Issue 33, 2015

Formation of organic–inorganic mixed halide perovskite films by thermal evaporation of PbCl2 and CH3NH3I compounds

Abstract

Organic–inorganic hybrid perovskites were prepared by thermal evaporation from precursor materials PbCl2 and CH3NH3I (MAI). The structures of the perovskite films with various ingredients were characterized by X-ray diffraction (XRD), UV-vis absorption, and scanning electron microscopy (SEM). We found that with the addition of MAI material the evaporated PbCl2 films were initially transformed to PbI2, then to standard a stoichiometric perovskite and finally to the MAPbI3·xMAI phase. The film composition ingredients strongly affect the device performance. An unmatched PbCl2 to MAI ratio in the evaporated films resulted in reduced conversion efficiency and higher moisture sensitivity. The planar perovskite solar cells with organic charge layers showed negligible photocurrent hysteresis and delivered a power conversion efficiency of 10.5%.

Graphical abstract: Formation of organic–inorganic mixed halide perovskite films by thermal evaporation of PbCl2 and CH3NH3I compounds

Supplementary files

Article information

Article type
Paper
Submitted
31 Dec 2014
Accepted
06 Mar 2015
First published
06 Mar 2015

RSC Adv., 2015,5, 26175-26180

Formation of organic–inorganic mixed halide perovskite films by thermal evaporation of PbCl2 and CH3NH3I compounds

C. Gao, J. Liu, C. Liao, Q. Ye, Y. Zhang, X. He, X. Guo, J. Mei and W. Lau, RSC Adv., 2015, 5, 26175 DOI: 10.1039/C4RA17316C

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