Development of new organic spin devices exploiting currents from electron spin resonace and creation of their basic techniques

• Project/Area Number: 25288117
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Device related chemistry
• Research Institution: Osaka City University
• Principal Investigator: Kanemoto Katsuichi 大阪市立大学, 大学院理学研究科, 准教授 (40336756)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000); Fiscal Year 2015: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2014: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2013: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
• Keywords: 電子スピン共鳴 / ESR / 変位電流 / 電流検出ESR / トラップ / 有機半導体 / 誘起電流

Outline of Final Research Achievements

We recently found that a strong ESR-induced current is obtained by air-treating organic semiconductors. This research was dedicated to reveal the origin of the ESR-current effect and consider the method of applying the effect into new spin-based devices. It was revealed that this effect results from carriers in trapped sites inside organic diodes. This system was demonstrated to exhibit magneto-capacitance effects under photoexcitation, being the first result that was obtained from air-treated semiconductors. We further revealed that capacitance of this system varies by ESR. Although the proportion of change was just 0.14%, it is much larger than the previous value from other systems and the highest.

Research Products

• [Journal Article] Displacement Current Induced by Electron Spin Resonance in Organic Semiconductor (2015)
  • Author(s): Katsuichi Kanemoto, Takayuki Nakajima
  • Journal Title: Molecular Crystals and Liquid Crystals Volume: 622 Issue: 1 Pages: 129-133
  • DOI: 10.1080/15421406.2015.1105048
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Direct monitoring of bias-dependent variations in the exciton formation ratio of working organic light emitting diodes (2015)
  • Author(s): Takahiro Takahashi, Katsuichi Kanemoto, Mariko Kanenobu, Yuta Okawauchi, Hideki Hashimoto
  • Journal Title: Scientific Reports Volume: 5 Issue: 1
  • DOI: 10.1038/srep15533
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Capacitance-Variation Induced by Electron Spin Resonance in Organic Semiconductors (2015)
  • Author(s): K. Kanemoto and T. Nakajima
  • Organizer: The 9th Japanese-Russian International Workshop on Open Shell Compounds and Molecular Spin Devices
  • Place of Presentation: 淡路夢舞台国際会議場（兵庫県淡路市）
  • Year and Date: 2015-11-08
  • Int'l Joint Research / Invited
• [Presentation] 電子スピン共鳴によって誘起されるポリマーダイオードの電気容量変化 (2015)
  • Author(s): 中嶋敬幸, 鐘本勝一
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学（大阪府吹田市）
  • Year and Date: 2015-09-16
• [Presentation] Capacitance Variation Induced by Electron Spin Resonance in Organic Semiconductors. (2015)
  • Author(s): K. Kanemoto and T. Nakajima
  • Organizer: 3rd Awaji International Workshop on “Electron Spin Science & Technology
  • Place of Presentation: 淡路夢舞台国際会議場（兵庫県淡路市）
  • Year and Date: 2015-06-14
  • Int'l Joint Research / Invited
• [Presentation] ポリマーダイオードにおける電気容量の磁場効果 (2015)
  • Author(s): 中嶋 敬幸, 鐘本 勝一
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学湘南キャンパス（神奈川県平塚市）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] Spin Pairs in Polymer Light Emitting Diodes Studied by Electrically and Electroluminescence Detected Magnetic Resonance Techniques (2014)
  • Author(s): K. Kanemoto and K. Kimura
  • Organizer: 5th International Meeting on Spin in Organic Semiconductors
  • Place of Presentation: イーグレ姫路（兵庫県姫路市）
  • Year and Date: 2014-10-13 – 2014-10-17
• [Presentation] Displacement Current Induced by Electron Spin Resonance in Organic Semiconductor (2014)
  • Author(s): Katsuichi Kanemoto, Takayuki Nakajima
  • Organizer: KJF-International Conference on Organic Materials for Electronics and Photonics
  • Place of Presentation: つくば国際会議場（茨城県つくば市）
  • Year and Date: 2014-09-21 – 2014-09-24
• [Presentation] Dissociation of Spin Pairs in Polymer Light Emitting Diodes Revealed by Voltage-Dependent ODMR Signals (2014)
  • Author(s): K. Kanemoto
  • Organizer: 2nd Awaji International Workshop on “Electron Spin Science & Technology
  • Place of Presentation: 淡路夢舞台国際会議場（兵庫県淡路市）
  • Year and Date: 2014-06-15 – 2014-06-17
  • Invited
• [Presentation] A Displacement Current Induced by ESR for Organic Semiconductor Diodes (2013)
  • Author(s): K. Kanemoto
  • Organizer: 1st Awaji International Workshop on Electron Spin Science & Technology (AWEST)
  • Place of Presentation: Awaji Yumebutai International Conference Center, 淡路島
  • Invited
• [Presentation] 電流検出ESRの印加電圧依存性からみたポリマーEL動作におけるスピンペアの役割 (2013)
  • Author(s): 木村圭吾、鐘本勝一
  • Organizer: 電子スピンサイエンス学会年会2013
  • Place of Presentation: さいたま市大宮ソニック市民ホール
• [Presentation] Spin Pair States in Polymer Light Emitting Diodes (2013)
  • Author(s): K. Kanemoto and K. Kimura
  • Organizer: The 7th Japanese-Russian International Workshop on Open Shell Compounds and Molecular Spin Devices, Awaji International Conference Center
  • Place of Presentation: Awaji Yumebutai International Conference Center, 淡路島
  • Invited