Abstract
The perovskite solar cell structures: FTO/SnO2/(CH3NH3PbI3 or CH3NH3SnI3)/CuInSe2/Ag have been proposed and numerically analyzed using SCAPS-1D software. The performance of the designed cell structures are optimized by studying the effect of layers’ thickness, the electron affinity of transporting layers, and the bandgap of the hole transporting layer. The optimized power conversion efficiency of 20.36% and 18.89% are obtained for solar cells based on CH3NH3PbI3 and CH3NH3SnI3 absorbers, respectively. In addition, the effect of defect density in the perovskite layer and at the interfaces between different layers are investigated. The manuscript findings revealed that CuInSe2 nanocrystals act as an efficient inorganic HTL, and the defect density is a critical factor for affecting the performance of the cells.
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