A holistic approach to interface stabilization for efficient perovskite solar modules with over 2,000-hour operational stability

Zonghao Liu, Longbin Qiu, Luis K. Ono, Sisi He, Zhanhao Hu, Maowei Jiang, Guoqing Tong, Zhifang Wu, Yan Jiang, Dae-Yong Son, Yangyang Dang, Said Kazaoui and Yabing Qi ()
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Zonghao Liu: Okinawa Institute of Science and Technology Graduate University (OIST)
Longbin Qiu: Okinawa Institute of Science and Technology Graduate University (OIST)
Luis K. Ono: Okinawa Institute of Science and Technology Graduate University (OIST)
Sisi He: Okinawa Institute of Science and Technology Graduate University (OIST)
Zhanhao Hu: Okinawa Institute of Science and Technology Graduate University (OIST)
Maowei Jiang: Okinawa Institute of Science and Technology Graduate University (OIST)
Guoqing Tong: Okinawa Institute of Science and Technology Graduate University (OIST)
Zhifang Wu: Okinawa Institute of Science and Technology Graduate University (OIST)
Yan Jiang: Okinawa Institute of Science and Technology Graduate University (OIST)
Dae-Yong Son: Okinawa Institute of Science and Technology Graduate University (OIST)
Yangyang Dang: Okinawa Institute of Science and Technology Graduate University (OIST)
Said Kazaoui: National Institute of Advanced Industrial Science and Technology (AIST)
Yabing Qi: Okinawa Institute of Science and Technology Graduate University (OIST)

Nature Energy, 2020, vol. 5, issue 8, 596-604

Abstract: Abstract The upscaling of perovskite solar cells to module scale and long-term stability have been recognized as the most important challenges for the commercialization of this emerging photovoltaic technology. In a perovskite solar module, each interface within the device contributes to the efficiency and stability of the module. Here, we employed a holistic interface stabilization strategy by modifying all the relevant layers and interfaces, namely the perovskite layer, charge transporting layers and device encapsulation, to improve the efficiency and stability of perovskite solar modules. The treatments were selected for their compatibility with low-temperature scalable processing and the module scribing steps. Our unencapsulated perovskite solar modules achieved a reverse-scan efficiency of 16.6% for a designated area of 22.4 cm2. The encapsulated perovskite solar modules, which show efficiencies similar to the unencapsulated one, retained approximately 86% of the initial performance after continuous operation for 2,000 h under AM1.5G light illumination, which translates into a T90 lifetime (the time over which the device efficiency reduces to 90% of its initial value) of 1,570 h and an estimated T80 lifetime (the time over which the device efficiency reduces to 80% of its initial value) of 2,680 h.

Date: 2020
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DOI: 10.1038/s41560-020-0653-2

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