Author(s): Bai, Y (Bai, Yang); Huang, ZJ (Huang, Zijian); Zhang, X (Zhang, Xiao); Lu, JZ (Lu, Jiuzhou); Niu, XX (Niu, Xiuxiu); He, ZW (He, Ziwen); Zhu, C (Zhu, Cheng); Xiao, MQ (Xiao, Mengqi); Song, QZ (Song, Qizhen); Wei, XY (Wei, Xueyuan); Wang, CY (Wang, Chenyue); Cui, ZH (Cui, Zhenhua); Dou, J (Dou, Jing); Chen, YH (Chen, Yihua); Pei, FT (Pei, Fengtao); Zai, HC (Zai, Huachao); Wang, W (Wang, Wei); Song, TL (Song, Tinglu); An, PF (An, Pengfei); Zhang, J (Zhang, Jing); Dong, JC (Dong, Juncai); Li, YM (Li, Yiming); Shi, JJ (Shi, Jiangjian); Jin, HB (Jin, Haibo); Chen, PW (Chen, Pengwan); Sun, YC (Sun, Yuchao); Li, YJ (Li, Yujing); Chen, HN (Chen, Haining); Wei, ZM (Wei, Zhongming); Zhou, HP (Zhou, Huanping); Chen, Q (Chen, Qi)
 
Source: SCIENCE Volume: 378  Issue: 6621  DOI: 10.1126/science.abn3148  Published: NOV 18 2022 
 
Abstract: The mixtures of cations and anions used in hybrid halide perovskites for high-performance solar cells often undergo element and phase segregation, which limits device lifetime. We adapted Schelling's model of segregation to study individual cation migration and found that the initial film inhomogeneity accelerates materials degradation. We fabricated perovskite films (FA(1-x)Cs(x)PbI(3); where FA is formamidinium) through the addition of selenophene, which led to homogeneous cation distribution that retarded cation aggregation during materials processing and device operation. The resultant devices achieved enhanced efficiency and retained >91% of their initial efficiency after 3190 hours at the maximum power point under 1 sun illumination. We also observe prolonged operational lifetime in devices with initially homogeneous FACsPb(Br0.13I0.87)(3) absorbers.
 
Accession Number: WOS:000994748600001
 
PubMed ID: 36395230
 
Author Identifiers:
 
Author Web of Science ResearcherID ORCID Number
 
He, Ziwen          0000-0002-1019-3884
 
Song, Tinglu          0000-0003-3907-7956
 
Niu, Xiuxiu          0000-0002-6819-090X
 
ISSN: 0036-8075
 
eISSN: 1095-9203