[20p-E307-1~9] Another way of research on organic photovoltaic cells: Indoor use and its standardization, semi-transparent

[20p-E307-4] Effect of fullerene substituent for low-light characteristics of polymer:fullerene bulk heterojunction solar cells

〇Kazuya Tada¹ (1.Univ. of Hyogo)

Keywords:Organic thin-film photovoltaic cell, Indoor application, Unmodified fullerene

Low-light characteristics of solar cells with PTB7-Th:C₇₀ and PTB7-Th:C₇₀-PCBM composites have been studied. The PTB7-Th:C₇₀ solar cell showed PCE=5.3% under 1 sun illumination and PCE=7.4% under 10^-3 sun illumination. On the other hand, although the PCE of the PTB7-Th:C₇₀-PCBM solar cell under 1 sun was 3.9%, which is significantly lower than that of the solar cell with C₇₀, it showed PCE=7.6% under 10^-3 sun illumination, which is higher than that of the solar cell with C₇₀. This result probably comes from the facts that the solar cell with C₇₀-PCBM has higher Voc at 1 sun and smaller dependence of Voc on illumination light intensity than that with C₇₀.