Improving the performance of transparent solar cells that generate electricity using unused infrared light

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K05647
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 35030:Organic functional materials-related
• Research Institution: Gifu University
• Principal Investigator: Funabiki Kazumasa 岐阜大学, 工学部, 教授 (50273123)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 色素増感型太陽電池 / 近赤外光吸収有機色素 / 赤外光

Outline of Final Research Achievements

The objective of this study was to improve the performance of transparent dye-sensitized solar cells with visible light transmission that convert unused NIR. The NIR-absorbing dyes used in these solar cells have a narrow absorption bandwidth and low conversion efficiency. To solve this problem, we designed and synthesized novel donor-acceptor (D-A) type NIR absorbing organic dyes. It was found that the maximum absorption wavelength in the NIR region can be changed by converting the donor moiety. We also designed and synthesized D-A type NIR-absorbing organic dyes with two carboxy groups as anchor groups, and found that the double-anchored D-A type NIR-absorbing organic dyes show higher stability than mono-anchored dyes, and consequently, higher conversion efficiency.

Free Research Field

有機機能化学

Academic Significance and Societal Importance of the Research Achievements

これまでに例のない無色透明色素増感型太陽電池ができる。この無色透明という機能は、景色などの可視光を透過させる太陽電池の実現であり、従来太陽電池の利用が難しかった用途や意匠的に今まで予想できなかった用途が開拓できる。