MASCN Surface Treatment to Reduce Phase Transition Temperature and Regulate Strain for Efficient and Stable α-FAPbI3 Perovskite Solar Cells

被引：8
|
作者：
Luo, Tianyuan [1 ,2 ]
Chen, Rui [3 ]
Zhang, Gaojie [1 ]
Li, Luji [1 ]
Wu, Hao [1 ]
Zhang, Wenfeng [1 ]
Chen, Wei [3 ]
Chang, Haixin [1 ,2 ,4 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mold Technol, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Shenzhen R&D Ctr, Shenzhen 518000, Peoples R China
[3] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
[4] Huazhong Univ Sci & Technol, Inst Quantum Sci & Engn, Wuhan 430074, Peoples R China
来源：
ACS APPLIED MATERIALS & INTERFACES | 2023年 / 15卷 / 32期
基金：
中国国家自然科学基金;
关键词：
MASCN surface treatment; FAPbI(3) perovskitesolar cells; low temperature processing; phase transition; stability; HALIDE PEROVSKITES; FORMAMIDINIUM; PERFORMANCE;
D O I：
10.1021/acsami.3c07902
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The fabrication of & alpha;-FAPbI(3) perovskitefilms usuallyrequires high temperature annealing above 150 & DEG;C, and the residualtensile strain in the films seriously affects the stability of & alpha;-FAPbI(3) by converting to & delta;-phase FAPbI(3). Here, weuse MASCN surface treatment of FAPbI(3) films to induce arotation of the coplanar octahedron [PbI6](4-) to the metric octahedron for the strong interaction of SCN- with Pb2+, converting & delta;-FAPbI(3) into & alpha;-FAPbI(3) highly crystalline films at room temperature.The optimized FAPbI(3) films have high stability due to releasingresidual tensile strains after MASCN treatment. The efficiency ofthe MASCN-treated unannealed FAPbI(3) PSC is 19.03%, whilethe optimized FAPbI(3) annealed at 100 & DEG;C shows a maximumPCE of 21.95% on a small area. The solar cell stability for humidity,light, and thermal stability are significantly improved. The MASCNtreated FAPbI(3) achieves a PCE of 15.32% on a PSC modulewith an effective area of 9.6 cm(2) and maintains an initialefficiency of 94.1% after 100 days of ageing at 85 & DEG;C and 85%humidity.
引用
收藏
页码：38496 / 38506
页数：11
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