Understanding the Decoupled Effects of Cations and Anions Doping for High-Performance Perovskite Solar Cells  

作　　者：Tianxiang Hu Yixi Wang Kai Liu Jia Liu Haoyang Zhang Qudrat Ullah Khan Shijie Dai Weifan Qian Ruochen Liu Yanyan Wang Chongyuan Li Zhenru Zhang Mingxiang Luo Xiaofei Yue Chunxiao Cong Yuan Yongbo Anran Yu Jia Zhang Yiqiang Zhan 

机构地区：[1]Center of Micro-Nano System,School of Information Science and Technology,Fudan University,Shanghai 200438,People’s Republic of China [2]The State Key Laboratory of Photovoltaic Science and Technology,Institute of Optoelectronics,Fudan University,Shanghai 200438,People’s Republic of China [3]Institute for Electric Light Sources,School of Information Science and Technology,Fudan University,Shanghai 200438,People’s Republic of China [4]Hunan Key Laboratory of Nanophotonics and Devices,School of Physics,Central South University,Changsha 410083,People’s Republic of China [5]Vanced Materials Technology(Zhongshan)Co.,Ltd.,Guangdong 528437,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第6期411-426,共16页纳微快报(英文版)

基　　金：support from the National Key Research and Development Program of China(No.2022YFE0137400);the National Natural Science Foundation of China(Grant No.62274040).

摘　　要：The past decade has witnessed the rapid increasement in power conversion efficiency of perovskite solar cells(PSCs).However,serious ion migration hampers their operational stability.Although dopants composed of varied cations and anions are introduced into perovskite to suppress ion migration,the impact of cations or anions is not individually explored,which hinders the evaluation of different cations and further application of doping strategy.Here we report that a special group of sulfonic anions(like CF_(3)SO_(3)^(-))successfully introduce alkaline earth ions(like Ca^(2+))into perovskite lattice compared to its halide counterparts.Furthermore,with effective crystallization regulation and defect passivation of sulfonic anions,perovskite with Ca(CF_(3)SO_(3))_(2)shows reduced PbI2 residue and metallic Pb0 defects;thereby,corresponding PSCs show an enhanced PCE of 24.95%.Finally by comparing the properties of perovskite with Ca(CF_(3)SO_(3))_(2)and FACF_(3)SO_(3),we found that doped Ca^(2+)significantly suppressed halide migration with an activation energy of 1.246 eV which accounts for the improved operational stability of Ca(CF_(3)SO_(3))_(2-)doped PSCs,while no obvious impact of Ca^(2+)on trap density is observed.Combining the benefits of cations and anions,this study presents an effective method to decouple the effects of cations and anions and fabricate efficient and stable PSCs.

关 键 词：Perovskite solar cells Interstitial doping Effect decoupling Ion migration 

分 类 号：O61[理学—无机化学]