015) Reviewed

Fabio Bussolotti, Janpeng Yang, Masahiro Hiramoto, Toshihiko Kaji, Satoshi Kera, Nobuo Ueno

PHYSICAL REVIEW B   92 ( 11 )   2015.9

Mapping of band-bending in organic pn-homojunctions Reviewed

Yohei Yamashina, Yusuke Shinmura, Norihiro Ishiyama, Toshihiko Kaji, Masahiro Hiramoto

JOURNAL OF APPLIED PHYSICS   117 ( 12 )   2015.3

Structures of Naphthol-AOT Self-assembly Organogels and Their Applications to Dispersing Media of Rare-earth Complexes Reviewed

Shotaro Katsube, Takashi Harada, Tatsuya Umecky, Toshiyuki Takamuku, Toshihiko Kaji, Masahiro Hiramoto, Yukiteru Katsumoto, Katsura Nishiyama

CHEMISTRY LETTERS   43 ( 12 )   1861 - 1863   2014.12

Degradation in organic solar cells under illumination and electrical stresses in air Reviewed

Kenji Harafuji, Hiroaki Sato, Takahiro Matsuura, Yuta Omoto, Toshihiko Kaji, Masahiro Hiramoto

JAPANESE JOURNAL OF APPLIED PHYSICS   53 ( 12 )   2014.12

Ionization sensitization of doping in co-deposited organic semiconductor films Reviewed

Yusuke Shinmura, Yohei Yamashina, Toshihiko Kaji, Masahiro Hiramoto

APPLIED PHYSICS LETTERS   105 ( 18 )   2014.11

Mapping of band-bending for doped C-60 films Reviewed

Yusuke Shinmura, Tadashi Yoshioka, Toshihiko Kaji, Masahiro Hiramoto

APPLIED PHYSICS EXPRESS   7 ( 7 )   2014.7

Pn-homojunction organic solar cells formed in phase-separated co-deposited films Reviewed

Masayuki Kubo, Toshihiko Kaji, Masahiro Hiramoto

Applied Physics Letters   103 ( 26 )   2013.12

Conjugated organic framework with three-dimensionally ordered stable structure and delocalized pi clouds Reviewed

Jia Guo, Yanhong Xu, Shangbin Jin, Long Chen, Toshihiko Kaji, Yoshihito Honsho, Matthew A. Addicoat, Jangbae Kim, Akinori Saeki, Hyotcherl Ihee, Shu Seki, Stephan Irle, Masahiro Hiramoto, Jia Gao, Donglin Jiang

NATURE COMMUNICATIONS   4   2013.11

Evaluation of Barrier Width by Low-Frequency Capacitance Measurements for MoO3-doped p-Type C-60 Films Reviewed

Tadashi Yoshioka, Masayuki Kubo, Norihiro Ishiyama, Toshihiko Kaji, Masahiro Hiramoto

MOLECULAR CRYSTALS AND LIQUID CRYSTALS   579 ( 1 )   1 - 4   2013.9

Tandem organic solar cells formed in co-deposited films by doping Reviewed

Norihiro Ishiyama, Masayuki Kubo, Toshihiko Kaji, Masahiro Hiramoto

ORGANIC ELECTRONICS   14 ( 7 )   1793 - 1796   2013.7

Double Co-deposited Layered Organic Photovoltaic Cells with Sensitivity from Visible to Near-Infrared Regions Reviewed

Kazuya Yokoyama, Toshihiko Kaji, Masahiro Hiramoto

JAPANESE JOURNAL OF APPLIED PHYSICS   52 ( 4 )   2013.4

Improvement of Photovoltaic Characteristics by MoO3 Doping of Thick Hole-Transporting Films Reviewed

Yusuke Shinmura, Masayuki Kubo, Toshihiko Kaji, Masahiro Hiramoto

JAPANESE JOURNAL OF APPLIED PHYSICS   52 ( 4 )   2013.4

Junction Formation by Doping in H2Pc:C-60 Co-Evaporated Films for Solar Cell Application Reviewed

Masayuki Kubo, Yusuke Shinmura, Norihiro Ishiyama, Toshihiko Kaji, Masahiro Hiramoto

MOLECULAR CRYSTALS AND LIQUID CRYSTALS   581 ( 1 )   13 - 17   2013.1

Tuning of barrier parameters of n-type schottky junctions in photovoltaic co-deposited films by doping Reviewed

Norihiro Ishiyama, Tadashi Yoshioka, Toshihiko Kaji, Masahiro Hiramoto

Applied Physics Express   6 ( 1 )   2013.1

Effect of co-evaporant induced crystallization on needle growth of phthalocyanine thin films Reviewed

Toshihiko Kaji, Satoru Nakao, Masahiro Hiramoto

Molecular Crystals and Liquid Crystals   578 ( 1 )   63 - 67   2013

Tandem photovoltaic cells formed in single fullerene films by impurity doping Reviewed

Norihiro Ishiyama, Masayuki Kubo, Toshihiko Kaji, Masahiro Hiramoto

APPLIED PHYSICS LETTERS   101 ( 23 )   2012.12

Invertible Organic Photovoltaic Cells with Heavily Doped Organic/Metal Ohmic Contacts Reviewed

Masayuki Kubo, Yusuke Shinmura, Norihiro Ishiyama, Toshihiko Kaji, Masahiro Hiramoto

APPLIED PHYSICS EXPRESS   5 ( 9 )   2012.9

pn-control and pn-homojunction formation of metal-free phthalocyanine by doping Reviewed

Yusuke Shinmura, Masayuki Kubo, Norihiro Ishiyama, Toshihiko Kaji, Masahiro Hiramoto

AIP ADVANCES   2 ( 3 )   2012.9

Recent Progress in Organic Thin-Film Solar Cells Reviewed

Masahiro Hiramoto

2012 19TH INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES (AM-FPD): TFT TECHNOLOGIES AND FPD MATERIALS   71 - 74   2012

Doping-based control of the energetic structure of photovoltaic co-deposited films Reviewed

Norihiro Ishiyama, Masayuki Kubo, Toshihiko Kaji, Masahiro Hiramoto

APPLIED PHYSICS LETTERS   99 ( 13 )   2011.9

pn-homojunction formation in single fullerene films Reviewed

Masayuki Kubo, Toshihiko Kaji, Masahiro Hiramoto

AIP ADVANCES   1 ( 3 )   2011.9

Co-evaporant Induced Crystalline Donor: Acceptor Blends in Organic Solar Cells Reviewed

Toshihiko Kaji, Minlu Zhang, Satoru Nakao, Kai Iketaki, Kazuya Yokoyama, Ching W. Tang, Masahiro Hiramoto

ADVANCED MATERIALS   23 ( 29 )   3320 - +   2011.8

Conduction-type control of fullerene films from n- to p-type by molybdenum oxide doping Reviewed

Masayuki Kubo, Kai Iketaki, Toshihiko Kaji, Masahiro Hiramoto

APPLIED PHYSICS LETTERS   98 ( 7 )   2011.2

Near infrared light driven organic p-i-n solar cells incorporating phthalocyanine J-aggregate Reviewed

Masahiro Hiramoto, Keitaro Kitada, Kai Iketaki, Toshihiko Kaji

APPLIED PHYSICS LETTERS   98 ( 2 )   2011.1

Structural studies of the codeposited i-layer of ZnPc:C-60 p-i-n solar cells Reviewed

Kai Iketaki, Toshihiko Kaji, Satoru Nakao, Masahiro Hiramoto

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8, NO 2   8 ( 2 )   2011

Morphology of Rare-earth (Y, Sm) Nanostructures Synthesized by the Surfactant-assembled Method Reviewed

Katsura Nishiyama, Takashi Hanamoto, Hirotake Shigematsu, Keitaro Kitada, Kai Iketaki, Toshihiko Kaji, Masahiro Hiramoto

CHEMISTRY LETTERS   39 ( 9 )   974 - 975   2010.9

One Month Continuous Operation of Organic p-i-n Solar Cells Covered with a Zinc Oxide Protection Layer Reviewed

Masahiro Hiramoto, Hiroki Shiokawa

APPLIED PHYSICS EXPRESS   3 ( 8 )   2010.8

Efficient Organic p-i-n Solar Cells Having Very Thick Codeposited i-Layer Consisting of Highly Purified Organic Semiconductors Reviewed

Kazuya Sakai, Masahiro Hiramoto

MOLECULAR CRYSTALS AND LIQUID CRYSTALS   491   284 - 289   2008

Nanostructure Control by Interlaminated Fullerene/Phthalocyanine Ultrathin Films in p-i-n Organic Solar Cells Reviewed

Hiroki Shiokawa, Masahiro Hiramoto

MOLECULAR CRYSTALS AND LIQUID CRYSTALS   491   277 - 283   2008

Long-term operation tests of organic solid-state solar cells Reviewed

Hiroki Shiokawa, Masaaki Yokoyama, Masahiro Hiramoto

SURFACE REVIEW AND LETTERS   14 ( 4 )   539 - 542   2007.8

Formation of ohmic contacts to naphthalene tetracarboxylic anhydride films Reviewed

Kok Wei Yee, Kouji Suemori, Masaaki Yokoyama, Masahiro Hiramoto

MOLECULAR CRYSTALS AND LIQUID CRYSTALS   462   45 - 50   2007.1

Formation of ohmic contacts to organic semiconductor films Reviewed

Masahiro Hiramoto, Yee Kok Wei, Kouji Suemori, Masaaki Yokoyama

MOLECULAR CRYSTALS AND LIQUID CRYSTALS   455   333 - 338   2006

P-I-N junction organic solar cells Reviewed

Masahiro Hiramoto, Kouji Suemori, Yoshio Matsumura, Takahiro Miyata, Masaaki Yokoyama

MOLECULAR CRYSTALS AND LIQUID CRYSTALS   455   267 - 275   2006

Design of nanostructure for organic EL by vertical superlattice Reviewed

Masahiro Hiramoto, Mari Danno, Masaaki Yokoyama

KOBUNSHI RONBUNSHU   63 ( 10 )   670 - 674   2006

Design of nanostructure for photoelectric conversion by vertical organic superlattice Reviewed

Masahiro Hiramoto

ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS   89 ( 11 )   13 - 18   2006

New Optoelectronic Devices using Organic EL

Functional Molecular Materials and New Devices  1994 

有機ELの新展開

有機EL素子開発戦略  1992 

New Development of Organic EL

Developing Strategy of Organic EL Device  1992 

Photocurrent multipluation at organic/metal interface and surface morphology of organic films

Applied Physics Letters   87 ( 7 )   3365 - 3369   2000

A high-speed photocurrent multiplication deuice based on an orgauic double-layered stracture

Applied Physics Letters   76 ( 9 )   1194 - 1196   2000

Direct Measurement of internal potential distillation in Organic Electrolumiuescent diodes during operation

Applied Physics Letters   76 ( 10 )   1336 - 1338   2000

Direct Tracing of the Photocurrent Multiplication Process in at Organic Pigment Film

Journal of Applied Physics   84 ( 11 )   6154 - 6156   1998

Phococurvent Multiplication Phenomen a at Organic/Metal and Organic/Organic Interfaces

Thin Soliol Filus   331   71 - 75   1998

Photocument Multiplication at Organic/Metal Interface and Morphology of Metal Filus

Japanese Journal of Applied Physics   37   L1184-186   1998

Field-actiuated Structural Traps at Orgenics Pigment/Metal Interfaces Causing Photocurront Multiplication Pheuomena

Applied Physics Letters   73 ( 18 )   2627 - 2629   1998

Photocurrent multiplication phenomenon at organic/organic heterojunction and application to optical computing device combining with organic electroluminescence

M Hiramoto, H Kumaoka, M Yokoyama

SYNTHETIC METALS   91 ( 1-3 )   77 - 79   1997.12

Photocurrent multiplication in naphthalene tetracarboxylic anhydride film at room temperature

Tadashi Katsume, Masahiro Hiramoto, Masaaki Yokoyama

Applied Physics Letters   69 ( 24 )   3722 - 3724   1996.12

Aiming at Higher Sensitinity : Photocurrent Multiplication Phenomeuon and Its Application

Masahiro HIRAMOTO

Denshishashin   35 ( 4 )   344 - 349   1996

高感度化を目指して:光電流増倍現象とその応用

電子写真学会誌   35 ( 4 )   344 - 349   1996

Photoinduced Hole Injection Multiplication in p-type Quinacridone Piqment Films

Japanese Journal of Applied Physics   35 ( 3A )   L349 - L351   1996

Palternecl Emission in Organic Electrolumines cent Deuice Using Photo decomposition of Polysilave Film by VV Light

Hiramoto Masahiro, Sakata Yoshimasa, Yokoyama Masaaki

Jpn. J. Appl. Phys.   35 ( 9A )   4809 - 4812   1996

有機多層薄膜構造を持つ光増幅デバイス

応用物理   64 ( 10 )   1036   1995

A light amplification device with multilayered structure of organic thin films

OYO BUTSURI   64 ( 10 )   1036   1995

Conduction Type Control from n-to p-type for Organic Piqmant Film Purifiedby Reactive

Journal of Applied Physics   78 ( 12 )   7153 - 7157   1995

PHOTOCURRENT MULTIPLICATION IN ORGANIC PIGMENT FILMS

M HIRAMOTO, T IMAHIGASHI, M YOKOYAMA

APPLIED PHYSICS LETTERS   64 ( 2 )   187 - 189   1994.1

Light Amplification in a New Light Transducer Combining an Organic Electroluminescent Diode with Photoresponsive Organic Pigment Film

Masahiro Hiramoto, Tadashi Katsume, Masaaki Yokoyama

Optical Review   1 ( 1 )   82 - 84   1994

Extrinsic Carrier Photogeveration in Organic Pigmeuts and Electric-field induced Flooresceuce Quenching

Masahiro Hiramoto, Yoshitaka Sakaue, Masaaki Yokoyama

Bulletin of the Chemical Society of Japan   67 ( 8 )   2011 - 2016   1994

PHOTOCURRENT MULTIPLICATION IN AMORPHOUS-SILICON CARBIDE FILMS

M HIRAMOTO, K YOSHIMURA, M YOKOYAMA

JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY   37 ( 2 )   192 - 196   1993.3

Directed Beam Emission from Edge in Organic Electroluminescent Diode

Applied Physics Letters   62 ( 7 )   666 - 668   1993

ORGANIC SOLAR-CELL BASED ON MULTISTEP CHARGE SEPARATION SYSTEM

M HIRAMOTO, H FUKUSUMI, M YOKOYAMA

APPLIED PHYSICS LETTERS   61 ( 21 )   2580 - 2582   1992.11

PHOTOMODULATION OF PHOTOCURRENT MULTIPLICATION IN A HIGH-GAIN AMORPHOUS-SILICON CARBIDE FILM

M HIRAMOTO, K YOSHIMURA, M YOKOYAMA

APPLIED PHYSICS LETTERS   60 ( 9 )   1102 - 1104   1992.3

PHOTO-MODULATION OF LIGHT UP-CONVERSION IN LIGHT TRANSDUCER USING HIGH-GAIN PHOTORESPONSIVE AMORPHOUS-SILICON CARBIDE COMBINED WITH ORGANIC ELECTROLUMINESCENT DIODE

M HIRAMOTO, K YOSHIMURA, M YOKOYAMA

APPLIED PHYSICS LETTERS   60 ( 3 )   324 - 325   1992.1

p-i-n Like Behavior in Three-layered Organic Solar Cells Having a Co-deposited Interlayer of Pigments

J. Applid Physics   72 ( 8 )   3781 - 3787   1992

Carrier Generation in Organic Pigment Films and Microwave Photoconductivity

J. of the Chemical Society of Japan   1992 ( 10 )   1180 - 1185   1992

有機顔料薄膜におけるキャリヤー生成とマイクロ波光電導

日本化学会誌   1992 ( 10 )   1180 - 1185   1992

UP-CONVERSION OF RED-LIGHT TO GREEN BY A NEW TYPE OF LIGHT TRANSDUCER USING ORGANIC ELECTROLUMINESCENT DIODE COMBINED WITH PHOTORESPONSIVE AMORPHOUS-SILICON CARBIDE

M HIRAMOTO, K YOSHIMURA, T MIYAO, M YOKOYAMA

APPLIED PHYSICS LETTERS   58 ( 11 )   1146 - 1148   1991.3

Three-layered Organic Solar Cell with a Photoactive Interlayer of Codeposited Pigments

Applied Physics Letters   58 ( 10 )   1062 - 1064   1991

Photocurrent Multiplication in Amorphous Silicon Carbide Films

Appl. Phys. Lett   59 ( 16 )   1992 - 1994   1991

An Ultramicrostractured Photoelectrode System Composed of TiO₂ Single Crystal and Layered SiO₂ and pt Thin Film

Chemistry Letters   1990,1343-1346   1990

Doping Effect on the Two-layer Organic Solar Cell

Chemistry Letters   1990,119-122   1990

ELECTRON-TRANSFER AND PHOTOLUMINESCENCE DYNAMICS OF CDS PARTICLES DEPOSITED ON POROUS VYCOR GLASS

M HIRAMOTO, K HASHIMOTO, T SAKATA

CHEMICAL PHYSICS LETTERS   133 ( 5 )   440 - 444   1987.1

Visible-Light Induced Water Splitting on New Semiconductor Electrodes Made by Photolithography

Chemistry Letters   1986,899-902   1986

ESCA AND PHOTOELECTROCHEMICAL STUDIES OF P-N-JUNCTION SILICON ELECTRODES PROTECTED BY PLATINUM DEPOSITION FOR USE IN SOLAR-ENERGY CONVERSION

Y NAKATO, M HIRAMOTO, Y IWAKABE, H TSUBOMURA

JOURNAL OF THE ELECTROCHEMICAL SOCIETY   132 ( 2 )   330 - 334   1985

有機太陽電池のためのバンドギャップサイエンス

2009 - 2015

科学技術振興機構（JST）  戦略的創造研究推進事業(CREST) 

平本 昌宏

有機半導体のイレブンナイン超高純度化による１０％効率有 機薄膜太陽電池の開発

2009 - 2012

日本学術振興会  科研費 基盤B 

平本 昌宏

直立超格子ナノ構造を組み込んだ高効率有機太陽電池

2009 - 2010

日本学術振興会  科研費 挑戦的萌芽 

平本 昌宏

有機、無機半導体の光電物性に関する研究

その他の研究制度 

Study on Photo-electric Properties of organic and inorganic semiconductors

The Other Research Programs