Progress on defect and defect passivation in perovskite solar cells

Wang Cheng-Lin, 宋宏伟, 陈聪, Zhang Zuo-Lin, Song Hong-Wei, Chen Cong, 1) (School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China);, 2) (State Key Laboratory on Integrated Optoelectronics, Jilin University, Beijing 100084, China)
2022 Wuli xuebao  
Research on perovskite solar cells is prevalent because of their excellent photovoltaic performance. Most of the perovskite films are prepared by polycrystalline perovskite films and low-temperature solution method, which will lead to a high density of defects, including point defects and extended defects, and also can be divided into two categories:shallow-level defects and deep-level defects. The multiple types of defects are the main cause of nonradiative recombination, which in turn limits
more » ... he enhancement of photovoltaic properties and stability of solar cell devices. In this review, we have compiled the latest advances on defect passivation and described in detail the mechanism of different methods to passivate defects at the surface and interface of perovskite films to reduce nonradiative recombination. We have compiled research results on defect passivation to reduce deep energy level traps by Lewis acid and base, anion and cation and conversion of defects into wide band gap materials. The effect of various strategies to modulate the mechanism of passivation of perovskite surface/interface defects is also elaborated. We also discussed the intrinsic link between crystal defects and device stability, and provided an outlook on the feasibility of defect passivation strategies in future research.
doi:10.7498/aps.71.20220359 fatcat:tnv6dkritjbwnmiaoxrpghv47u