Highly efficiency Organic Light Emitting Devices by the surpressed Surface Plasmon Loss and its application for Flexible Light Sources

• Project/Area Number: 25410252
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Device related chemistry
• Research Institution: Kanazawa Institute of Technology
• Principal Investigator: Mikami Akiyoshi 金沢工業大学, 工学部, 教授 (70319036)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 有機EL / 照明装置 / 電機・電子材料 / シュミレーション工学 / 有機ＥＬ / 表面プラズモン / フレキシブル / シミュレーション

Outline of Final Research Achievements

The objective of this research activity is the reduction of a surface plasmon loss and the improvement of optical extraction efficiency which occupy approximately a half of optical losses in the organic light emitting devices. For this reason, I developed the optical method which connects seamlessly the surface plasmon resonance in the metal electrode with the optical propagation in an organic thin film by employing original multi-scale analysis. Moreover, the refractive index controlled substrate was used in the organic EL device together with the multi-cathode structure. Research results showed that external quantum efficiency was improvable two or three times compared with conventional EL structure. These results suggest the importance and possibility of optical design technique towards an improvement in luminous efficiency. It will be possible of the white organic EL device exceeding 50% of external quantum efficiency.

Research Products

• [Journal Article] 有機ELの光学デザイン - マルチカソード構造を利用した光学損失の低減 (2014)
  • Author(s): 三上明義
  • Journal Title: 機能材料誌 Volume: 34 Pages: 3-15
  • Peer Reviewed
• [Journal Article] High-Efficiency Green Phosphorescent Organic Light-Emitting Diodes with Double-Emission Layer and Thick N-doped Electron Transport Layer (2014)
  • Author(s): Shunichiro Nobuki, Hironori Wakana, SHigeo Ishihara, Akiyoshi Mikami
  • Journal Title: Thin Solid Film Volume: 554 Pages: 27-31
  • Peer Reviewed
• [Journal Article] 有機E L ディスプレイの基礎 (2013)
  • Author(s): 三上明義
  • Journal Title: 映像情報メディア学会誌 Volume: 67 Pages: 800-805
  • NAID: 110009660719
  • Peer Reviewed
• [Journal Article] Optical design of enhanced light extraction efficiency in organic light emitting device with an optically controlled surface plasmon coupling (2013)
  • Author(s): Akiyoshi Mikami
  • Journal Title: Journal of Light & Visual Environment Volume: 37 Pages: 62-65
  • NAID: 130004439763
  • Peer Reviewed
• [Presentation] Enhancement of Extraction Efficiency in OLED with Multi-Cathode Structure Prepared on a Plastic Substrate (2015)
  • Author(s): Akiyoshi Mikami, Shuhei Doi
  • Organizer: the 32th International Reserch Conference (EuroDisplay15)
  • Place of Presentation: Gent (Bergy)
  • Year and Date: 2015-09-21
  • Int'l Joint Research
• [Presentation] 二種類の光散乱・透過法を用いた有機ＥＬ光取り出し層の解析 (2015)
  • Author(s): 土居周平、三上明義
  • Organizer: 有機ＥＬ討論会 第20回例会
  • Place of Presentation: 千葉大学（千葉市）
  • Year and Date: 2015-06-19
• [Presentation] The Control of Optical Properties by Back Cavity Effect in OLEDs with Multi-cathode Structure (2015)
  • Author(s): Akiyoshi Mikami, Shuhei Doi
  • Organizer: Society for Information Display, 2015, International Symposium
  • Place of Presentation: San Jose. (USA)
  • Year and Date: 2015-06-04
  • Int'l Joint Research
• [Presentation] 計算科学を用いた有機EL素子の光学デザイン (2014)
  • Author(s): 三上明義
  • Organizer: 有機ＥＬ討論会第19回例会
  • Place of Presentation: 沖縄県市町村自治会館 (沖縄県那覇市)
  • Year and Date: 2014-11-27 – 2014-11-28
  • Invited
• [Presentation] ＬＥＤ法およびＰＬ法を用いた有機ＥＬ光取り出しフィルムの評価・解析 (2014)
  • Author(s): 土居周平、三上明義
  • Organizer: 第75 回応用物理学会秋季学術講演会
  • Place of Presentation: 北海道大学 (北海道札幌市)
  • Year and Date: 2014-09-17 – 2014-09-21
• [Presentation] Optical Control of Surface Plasmon Coupling in Organic Light Emitting Devices with Nanosized Multi-cathode Structure (2014)
  • Author(s): Akiyoshi Mikami, Inoue Hitoshi
  • Organizer: The 5th International Conference on Nanotechnology: Fundamentals and Applications
  • Place of Presentation: Prague (Czech Republic)
  • Year and Date: 2014-08-11 – 2014-08-13
• [Presentation] 高効率有機ELの実現に向けた光学設計技術 (2014)
  • Author(s): 三上明義
  • Organizer: 電子情報通信学会総合大会
  • Place of Presentation: 新潟
  • Invited
• [Presentation] Optical Control of Surface Plasmon Loss in Transparent Organic Light Emitting Devices Coupled with Optical Compensation Layer (2013)
  • Author(s): Akiyoshi Mikami
  • Organizer: Society for Information Display
  • Place of Presentation: Vancouver, Canada
• [Presentation] Enhancement of Light Extraction Efficiency in Organic Light Emitting Devices with Multi Cathode Structure on High Refractive-Index Plastic Substrate (2013)
  • Author(s): Akiyoshi Mikami
  • Organizer: International Conference on Flexible Organic Electronics
  • Place of Presentation: Thessaloniki, Greece
• [Presentation] マルチカソード構造を用いた有機ＥＬの光取り出し技術 (2013)
  • Author(s): 三上明義
  • Organizer: 高分子学会、有機エレクトロニクス研究会
  • Place of Presentation: 横浜
  • Invited
• [Presentation] 長距離伝搬型表面プラズモンを利用したマルチカソード構造有機ＥＬにおける光学損失の低減 (2013)
  • Author(s): 三上明義、大橋卓巳、井上史仁
  • Organizer: 有機ＥＬ討論会
  • Place of Presentation: 新潟
• [Presentation] Enhancement of Light Extraction Efficiency in Organic Light Emitting Devices with Multi-Cathode Structure (2013)
  • Author(s): Akiyoshi Mikami
  • Organizer: International Workshop on Flexible & Printable Electronics
  • Place of Presentation: Jeonju, Korea
  • Invited
• [Book] ウェットプロセスによる精密薄膜コーティング技術 (2014)
  • Author(s): 三上明義、真部 高明、近藤 尚城、西尾 勤、金子 四郎、金森 義明、井本 克之、福田 武司、土屋 哲男、内山 元広、坪 泰文、佐藤 正秀、井上 均、西田 広泰、福山 紅陽、板谷 義紀、鏡 裕行、下河 有司、矢澤 哲夫、福井 俊巳、他
  • Total Pages: 561
  • Publisher: ㈱情報技術協会出版
• [Patent(Industrial Property Rights)] 発光素子 (2014)
  • Inventor(s): 次世代化学材料評価技術研究組合、金沢工業大学
  • Industrial Property Rights Holder: 次世代化学材料評価技術研究組合、金沢工業大学
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2014-195969
  • Filing Date: 2014-09-26