Fig. 3
From: Progress and outlook of Sn–Pb mixed perovskite solar cells
Materials characteristics of Sn–Pb mixed perovskite and their status in terms of photovoltaic properties. a Absorption coefficient of MAPbI3 and MASnI3. Reproduced with permission from [14], copyright American Chemical Society, 2018. b PL lifetime for different Sn concentrations in (FA0.83Cs0.17)(Pb1-xSnx)I3 materials. Reproduced with permission from [49], copyright Royal Society of Chemistry, 2020. c Photothermal deflection spectroscopy (PDS) spectra of MASn1-xPbxI3 perovskite film with varying Sn concentration. d Normalized PDS and EQE spectra of MASn1-xPbxI3 perovskite. Reproduced with permission from [50], copyright John Wiley and Sons, 2016. e Comparison of each parameter of the current highest efficiency silicon, Pb-based and Sn–Pb mixed solar cells as a percentage compared to the theoretical efficiency SQ-limit [10, 40, 51]