Abstract

In the present article, better stability and enhanced optical behavior have been reported by using mixed -cation lead mixed - halide perovskites, [FAxCs1−xPb(IxBr1−x)3]x=0.85 as the active layer while SnO2 as electron transport layer and Spiro-OMeTAD has been chosen as hole transport layer. The design of the cell configuration FTO/SnO2/[FAxCs1−xPb(IxBr1−x)3]x=0.85/Spiro-OMeTAD/Au has been developed with the help of SCAPS-1D software. In this work,15.86 % power conversion efficiency has been attained which is approximately equal to experimentally reported result. Further we have analyzed the comparative investigation of various HTL layers in place of Spiro-OMeTAD. Further MoO3 based device parameters like thickness, bandgap and defect density of absorber layer, effect of interface, shunt and series resistance and temperature were tuned and calculated to get their optimum values. Finally, PCE of 25.85 % was attained for the optimized device structure FTO/SnO2/[FAxCs1−xPb(IxBr1−x)3]x=0.85/MoO3/Au. These outcomes could provide an idea for highly efficient solar cell device fabrication.

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