Modulation of optoelectronic properties of conjugated polymers containing hyper valent heavy elements

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H02001
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 35020:Polymer materials-related
• Research Institution: Kyoto University
• Principal Investigator: Tanaka Kazuo 京都大学, 地球環境学堂, 教授 (90435660)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 近赤外

Outline of Final Research Achievements

In this research, we will develop transparent near-infrared absorbing and emitting polymers that allow light in the visible region to pass through and enable solar power generation using only near-infrared light. Light with wavelengths over 700 nm accounts for 55% of sunlight. Since the solar panels are black in color, they cannot be installed on the windows of buildings. If there is a material that can transmit visible light, efficiently absorb near-infrared light, and efficiently transmit excitons, it would be possible to generate electricity using the near-infrared light contained in sunlight even through windows. becomes possible. To achieve this goal, we developed a light-emitting material using a conjugated polymer as a scaffold that transmits visible light and absorbs only near-infrared light. The objective was achieved through substituent effects in polymers with azobenzene complexes.

Free Research Field

高分子化学

Academic Significance and Societal Importance of the Research Achievements

本研究では例として透明で近赤外発光を示す材料を得ることができた。また、近赤外吸収による光発電効率の向上の他に、さらなる用途についても応用展開が期待できる。例えば、植物の生育抑制については750 nm程度の光が有用であることが分かっている。本研究で得られた材料は可視光を透過し、近赤外領域の光を吸収することができるので、光合成の効率は維持しつつ太陽光の中の近赤外光成分を除去することで、植物の生育を劇的に向上するフィルム材料の創出が期待できる。それぞれの用途において特に発光波長の調節と効率向上について引き続き材料開発を進めていくことで成果の普及を目指す。