Wide-gap non-fullerene acceptor enabling high-performance organic photovoltaic cells for indoor applications

Yong Cui, Yuming Wang, Jonas Bergqvist, Huifeng Yao, Ye Xu, Bowei Gao, Chenyi Yang, Shaoqing Zhang, Olle Inganäs, Feng Gao () and Jianhui Hou ()
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Yong Cui: Chinese Academy of Sciences
Yuming Wang: Linköping University
Jonas Bergqvist: Linköping University
Huifeng Yao: Chinese Academy of Sciences
Ye Xu: Chinese Academy of Sciences
Bowei Gao: Chinese Academy of Sciences
Chenyi Yang: University of Science and Technology Beijing
Shaoqing Zhang: University of Science and Technology Beijing
Olle Inganäs: Linköping University
Feng Gao: Linköping University
Jianhui Hou: Chinese Academy of Sciences

Nature Energy, 2019, vol. 4, issue 9, 768-775

Abstract: Abstract Organic photovoltaic cells are potential candidates to drive low power consumption off-grid electronics for indoor applications. However, their power conversion efficiency is still limited by relatively large losses in the open-circuit voltage and a non-optimal absorption spectrum for indoor illumination. Here, we carefully designed a non-fullerene acceptor named IO-4Cl and blend it with a polymer donor named PBDB-TF to obtain a photoactive layer whose absorption spectrum matches that of indoor light sources. The photovoltaic characterizations reveal a low energy loss below 0.60 eV. As a result, the organic photovoltaic cell (1 cm2) shows a power conversion efficiency of 26.1% with an open-circuit voltage of 1.10 V under a light-emitting diode illumination of 1,000 lux (2,700 K). We also fabricated a large-area cell (4 cm2) through the blade-coating method. Our cell shows an excellent stability, maintaining its initial photovoltaic performance under continuous illumination of the indoor light source for 1,000 hours.

Date: 2019
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DOI: 10.1038/s41560-019-0448-5

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