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High-performance pulse light stable perovskite indoor photovoltaics

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Perovskite solar cells offer great potential as a sustainable power source for distributed electronic devices that operate indoors.However,the impact of advanced lighting technology,especially the widely used pulse width modulation(PWM)technology,on perovskite photovoltaics has been ignored.Herein,for the first time in photovoltaics,we find that the light impact emitted by the PWM lighting system caused dynamic strain in perovskite thin films,induced phase separation,and accelerated the generation of metallic lead(Pb0)defects,leading to irreversible degradation of the cell performance after 27 h(T80).To address this issue,formamidinium triiodide(FAI3)is chosen to treat the surface of the perovskite and release residual stress,resulting in reduced lattice deformation during dynamic strain processes.Meanwhile,it suppresses harmful Pb0 defects and reduces Voc loss at low light intensity.The champion device achieves impressive power conversion efficiency(PCE)of 35.14％and retains 99.5％of the initial PCE after continuous strobe light soaking for 2160 h.

Perovskite solar cellsIndoor photovoltaicsInterface engineeringMicro-strain releasing

Chen Li、Haoxuan Sun、Min Wang、Shan Gan、Da Dou、Liang Li

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School of Physical Science and Technology,Jiangsu Key Laboratory of Thin Films,Center for Energy Conversion Materials & Physics(CECMP),Soochow University,Suzhou 215006,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu ProvincePriority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions

523320085202502852202273BK20210728

2024

10.1016/j.scib.2023.12.022

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(3)
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