摘要
钙钛矿太阳能电池因其优异的光电性能成为了目前研究热点,但是目前广泛采用的钙钛矿多晶离子晶体薄膜多是基于溶液处理工艺制备的,这不可避免地会在薄膜结晶过程中产生高密度缺陷,其中包括点缺陷和扩展缺陷,又可分为浅能级缺陷和深能级缺陷两类.多种类型的缺陷是导致器件内部发生严重非辐射复合的主要原因,进而限制太阳能电池器件光伏特性和稳定性的提升.本文综述了钙钛矿晶体薄膜缺陷钝化策略的最新进展,具体包括路易斯酸、路易斯碱、阴阳离子和宽带隙表面修饰策略,并详细阐述了多种策略对钙钛矿表/界面缺陷的调控机理钝化效果.同时探讨了晶体缺陷与器件稳定性的内在联系,并对未来研究中缺陷钝化策略的可行性方案进行了展望.
Research on perovskite solar cells is prevalent because of their excellent photovoltaic performance.Most of the perovskite films are prepared by poly crystalline perovskite films and low-temperature solution method,thus inevitably creating a high density of defects,including point defects and extended defects.These defects can also be divided into two types:shallow-level defects and deep-level defects.The multiple types of defects are the main cause of nonradiative recombination,which will limit the enhancement of photovoltaic properties and stability of solar cell devices.In this paper,we review the latest advances in defect passivation and describe in detail the mechanisms of different methods to passivate defects at the surface and interface of perovskite films to reduce nonradiative recombination.We also summarize the research results about the defect passivation to reduce the deep energy level traps by Lewis acid and base,anion and cation,and the results about the conversion of defects into wide band gap materials as well.The effects of various strategies to modulate the mechanism of passivation of perovskite surface/interface defects are also elaborated.In addition,we discuss the intrinsic link between crystal defects and device stability,and provide an outlook on the feasibility of defect passivation strategies in future research.
作者
王成麟
张左林
朱云飞
赵雪帆
宋宏伟
陈聪
Wang Cheng-Lin;Zhang Zuo-Lin;Zhu Yun-Fei;Zhao Xue-Fan;Song Hong-Wei;Chen Cong(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;State Key Laboratory on Integrated Optoelectronics,College of Electronic Science&Engineering,Jilin University,Changchun 130012,China)
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2022年第16期284-300,共17页
Acta Physica Sinica
关键词
缺陷钝化
钙钛矿太阳能电池
路易斯酸碱
非辐射复合
defect passivation
perovskite solar cells
Lewis acid and base
nonradiative recombination
作者简介
通信作者:宋宏伟,E-mail:songhw@jlu.edu.cn。
