Elucidation of mechanism of memory effect in photoswitching and development of new device

2010 Fiscal Year Final Research Report

• Project/Area Number: 21750184
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Functional materials/Devices
• Research Institution: Hokkaido University
• Principal Investigator: IIMORI Toshifumi 北海道大学, 電子科学研究所, 助教 (60360947)
• Project Period (FY): 2009 – 2010
• Keywords: 有機導体 / 光誘起相転移 / 有機分子エレクトロニクス / 超伝導

Research Abstract

Organic conductors, which are organic crystals having high electrical conductivity, show conductivity switching to highly conductive state in the presence of laser light and pulsed electric fields. The highly conductive state can persist after the cease of photoirradiation because of memory effect, of which the mechanism is studied through the experiments in a variety of conditions. Moreover, time-resolved measurement technique of property change induced by photoexcitation is applied to organic superconductor, and characteristic behaviors in photoresponse are observed.

Research Products

• [Journal Article] Photoinduced switching of electrical conductivity and its memory effect in the organic conductor α-(BEDT-TTF)_2I_3: Dependence on voltage height and temporal width of pulsed voltages (2010)
  • Author(s): T. Iimori, T. Naito, N. Ohta
  • Journal Title: Physica B: Condensed Matter Volume: 405 Pages: S344-S346
  • Peer Reviewed
• [Journal Article] Time-resolved measurement of the photoinduced change in the electrical conductivity of the organic superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br (2010)
  • Author(s): T. Iimori, T. Naito, N. Ohta
  • Journal Title: The Journal of Physical Chemistry C Volume: 114 Pages: 9070-9075
  • Peer Reviewed
• [Presentation] 有機超伝導体BEDT-TTF塩における光誘起電気伝導度変化の時間分解測定 (2010)
  • Author(s): 飯森俊文、他
  • Organizer: 第4回分子科学討論会
  • Place of Presentation: 大阪大学、大阪
  • Year and Date: 2010-09-16
• [Presentation] Time-resolved measurement of the photoresponse in the organic superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br (2010)
  • Author(s): T. Iimori, et al.
  • Organizer: Annual Meeting on Photochemistry 2010
  • Place of Presentation: Chiba University, Chiba, Japan
  • Year and Date: 2010-09-09
• [Presentation] Control of electrical conductivity in an organic conductor and an organic superconductor using photoirradiation and external fields (2009)
  • Author(s): T. Iimori, et al.
  • Organizer: The 6th Korea-Japan Symposium on Frontier Photoscience
  • Place of Presentation: Korea
  • Year and Date: 2009-10-31
• [Presentation] A novel optoelectronic function in an organic conductor: memory effect of photoswitching behavior controlled by pulsed electric fields and Photoirradiation (2009)
  • Author(s): T. Iimori, et al.
  • Organizer: 8th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets
  • Place of Presentation: Hilton Niseko Village, Hokkaido, Japan
  • Year and Date: 2009-09-13
• [Book] Molecular Electronic and Related Materials -Control and Probe with Light (2010)
  • Author(s): T. Iimori, T. Naito, N. Ohta
  • Total Pages: 167-184
  • Publisher: Transworld Research Network