Chain Dynamics and Photo-carrier Properties for Semiconducting Polymers at Interfaces

2019 Fiscal Year Final Research Report

• Project/Area Number: 17H03118
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Polymer/Textile materials
• Research Institution: Kyushu University
• Principal Investigator: Kawaguchi Daisuke 九州大学, 工学研究院, 准教授 (70362267)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: 界面 / 分子鎖熱運動性 / 電荷生成 / 電荷移動

Outline of Final Research Achievements

Photo-carrier formation and mobility of semiconducting polymers at interfaces were examined by interface-sensitive spectroscopy. Photo-carrier formations of poly(3-hexylthiophene) at the surface and a solid interface were facilitated and suppressed, respectively, compared to the corresponding bulk. The carrier mobility in a poly(3-hexylthiophene) film was suppressed by thinning. These results can be explained in terms of the chain dynamics and the aggregation states of poly(3-hexylthiophene) at the surface and a solid interface.

Free Research Field

高分子物性

Academic Significance and Societal Importance of the Research Achievements

本研究成果の学術的意義は、高分子物性の視点から高分子半導体の界面における分子鎖熱運動性とデバイスの性能因子となる光電荷生成および移動ダイナミクスを関連付けた点にある。これにより、高分子半導体の合成―構造・物性―機能の研究サイクルが加速され、新しい高分子半導体材料の開発に繋がることが期待される。また、得られた研究成果は、高分子系エネルギーデバイスの材料設計指針に繋がるものである。