Semitransparent Organic Photovoltaic Cells Based on Long-wavelength Infrared Semiconductor Layer
Kohei Kuwano a b, Yasuyuki Watanabe c, Masayuki Chikamatsu b, Yuji Yoshida b, Eiichi Nishikawa a
a Tokyo University of Science, Japan, Tokyo, Japan
b National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
c Suwa University of Science, Japan
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP20)
Tsukuba-shi, Japan, 2020 January 20th - 22nd
Organizers: Michio Kondo and Takurou Murakami
Poster, Kohei Kuwano, 103
Publication date: 14th October 2019

Semitransparent organic photovoltaic (ST-OPV) cells are one of the photovoltaic cells which gives light transmittance using transparent conductive film as top electrode. ST-OPV cells have been attracted to window, automobile and greenhouse for energy harvesting applications . In recent years, non-fullerene acceptor (NFA) material used organic photovoltaic cells have been attracted the attention and the power conversion efficiency (PCE) have been reached over 10% [1,2]. In this study, we fabricated ST-OPV cells using IEICO-4F [3] as NFA material, which absorbs longer wavelength than that of visible light. Furthermore, we investigated the effectiveness of the NFA material on the power generation characteristics.

The inverted device structure in this study was applied as follows; Glass/ITO/ZnO-nanoparticles/PTB7-Th:IEICO-4F/MoO3/IZO. We used bulk-hetero junction of PTB7-Th:IEICO-4F as active layer. The results obtained from the ST-OPV cells shows a current density of 16.18 mA/cm2, an open circuit voltage of 0.68 V, a fill factor of 0.40 and a PCE of 4.39%. Further the transmittance of ST-OPV cells was obtained about 41.23% at a wavelength of 550 nm.

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