Charge Separation and Recombination at Conjugated-Polymer-Based Heterojunction Studied by Transient Absorption Spectroscopy

• Project/Area Number: 22750109
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Polymer chemistry
• Research Institution: Kyoto University
• Principal Investigator: BENTEN Hiroaki 京都大学, 大学院・工学研究科, 助教 (60422995)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 有機へテロ界面 / 励起子拡散 / 共役高分子 / 電荷生成 / 電荷再結合 / ヘテロ界面 / フラーレン / 電荷分離 / 機能性高分子 / 有機太陽電池

Research Abstract

Conjugated polymer/fullerene heterostructures are designed by spin-coating a conjugated polymer on top of the insoluble film of the fullerene derivative with thermally cross-linkable side chains. With this well-defined D/A heterostructure system, an exciton diffusion length in the conjugated polymer can be estimated from the fluorescence quenching data. The direct observation of charge generation and recombination dynamics at the D/A interface is also performed by transient absorption spectroscopy.

Research Products

• [Journal Article] Polymer/Polymer Blend Solar Cellswith 2. 0% Efficiency Developed by Thermal Purification and Nanoscale-Phase-Separated Morphology (2011)
  • Author(s): D. Mori, H. Benten, J. Kosaka, H. Ohkita, S. Ito, K. Miyake
  • Journal Title: ACS Appl.Mater.Interfaces Volume: 3 Issue: 8 Pages: 2924-2927
  • DOI: 10.1021/am200624s
  • Peer Reviewed
• [Presentation] ポリチオフェン/フラーレン積層二層膜における界面電荷分離 (2012)
  • Author(s): 小原峻士、辨天宏明、大北英生、伊藤紳三郎
  • Organizer: 第56回高分子研究発表会(神戸
  • Place of Presentation: 兵庫県民会館
  • Year and Date: 2012-07-16
• [Presentation] 積層型構造を有する共役高分子薄膜における界面電荷分離 (2011)
  • Author(s): 小原峻士、辨天宏明、大北英生、伊藤紳三郎
  • Organizer: 第30回固体・表面光化学討論会
  • Place of Presentation: 信州科学技術総合振興センター
  • Year and Date: 2011-11-22
• [Presentation] ポリチオフェン/フラーレン積層二層膜における界面電荷分離 (2010)
  • Author(s): 小原峻士・辨天宏明・大北英生・伊藤紳三郎
  • Organizer: 第56回高分子研究発表会
  • Place of Presentation: 兵庫県民会館
  • Year and Date: 2010-07-16
• [Remarks]
  • URL: http://www.photo.polym.kyoto-u.ac.jp/
• [Remarks]
  • URL: http://www.photo.polym.kyoto-u.ac.jp/