Determination of Efficiency Parameters in tin Halide Perovskite Solar Cells

Abstract

Perovskite solar cells have gained significant attention in photovoltaic research. Just within a few years, the efficiencies of perovskite-based solar cells have been improved significantly to over 20% which makes them comparably efficient to silicon-based solar cells. The reason for such high recorded efficiencies are due to perovskites ease of processing, a high carrier diffusion length, low exciton binding energy and high absorption coefficient. Theoretical calculations were carried out based on the detailed balanced model on some Tin Halide Perovskite absorbers. For CH₃ NH₃ SnI₃ , results obtained for V _oc, J_oc , FF and n are 1.14V, 34.4 mA/cm ₂, 0.725and 5.56% respectively. For CH₃ NH₃ SnIBr₂ values obtained for  V_oc , J _oc, FF are 1.37V, 24.03mA/cm², 0.784 and 5.22% respectively. For CH₃ NH₃ SnI₂ Br values obtained for V_oc , J_oc , FF are 1.38V, 20.04 mA/cm², 0.810 and 4.69% Also for CH₃ NH₃ SnBr₃ , results obtained for V_oc , J_oc , FF are 1.44V, 14.52mA/cm², 0.881 and 3.21% respectively.