Fabrication of high performance organic devices based on π-space formation

2012 Fiscal Year Final Research Report

• Project Area: Emergence of highly elaborated pai-space and its function
• Project/Area Number: 20108012
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Japan Advanced Institute of Science and Technology
• Principal Investigator: MURATA Hideyuki 北陸先端科学技術大学院大学, マテリアルサイエンス研究科, 教授 (10345663)
• Project Period (FY): 2008 – 2012
• Keywords: 有機薄膜太陽電池 / 有機EL 素子 / 光誘起誘電率変化 / エレクトロスピンニング / トランジスタ型不揮発性メモリ / 濃度傾斜構造 / エネルギー分散型X 線分析

Research Abstract

In this study, we have developed a simple method based on self-organized phase segregation between two polymers, namely P3HT and polystyrene (PS), to produce nanoporous P3HT thin films. We also have found that rubbing the P3HT layer prior to PCBM deposition induces major morphological changes in the active layer and results in the formation of an ideal vertical donor-acceptor concentration gradient. The combination of these two major morphological changes leads to the fabrication of high performances solar cells which exhibit, to date, the record efficiencies for spin coated graded bilayers solar cells.

Research Products

• [Journal Article] Molecular orientation induced by high-speed substrate transfer during vacuum vapor deposition of organic films (2012)
  • Author(s): T. Matsushima, H. Murata
  • Journal Title: Organic Electronics Volume: 13 Pages: 222-229
  • Peer Reviewed
• [Journal Article] True photo-luminescence spectra revealed in electrospun light-emitting single nanofibers (2012)
  • Author(s): Y. Ishii, H. Murata
  • Journal Title: J. Mater. Chem Volume: 22 Pages: 4695-4703
  • Peer Reviewed
• [Journal Article] Molecular order, charge injection efficiency and the role of intramolecular polar bonds at organic/organic heterointerfaces (2012)
  • Author(s): Y. Wang, T. Matsushima, H. Murata, A. Fleurence, Y. Yamada-Takamura, R. Friedlein
  • Journal Title: Organic Electronics Volume: 13 Pages: 1853-1858
  • Peer Reviewed
• [Journal Article] Enhancement of hole injection and electroluminescence characteristics by a rubbing-induced lying orientation of alpha-sexithiophene (2012)
  • Author(s): T. Matsushima, H. Murata
  • Journal Title: J. Appl. Phys Volume: 112 Pages: 024503 (9 pages)
  • Peer Reviewed
• [Journal Article] Enhanced Vertical Concentration Gradient in Rubbed P3HT:PCBM Graded Bilayer Solar Cells (2012)
  • Author(s): V. Vohra, G. Arrighetti, L. Barba, K. Higashimine, W. Porzio, H. Murata
  • Journal Title: J. Phys. Chem. Lett Volume: 3 Pages: 1820-1823
  • Peer Reviewed
• [Journal Article] Evaluation of Organic Thin Film Solar Cells Using 3-Diode Equivalent Circuit Model with Inverted Diode (2012)
  • Author(s): Y. Sakurada, Y. Ota, H. Watanabe, H. Murata, K. Nishioka
  • Journal Title: Materials Science Forum Volume: 725 Pages: 179-182
  • Peer Reviewed
• [Journal Article] Organic Solar Cells Based on Nanoporous P3HT Obtained from Self Assembled P3HT:PS Templates (2012)
  • Author(s): V. Vohra, M. Campoy-Quiles, M. Garriga, H. Murata
  • Journal Title: J. Mater. Chem Volume: 22 Pages: 20017-20025
  • Peer Reviewed
• [Journal Article] Highly stable fullerene memory transistors with an electron-trapping polymer (2012)
  • Author(s): T. T. Dao, T. Matsushima, H. Murata
  • Journal Title: Organic Electronics Volume: 13 Pages: 2709-2715
  • Peer Reviewed
• [Journal Article] Electroconductive・-Junction Au Nanoparticles (2012)
  • Author(s): M. Kanehara, J. Takeya, T. Uemura, H. Murata, K. Takimiya, H. Sekine, T. Teranishi
  • Journal Title: Bull. Chem. Soc. Jpn Volume: 85 Pages: 957-961
  • Peer Reviewed
• [Journal Article] Addition of Regiorandom P3HT to Solution Processed P3HT:PCBM Graded Bilayers to Tune the Vertical Concentration Gradient (2012)
  • Author(s): V. Vohra, K. Higashimine, T. Murakami, H. Murata
  • Journal Title: Appl. Phys. Lett Volume: 101 Pages: 173301 (4 pages)
  • Peer Reviewed
• [Journal Article] Optical, morphological, electrical & electroluminescence characteristics of organic semiconductor films prepared at various deposition rates (2011)
  • Author(s): T. Matsushima, K. Shiomura, S. Naka, H. Murata
  • Journal Title: Thin Solid Films Volume: 520 Pages: 2283-2288
  • Peer Reviewed
• [Journal Article] Improved initial drop in operational lifetime of blue phosphorescent organic light emitting device fabricated under ultra high vacuum condition (2011)
  • Author(s): H. Yamamoto, J. Brooks, M. S. Weaver, J. J. Brown, T. Murakami, H. Murata
  • Journal Title: Appl. Phys. Lett Volume: 99 Pages: 033301 (3 pages)
  • Peer Reviewed
• [Journal Article] Electroluminescence from Conjugated Polymer Electrospun Nanofibers in solution processable OLEDs (2011)
  • Author(s): V. Vohra, U. Giovanella, R. Tubino, H. Murata, C. Botta
  • Journal Title: ACS Nano Volume: 5 Pages: 5572-5578
  • Peer Reviewed
• [Journal Article] Enhanced charge.carrier injection caused by molecular orientation (2011)
  • Author(s): T. Matsushima, H. Murata
  • Journal Title: Appl. Phys. Lett Volume: 98 Pages: 253307 (3pages)
  • Peer Reviewed
• [Journal Article] Fabrication of a submicron-channel organic field-effect transistor using a controllable electrospun single fiber as a shadow mask (2011)
  • Author(s): Y.Ishii, H. Sakai, H. Murata
  • Journal Title: Nanotechnology Volume: 22 Pages: 205202-205207
  • Peer Reviewed
• [Journal Article] Interfacial charge transfer and charge generation in organic electronic devices (2011)
  • Author(s): T. Matsushima, G.-H. Jin, Y. Kanai, T. Yokota, S. Kitada, T. Kishi, H. Murata
  • Journal Title: Organic Electronics Volume: 12 Pages: 520-528
  • Peer Reviewed
• [Journal Article] High electron mobility layers of triazines for improving driving voltages,power conversion efficiencies, operational stability of organic light-emitting diodes (2010)
  • Author(s): T. Matsushima, M. Takamori, Y. Miyashita, Y. Honma, T. Tanaka,H. Aihara, H. Murata
  • Journal Title: Organic Electronics Volume: 11 Pages: 16-22
  • Peer Reviewed
• [Journal Article] Adsorption state of 4,4"-diamino-p-terphenyl through an amino group bound to Si(111)-7×7 surface examined by X-ray photoelectron spectroscopy and scanning tunneling microscopy (2010)
  • Author(s): T. Nishimura, A. Itabashi, A. Sasahara, H. Murata, T. Arai, M. Tomitori
  • Journal Title: J. Phys. Chem. C Volume: 114 Pages: 11109-11114
  • Peer Reviewed
• [Journal Article] Synthesis, characterization, and OLED application of oligo(p-phenylene ethynylene)s with polyhedral oligomeric silsesquioxanes (POSS) as pendant groups (2010)
  • Author(s): V. Ervithayasuporn, J. Abe, X. Wang, T. Matsushima, H. Murata, Y. Kawakami
  • Journal Title: Tetrahedron Volume: 66 Pages: 9348-9355
  • Peer Reviewed
• [Journal Article] Optical second harmonic generation at heterojunction interfaces of a molybdenum trioxide layer and an organic layer (2010)
  • Author(s): A. B. EL Basaty, Y. Miyauchi, G. Mizutani, T. Matsushima, H. Murata
  • Journal Title: Appl. Phys. Lett Volume: 97 Pages: 193302
  • Peer Reviewed
• [Journal Article] Photoinduced change of dielectric permittivity in molecular doped polymer layer (2009)
  • Author(s): H. Sakai, H. Murata, M. Murakami K. Ohkubo, S. Fukuzumi
  • Journal Title: Appl. Phys. Lett Volume: 95 Pages: 252901
  • Peer Reviewed
• [Journal Article] Observation of space-charge-limited current due to charge generation at interface of molybdenum dioxide and organic layer (2009)
  • Author(s): T. Matsushima, H. Murata
  • Journal Title: Appl. Phys. Lett Volume: 95 Pages: 203306 (3 pages)
  • Peer Reviewed
• [Journal Article] Enhanced performance of organic light-emitting diodes by inserting wide-energy-gap interlayer between hole-transport layer and light-emitting layer (2009)
  • Author(s): Y. Honda, T. Matsushima, H. Murata
  • Journal Title: Thin Solid Films Volume: 518 Pages: 545-547
  • Peer Reviewed
• [Journal Article] An organic nonvolatile memory using space charge polarization of a gate dielectric (2009)
  • Author(s): K. Konno, H. Sakai, T. Matsushima, H. Murata
  • Journal Title: Thin Solid Films Volume: 518 Pages: 534-536
  • Peer Reviewed
• [Journal Article] Control of threshold voltage of organic field-effect transistors by space charge Polarization (2009)
  • Author(s): H. Sakai, K. Konno, H. Murata
  • Journal Title: Thin Solid Films Volume: 518 Pages: 510-513
  • Peer Reviewed
• [Journal Article] Fabrication of submicron patterned electrodes using a single electrospun fiber as a shadow-mask (2009)
  • Author(s): Y. Ishii, H. Sakai, H. Murata
  • Journal Title: Thin Solid Films Volume: 518 Pages: 647-650
  • Peer Reviewed
• [Journal Article] Ternary mixing: A simple method to tailor the morphology of organic solar cells (2009)
  • Author(s): M. Campoy-Quiles, Y. Kanai, A. El-Basaty, H. Sakai, H. Murata
  • Journal Title: Organic Electronics Volume: 10 Pages: 1120-1132
  • Peer Reviewed
• [Journal Article] Long-lived exciplex formation and delayed exciton emission in bulkheterojunction blends of silole derivative and polyfluorene copolymer: The role of morphology on exciplex formation and charge separation (2009)
  • Author(s): J. J. Benson-Smith, J. Wilson, C. Dyer-Smith, K. Mouri, S. Yamaguchi, H. Murata, J. Nelson
  • Journal Title: J. Phys. Chem. B Volume: 113 Pages: 7794-7799
  • Peer Reviewed
• [Journal Article] Tuning of threshold voltage of organic field-effect transistors by space charge polarization (2009)
  • Author(s): H. Sakai, K. Konno, H. Murata
  • Journal Title: Appl. Phys. Lett Volume: 94 Pages: 073304 (3 pages)
  • Peer Reviewed
• [Journal Article] Immobilization of aromatic aldehyde molecules on indium tin oxide surface using acetalization reaction (2009)
  • Author(s): T. Nakayama, T. Matsushima, H. Murata
  • Journal Title: Thin Solid Films Volume: 518 Pages: 739-742
  • Peer Reviewed
• [Journal Article] Improvement of stability for organic solar cells by using molybdenum trioxide buffer layer (2009)
  • Author(s): Y. Kanai, T. Matsushima, H. Murata
  • Journal Title: Thin Solid Films Volume: 518 Pages: 537-540
  • Peer Reviewed
• [Presentation] Observation of Vertical Phase Segregation in Bulk Heterojunction Organic Solar Cells by Using Electron Dispersive X-ray Spectroscopy(EDS) (2013)
  • Author(s): N. T. Razali, V. Vohra, K. Higashimine, N. Otsuka and H. Murata
  • Organizer: 第60回 応用物理学会春季学術講演会
  • Place of Presentation: 神奈川
  • Year and Date: 20130327-30
• [Presentation] Graded Bilayer Organic Solar Cells:An opportunity to process P3HT independently of PCBM (2013)
  • Author(s): V. Vohra, H. Murata, K. Higashimine, M.Campoy-Quiles, M. Garriga, W. Porzio, M. Arrighetti, L. Barba
  • Organizer: The Sixth Advanced Materials and Nanotechnology Conference (AMN6)
  • Place of Presentation: Auckland, New Zealand
  • Year and Date: 20130211-15
• [Presentation] Tuning the Vertical Concentration Gradient in P3HT:PCBM Graded Bilayer Solar Cells by Adding Regiorandom P3HT (2012)
  • Author(s): V. Vohra, K. Higashimine, H. Murata
  • Organizer: The 10th International Conference on Nano-molecular Electronics
  • Place of Presentation: 兵庫
  • Year and Date: 20121212-14
• [Presentation] Enhanced Efficiency of Graded Bilayer P3HT/PCBM Solar Cells by Morphological Control of Intermixed Layer (2012)
  • Author(s): V. Vohra, K. Higashimine, H. Murata, M. Campoy-Quiles, M. Garriga, G. Arrighetti, L. Barba, W. Porzio
  • Organizer: The 10th International Conference on Nano-molecular Electronics
  • Place of Presentation: 兵庫
  • Year and Date: 20121212-14
• [Presentation] True photoluminescence spectra revealed in electrospun light-emitting single nanofibers and their evaluation (2012)
  • Author(s): Y. Ishii, H. Murata, M. Fukuda
  • Organizer: Material Research Society 2012 Fall Meeting
  • Place of Presentation: Boston, USA
  • Year and Date: 20121125-30
• [Presentation] Enhancement of Photovoltaic Performances in Phase Separated Nanostructured Organic Devices (2012)
  • Author(s): V. Vohra, M. Campoy-Quiles, M. Garriga, H. Murata
  • Organizer: International Conference on Surfaces, Coatings and Nanostructured Materials (NANOSMAT-USA)
  • Place of Presentation: Florida, USA
  • Year and Date: 20120327-30
• [Presentation] Enhanced Power Conversion Efficiency by Tuning the Vertical Concentration Gradient in P3HT:PCBM Bilayer Solar Cells (2012)
  • Author(s): H. Murata
  • Organizer: OIST International Symposium on Organic Electronics
  • Place of Presentation: 沖縄
  • Year and Date: 2012-10-05
• [Presentation] 分子配向制御による有機薄膜太陽電池の性能向上 (2012)
  • Author(s): 村田英幸,松島敏則,Varun Vohra
  • Organizer: 有機・無機エレクトロニクスシンポジウム
  • Place of Presentation: 富山
  • Year and Date: 2012-06-29
• [Presentation] Highly Efficient Polymer Light-Emitting Diodes Realized by Triplet-Triplet Annihilation (2011)
  • Author(s): H. Murata, J. Abe
  • Organizer: The 219th ECS Meeting
  • Place of Presentation: Montreal, Canada
  • Year and Date: 20110501-06
• [Presentation] Highly Efficient Polymer Light-Emitting Diodes Using Polymer Blend Emission Layers (2011)
  • Author(s): H. Murata, and J. Abe
  • Organizer: The 3rd Annual CNSI-JAIST Workshop2011
  • Place of Presentation: Los Angels, USA
  • Year and Date: 20110113-14
• [Presentation] Enhanced carrier injection and stability of OLED due to molecular orientation at organic/organic interface (2011)
  • Author(s): H. Murata
  • Organizer: International Workshop on OrganicElectronics
  • Place of Presentation: Seoul, Korea
  • Year and Date: 2011-08-30
• [Presentation] 機能性ゲート絶縁層を用いた不揮発性有機メモリー (2011)
  • Author(s): 村田英幸、矢島覚、今野広大、酒井平祐
  • Organizer: 第75回半導体・集積回路技術シンポジウム
  • Place of Presentation: 東京
  • Year and Date: 2011-07-08
• [Presentation] Highly Oriented π-Conjugated Polymer Chains in Electrospun Nanofiber (2010)
  • Author(s): H. Murata
  • Organizer: International Symposium on Advanced Soft Materials
  • Place of Presentation: 熊本
  • Year and Date: 20101126-27
• [Presentation] Highly Efficient Polymer Light-Emitting Diodes realized by Triplet-Triplet Annihilation (2010)
  • Author(s): H. Murata
  • Organizer: The Asian Conference on Organic Electronics (A-COE 2010) & the Asian Symposium on Organic Materials for Electronics and Photonics (ASOMEP 2010)
  • Place of Presentation: Seoul、 Korea
  • Year and Date: 20101103-05
• [Presentation] Highly Efficient Polymer Light-Emitting Diodes Realized by Triplet annihilation (2010)
  • Author(s): H. Murata,J. Abe
  • Organizer: The 7th International Symposium on Advanced Materials in Asia-Pacific, JAIST International Symposium on Nano Technology 2010
  • Place of Presentation: 石川
  • Year and Date: 20100930-1001
• [Presentation] Enhancing Open-Circuit Voltage in Organic Solar Cells by Interface Engineering (2010)
  • Author(s): H. Murata, Y. Kinoshita, T. Matsushima
  • Organizer: Material Research Society 2010 SpringMeeting
  • Place of Presentation: San Francisco、 USA
  • Year and Date: 20100404-10
• [Presentation] 空間電荷分極を利用した不揮発性有機メモリー (2010)
  • Author(s): 村田英幸
  • Organizer: 電子情報通信学会 有機エレクトロニクス研究会
  • Place of Presentation: 東京
  • Year and Date: 2010-07-12
• [Presentation] Highly Oriented MEH-PPV/ Polyethyleneoxide Nanofibers Fabricated by Electrospinning Method (2009)
  • Author(s): H. Murata
  • Organizer: The 1st International Symposium on Emergence of Highly Elaborated・-space and its Function
  • Place of Presentation: Osaka
  • Year and Date: 20091218-19
• [Presentation] Impact of Interface Engineering on Device Performance in Organic Electronic Devices (2009)
  • Author(s): H. Murata
  • Organizer: Workshop on Molecular/Organic Devices including Electronic Devices, OPVs, and Sensors
  • Place of Presentation: Amritsar、India
  • Year and Date: 20090922-25
• [Book] 「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 (2013)
  • Author(s): 村田英幸
  • Total Pages: 183-186
  • Publisher: シーエムシー出版
• [Book] 「有機 EL技術体系」第 1章 有機 ELの基礎 (2012)
  • Author(s): 村田英幸
  • Total Pages: 10-25
  • Publisher: グローバルネット
• [Patent(Industrial Property Rights)] 光電変換装置を生産する方法、光電変換装置及び光電変換装置の製造装置 (2012)
  • Inventor(s): 村田英幸、松島敏則
  • Industrial Property Rights Holder: 国立大学法人北陸先端科学技術大学院大学
  • Industrial Property Number: 特許権、特願2012-041906
  • Filing Date: 2012-02-28
• [Patent(Industrial Property Rights)] 光照射によって誘電率が変化する膜およびそれを用いた電子デバイス発明者 (2009)
  • Inventor(s): 村田英幸、酒井平祐、福住俊一、大久保敬、村上元信
  • Industrial Property Rights Holder: 国立大学法人北陸先端科学技術大学院大学、国立大学法人大阪大学
  • Industrial Property Number: 特許権、特願 2009-205923
  • Filing Date: 2009-09-07