The exploration of low bandgap perovskite material to approach Shockley-Queisser limit of photovoltaic device is of great significance,but it is still challenging.During the past few years,tin-lead (Sn-Pb) mixed perovskites with low bandgaps have been rapidly developed,and their single junction solar cells have reached power conversion efficiency (PCE) over 21％,which also makes them ideal candidate as low band-gap sub-cell for tandem device.Nevertheless,due to the incorporation of unstable Sn2+,the stability issue becomes the vital problem for the further development of Sn-Pb mixed perovskite solar cells (PSCs).In this review,we are dedicated to give a full view in current understanding on the stability issue of Sn-Pb mixed perovskites and their PSCs.We begin with the demonstration on the origin of instability of Sn-Pb mixed perovskites,including oxidation of Sn2+,defects,and interfacial layer induced instability.Sequentially,the up-to-date developments on the stability improvement of Sn-Pb mixed perovskites and their PSCs is systematically reviewed,including composition engineering,additive engineering,and interfacial engineering.At last,the current challenges and future perspectives on the stability study of Sn-Pb mixed PSCs are discussed,which we hope could promote the further application of Sn-Pb mixed perovskites towards commercialization.

Shaoshen Lv;Weiyin Gao;Yanghua Liu;He Dong;Nan Sun;Tingting Niu;Yingdong Xia;Zhongbin Wu;Lin Song;Chenxin Ran;Li Fu;Yonghua Chen

Frontiers Science Center for Flexible Electronics,Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering,Xi'an 710072,Shaanxi,China;Key Laboratory of Flexible Electronics (KLOFE) & Institution of Advanced Materials (IAM),Nanjing Tech University (NanjingTech),Nanjing 211816,Jiangsu,China;School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China

能源化学

[1]Shaoshen Lv;Weiyin Gao;Yanghua Liu;He Dong;Nan Sun;Tingting Niu;Yingdong Xia;Zhongbin Wu;Lin Song;Chenxin Ran;Li Fu;Yonghua Chen-.Stability of Sn-Pb mixed organic-inorganic halide perovskite solar cells:Progress,challenges,and perspectives)[J].能源化学,2022(02):371-404

Stability,Pb,mixed,inorganic,halide,solar,cells,Progress,challenges,perspectives,exploration,low,material,approach,Shockley,Queisser,limit,photovoltaic,device,great,significance,but,still,challenging,During,past,few,years,tin,lead,perovskites,bandgaps,have,been,rapidly,developed,their,single,junction,reached,power,conversion,efficiency,PCE,over,which,also,makes,them,ideal,candidate,sub,tandem,Nevertheless,due,incorporation,unstable,Sn2+,issue,becomes,vital,problem,further,PSCs,In,this,are,dedicated,give,full,current,understanding,We,begin,demonstration,origin,instability,including,oxidation,defects,interfacial,layer,induced,Sequentially,up,developments,improvement,systematically,reviewed,composition,engineering,additive,At,last,future,study,discussed,hope,could,promote,application,towards,commercialization

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