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

• DOI: 10.1002/adma.202200320
• Publication Date: 2022-02-24T13:44:55Z
• Authors: 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
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

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 small electronic enabling them have broader application prospect. However, the mechanical stability of is an urgent issue solved. Herein, kind 3D crosslinking agent named borax selected carry out grain boundary penetration treatment on film realize full-dimensional stress release. This strategy improves and phase stabilities films subjected external forces or large temperature changes. The fabricated deliver champion power conversion efficiency (PCE) 21.63% under AM 1.5G illumination, which highest one date. merit low trap states weak light makes present superior PCE 31.85% 1062 lux (LED, 2956 K), currently best photovoltaic device. work provides release highly stable photovoltaics.