Abstract

Hybrid perovskite FAPbI3 is highly suitable candidate for photovoltaics. The major concerns are dissolution and hazardous nature of ‘Pb’, which results in the major environmental pollution. Toxicity can be overcome by replacing ‘Pb’ with ‘Sn’ which is a highly suitable alternative in place of ‘Pb’. Among the non-hazardous perovskites, FASnI3 exhibits highest reported efficiency of ∼ 14.6%. To achieve eco-friendly, high efficiency FASnI3 PV, issues associated with it needs to be addressed. Primary issue is conversion of ‘Sn2+’ state to ‘Sn4+’. To address this issues ‘Sn’ oxidation need to suppress. Introducing stable and high conducting HTL over FASnI3 can control oxidation of ‘Sn’. In this work, various novels HTLs were investigated by substituting PEDOT:PSS in FTO/C60/FASnI3/HTL/Au device. Among all HTLs, CuSbS2 showed highest efficiency (16.05%). PV simulation results and their analysis of all devices are reported in this work.