Abstract

Hybrid perovskite FAPbI(3) 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, FASnI(3) exhibits highest reported efficiency of similar to 14.6%. To achieve eco-friendly, high efficiency FASnI(3) 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 FASnI(3) can control oxidation of 'Sn'. In this work, various novels HTLs were investigated by substituting PEDOT:PSS in FTO/C-60/FASnI(3)/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.