Initializing film homogeneity to retard phase segregation for stable perovskite solar cells
2023-06-19
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
