Liu Yanghua, Gao Weiyin, Ran Chenxin, Dong He, Sun Nan, Ran Xueqin, Xia Yingdong, Song Lin, Chen Yonghua, Huang Wei
Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, 1, 127 West Youyi Road, Xi'an, 710072, P. R. China.
Key Laboratory of Flexible Electronics (KLOFE) & Institution of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing, 211816, Jiangsu, P.R. China.
ChemSusChem. 2020 Dec 17;13(24):6477-6497. doi: 10.1002/cssc.202001680. Epub 2020 Sep 25.
Recently, the power conversion efficiency (PCE) of perovskite solar cells (PSC) based on organic-inorganic hybrid Pb halide perovskites has reached 25.2 %. However, the toxicity of Pb has still been a main concern for the large-scale commercialization of Pb-based PSCs. Efforts have been made during the past few years to seek eco-friendly Pb-free perovskites, and it is a growing consensus that Sn is the best choice as Pb alternative over any other Pb-free metal elements. Among Sn-based perovskites, all-inorganic cells are promising candidates for PSCs owing to their more suitable bandgap, better stability, and higher charge mobility compared to the organic-inorganic hybrid counterparts. However, the poor phase stability of all-inorganic Sn-based perovskites (AISPs) and low PCE of their PSCs are most challenging in the field at present. Herein, recent developments on PSCs based on AISPs, including CsSnX and Cs SnX (X=Br, I), are comprehensively reviewed. Primarily, the intrinsic characteristics of the two AISPs are overviewed, including crystallographic property, band structure, charge carrier property, and defect property. Sequentially, state-of-the-art progress, regarding the photovoltaic application of AISPs as light absorber, is summarized. At last, current challenges and future opportunities of AISP-based PSCs are also discussed.
最近，基于有机-无机杂化卤化铅钙钛矿的钙钛矿太阳能电池（PSC）的功率转换效率（PCE）已达到25.2%。然而，铅的毒性仍然是基于铅的PSC大规模商业化的主要关注点。在过去几年中，人们一直在努力寻找环保的无铅钙钛矿，并且越来越多的人认为，在所有无铅金属元素中，锡是替代铅的最佳选择。在基于锡的钙钛矿中，全无机电池因其与有机-无机杂化电池相比具有更合适的带隙、更好的稳定性和更高的电荷迁移率，是PSC很有前景的候选者。然而，全无机锡基钙钛矿（AISP）较差的相稳定性及其PSC的低PCE是目前该领域最具挑战性的问题。在此，对基于AISP的PSC的最新进展进行了全面综述，包括CsSnX和CsSnX（X = Br、I）。首先，概述了这两种AISP的内在特性，包括晶体学性质、能带结构、电荷载流子性质和缺陷性质。接着，总结了AISP作为光吸收体在光伏应用方面的最新进展。最后，还讨论了基于AISP的PSC当前面临的挑战和未来机遇。
