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Effect of active layer thickness and angle of incidence on the efficiency of planar heterojunction lead-free tin perovskite solar cell

In this paper, lead-free tin perovskite solar cell has been investigated using 2D-Sentaurus TCAD simulation. A planar structure consisting of PEDOT:PSS as the hole transport layer, FASnI3 as the absorber layer and PCBM as the electron transport layer has been simulated. Using the physics-based optical transfer matrix and drift-diffusion models, the effect of thicknesses of the absorber layer and angle of incidence have been investigated. The results show that in order to achieve the best efficiency, at normal incidence, thickness of FASnI3 absorber layer should be 120 nm thick. In addition, the angle of incidence of the AM1.5G spectrum should be around 45°. At this angle, a maximum efficiency of 11.02% was obtained for a thickness of 80nm.