Realization of Organic EL Devices without ITO Transparent Electrodes

• Project/Area Number: 20613009
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Element strategy
• Research Institution: Kobe University
• Principal Investigator: HAYASHI Shinji Kobe University, 大学院・工学研究科, 教授 (50107348)
• Co-Investigator(Kenkyū-buntansha): FUJII Minoru 神戸大学, 大学院・工学研究科, 教授 (00273798)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 有機分子 / 蛍光 / 表面プラズモン / 金属 / 多層膜 / 有機EL / ITO / MIM構造 / 蛍光増強 / Purcell効果

Research Abstract

In order to realize organic light emitting devices without transparent ITO electrodes, experimental and theoretical studies were performed. Metal-Insulator-Metal (MIM) structures having an organic light emitting layer at the center of the structures were prepared and their emission properties were measured. An intensity enhancement of ~25 was observed in good agreement with theoretical estimates. The intensity enhancement can be well explained in terms of light emission mediated by symmetric surface plasmon polaritons in the MIM structure. Results of simulations for realistic light emitting devices indicate that the light-extraction efficiency is greatly enhanced when an ITO electrode is replaced by an Ag electrode. The present results suggest that organic light emitting devices with high efficiencies can be constructed without ITO electrodes.

Research Products

• [Journal Article] (今さら聞けない?基礎中の基礎)表面プラズモンとは? (2011)
  • Author(s): 林真至
  • Journal Title: 応用物理 80, 1 Pages: 66-70
  • Peer Reviewed
• [Journal Article] Resonant photon transport through metal-insulator-metal multilayers consisting of Ag and SiO2 (2010)
  • Author(s): Maiko Yoshida, Satoshi Tomita, HisaoYanagi, Shinji Hayashi
  • Journal Title: Physical Review B Vol.82
  • NAID: 120005716664
  • Peer Reviewed
• [Journal Article] Mechanism of Enhanced Light Emission from an Emitting Layer Embedded in Metal-Insulator-Metal Structures (2010)
  • Author(s): Shinji Hayashi, Akimichi Maekawa, Suk Chan Kim, Minoru Fujii
  • Journal Title: Physical Review B Vol.82, Issue3
  • Peer Reviewed
• [Journal Article] Mechanism of enhanced light emission from an emitting layer embedded in metal-insulator-metal structures (2010)
  • Author(s): Shinji Hayashi
  • Journal Title: Physical Review B Volume: 82
  • Peer Reviewed
• [Journal Article] Resonant photon transport through metal-insulator-metal multilayers consisting of Ag and SiO_2 (2010)
  • Author(s): Maiko Yoshida
  • Journal Title: Physical Review B Volume: 82
  • Peer Reviewed
• [Journal Article] Quenching-free Fluorescence Enhancement on Nonmetallic Particle Layers : Rhodamine B on GaP Particle Layers (2009)
  • Author(s): Shinji Hayashi, Yohei Takeuchi, Shinichi Hayashi, Minoru Fujii
  • Journal Title: Chemical Physics Letters Vol.480 Pages: 100-104
  • Peer Reviewed
• [Journal Article] Anisotropic Propagation of Surface Plasmon Polaritons Caused by Oriented Molecular Overlayer (2009)
  • Author(s): Fadiah Adlina M.Ghazali, Minoru Fujii, Shinji Hayashi
  • Journal Title: Applied Physics Letters Vol.95
  • NAID: 120001478942
  • Peer Reviewed
• [Journal Article] Enhancement of Photoluminescence from Silicon Nanocrystals by Metal Nanostructures made by Nanosphere Lithography (2009)
  • Author(s): Yugo Mochizuki, Minoru Fujii, Shinji Hayashi, Takaaki Tsuruoka, Kensuke Akamatsu
  • Journal Title: Journal of Applied Physics Vol.106
  • Peer Reviewed
• [Journal Article] Photoluminescence from Donor-Acceptor Molecular Systems via Long Distance Energy Transfer Mediated by Surface Plasmons (2009)
  • Author(s): Takayuki Shimada, Satoshi Tomita, Shu Hotta, Shinji Hayashi, Hisao Yanagi
  • Journal Title: Japanese Journal of Applied Physics Vol.48
  • NAID: 210000066471
  • Peer Reviewed
• [Journal Article] Anisotropic propagation of surface plasmon polaritons caused by oriented molecular overlaye (2009)
  • Author(s): Fadiah Adlina M.Ghazali
  • Journal Title: Applied Physics Letters 94
  • Peer Reviewed
• [Presentation] Anisotropic propagation of surface plasmon polaritons induced by oriented molecular layers (2010)
  • Author(s): Youhei Takeichi, Minoru Fujii, Shinji Hayashi
  • Organizer: 11th International Conference on Near-field Optics, Nanophotonics & Related Techniques (NFO-11)
  • Place of Presentation: Beijing, China
  • Year and Date: 2010-08-29
• [Presentation] Anisotropic propagation of surface plasmon polaritons induced by oriented molecular layers (2010)
  • Author(s): Youhei Takeichi
  • Organizer: 11^<th> International Conference on Near-field Optics, Nanophotonics & Related Techniques (NFO-11)
  • Place of Presentation: Beijing, China
  • Year and Date: 2010-08-29
• [Presentation] Enhanced light emission from an organic emitting layer embedded in metal-insulator-metal structures (2010)
  • Author(s): Suk Chan Kim, Minoru Fujii, Shinji Hayashi
  • Organizer: KJF Internal Conference on Organic Materials for Electronics and Photonics (KJF 2010)
  • Place of Presentation: Fukuoka, Japan
  • Year and Date: 2010-08-23
• [Presentation] Enhanced Photoluminescence from Dye Layers Embedded in Metal-Insulator-Metal Structures (2009)
  • Author(s): Shinichi HAYASHI
  • Organizer: The 15th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter
  • Place of Presentation: Lyon, France
  • Year and Date: 2009-07-13
• [Presentation] Enhanced light emission mediated by radiative surface plasemons in metal-insulator-metal structures (2009)
  • Author(s): Shinji Hayashi, Akimichi Maekawa, Shinichi Hayashi, Minoru Fujii
  • Organizer: 4th Int.Conf.on Surface Plamon Photonics (SPP4)
  • Place of Presentation: Amsterdam, The Netherlands
  • Year and Date: 2009-06-22
• [Presentation] Enhanced light emission mediated by radiative surface plasemons in metal-insulator-metal structures (2009)
  • Author(s): Shinji HAYASHI
  • Organizer: 4th Int. Conf, on Surface Plamon Photonics(SPP4)
  • Place of Presentation: Amsterdam, The Netherlands
  • Year and Date: 2009-06-22
• [Presentation] Anisotropic propagation of surface plasmon polaritons caused by oridented molecular overlaye (2009)
  • Author(s): Fadiah Adlina M.Ghazali
  • Organizer: 4th Int. Conf. on Surface Plamon Photonics(SPP4)
  • Place of Presentation: Amsterdam, The Netherlands
  • Year and Date: 2009-06-22
• [Presentation] 金属/誘電体/金属構造の輻射的表面プラズモンと発光増強 (2009)
  • Author(s): 林真至
  • Organizer: 第56回応用物理学関係連合講演会、「表面プラズモン輻射フォトニクス」シンポジウム
  • Place of Presentation: 筑波大学
  • Year and Date: 2009-03-31
• [Presentation] 金属/誘電体/金属構造の輔射的表面プラズモンと発光増強 (2009)
  • Author(s): 林真至
  • Organizer: 第5 6回応用物理学関係連合講演会、「表面プラズモン輔射フォトニクス」シンポジウム
  • Place of Presentation: 筑波大学
  • Year and Date: 2009-03-31
• [Presentation] 金属/誘電体/金属構造に埋め込まれた有機色素の発光増強メカニズム (2009)
  • Author(s): 林 真一
  • Organizer: 第7回プラズモニクスシンポジウム
  • Place of Presentation: 徳島大学
  • Year and Date: 2009-03-07
• [Book] プラズモンナノ材料の最新技術(第1章プラズモンの基礎,1伝搬型表面プラズモンと局在型表面プラズモン-表面プラズモンのここが知りたいQ&A-)(山田淳監修) (2009)
  • Author(s): 林真至
  • Publisher: シーエムシー出版
• [Book] 金属ナノ・マイクロ粒子の形状・構造制御技術(第7章新しい製法, 4ガス中蒸発法)(米澤徹監修) (2009)
  • Author(s): 林真至
  • Publisher: シーエムシー出版
• [Book] プラズモンナノ材料の最新技術, 第1章 プラズモンの基礎, 1伝搬型表面プラズモンと局在型表面プラズモン-表面プラズモンのここが知りたい Q&A- (2009)
  • Author(s): 林真至
  • Total Pages: 113
  • Publisher: シーエムシー出版