| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2022: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2021: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
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| Outline of Final Research Achievements |
Organic solar cells (OSCs) are regarded as the promising candidates for next-generation solar cells. To improve the power conversion efficiency of OSCs, it is essential to reduce voltage losses. The critical problem of voltage loss is related to the large exciton binding energy (low dielectric constant) of organic semiconducting materials. To solve this problem, we focused on the development of organic semiconducting materials with high dielectric constants. In particular, we focused on the development of nonfullerene acceptors with high dielectric constants. As a result, we found that the exciton binding energy is affected by the molecular structures and electronic structures. Furthermore, we found a correlation between the exciton binding energy and the power conversion efficiency of OSCs.
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