Creation of Organic Semiconductors with Improving Carrier Mobility by Mechanical Stimuli

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K22181
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 33:Organic chemistry and related fields
• Research Institution: Nagoya University
• Principal Investigator: Matsuo Yutaka 名古屋大学, 工学研究科, 教授 (00334243)
• Project Period (FY): 2019-06-28 – 2021-03-31
• Keywords: メカノクロミズム / クロミック分子 / 平衡 / 熱力学 / 有機半導体 / 含浸 / 変色分子 / 原子間力顕微鏡

Outline of Final Research Achievements

Thermodynamic parameters were determined from the Arrhenius plot for the equilibrium of the two conformers of fluorenilidene-acridan. In perovskite solar cells using fluorenylidene-acridane as an organic semiconductor, the energy conversion efficiency was improved to 19.1% when fluorenylidene-acridane was used compared to when it was not used (17.0%). Using a nanoindenter and a Kelvin probe atomic force microscope, it became possible to know the numerical value of the pressure by observing the change in the potential difference due to pressing.

Free Research Field

材料科学

Academic Significance and Societal Importance of the Research Achievements

押したり曲げたりすることにより電気伝導度や色が変わる有機半導体を用いて，高分解能で繰り返し使用可能な圧力測定フィルム，クロミック塗料，色も変わる圧電デバイスなど，新しい製品が生まれる可能性がある．見た目の色（吸収色）が変化するメカノクロミズムは本系が唯一であり，垂直の圧力で色が変わるデバイスも唯一のものである．我が国の独創性のある研究を，新産業の創出に繋げたい．