Full‐Dimensional Grain Boundary Stress Release for Flexible Perovskite Indoor Photovoltaics

Autor: Chun‐Hao Chen, Zhen‐Huang Su, Yan‐Hui Lou, Yan‐Jun Yu, Kai‐Li Wang, Gen‐Lin Liu, Yi‐Ran Shi, Jing Chen, Jun‐Jie Cao, Liang Zhang, Xing‐Yu Gao, Zhao‐Kui Wang
Rok vydání: 2022
Předmět:
Zdroj: Advanced Materials. 34:2200320
ISSN: 1521-4095
0935-9648
DOI: 10.1002/adma.202200320
Popis: Perovskite photovoltaics are strong potential candidates to drive low-power off-grid electronics for indoor applications. Compared with rigid devices, flexible perovskite devices can provide a more suitable surface for indoor small electronic devices, enabling them have a broader indoor application prospect. However, the mechanical stability of flexible perovskite photovoltaics is an urgent issue solved. Herein, a kind of 3D crosslinking agent named borax is selected to carry out grain boundary penetration treatment on perovskite film to realize full-dimensional stress release. This strategy improves the mechanical and phase stabilities of perovskite films subjected to external forces or large temperature changes. The fabricated perovskite photovoltaics deliver a champion power conversion efficiency (PCE) of 21.63% under AM 1.5G illumination, which is the highest one to date. The merit of low trap states under weak light makes the devices present a superior indoor PCE of 31.85% under 1062 lux (LED, 2956 K), which is currently the best flexible perovskite indoor photovoltaic device. This work provides a full-dimensional grain boundary stress release strategy for highly stable flexible perovskite indoor photovoltaics.
Databáze: OpenAIRE
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