Comparing the performances of Cs2TiBr6, Cs2AgBiBr6, and Cs2PtI6 halide compositions in double perovskite photovoltaic devices

Abstract

For commercial purposes in the solar cell field which toxicity and stability of lead-based perovskite solar cells (PSC) are important challenges, the presence of lead-free alternatives like Cs2TiBr6, Cs2AgBiBr6 and Cs2PtI6 double perovskites seems important. The aim of this study is to numerical evaluation of three double perovskite layers as potential photovoltaic (PV) materials in solar cells with fluorine-doped tin oxide (FTO)/TiO2/perovskite/Cu2O/Au structures by using SCAPS-1D software. Different composite layers were optimized and analyzed to enable enhanced performance. Numerical results showed maximum power-conversion efficiency of 18.86%, 18.54%, and 26.50% for the suggested PSCs with Cs2TiBr6, Cs2AgBiBr6, and Cs2PtI6 absorbers. The achieved outcomes confirmed that Cs2PtI6 can contribute significantly to the development of highly efficient lead-free double-perovskite solar cell technology.