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7112883 
Journal Article 
Inorganic and Pb-Free CsBi3I10 Thin Film for Photovoltaic Applications 
Liang, GX; Su, ZHua; Chen, XYe; Chen, ZiH; Lan, HuaBin; Zheng, ZHao; Fan, P; Tian, XQ; Duan, JYi; Wei, YaD; , 
2019 
Yes 
Journal of Physical Chemistry C
ISSN: 1932-7447
EISSN: 1932-7455 
AMER CHEMICAL SOC 
WASHINGTON 
27423-27428 
WOS:000497260100016 
Computational, thin-film deposition, and characterization approaches have been used to investigate the all-inorganic lead-free CsBi3I10 as a candidate to act as a thin-film photovoltaic absorber. In this paper, CsBi3I10 was firstly predicted with a layer crystal structure of stable hexagonal phase-like Cs3Bi2I9 and then prepared by one-step coating also showing the high purity hexagonal phase and crystallinity, very consistent with the theoretical calculation. After solvent annealing, a high absorption coefficient of approximately 10(5) cm(-1) in visible light and a suitable optical band gap of 1.78 eV were obtained for the CsBi3I10 thin film. The solar cell based on the CsBi3I10 perovskite thin film exhibited a high power conversion efficiency of 1.05%, good reproducibility, hysteresis-free behavior, and long-term stability. These results indicate that the performance of all-inorganic Pb-free perovskite solar cells can be further improved.