A comparative numerical approach between lead-free inorganic Cs2TiBr6 and Cs2PtI6-based perovskite solar cells

Abstract

Lead halide perovskite has drawn much interest recently because of its impressive optoelectronic performance and unique characteristics. However, concerns regarding its toxicity and instability have hindered the complete industrialization of this material. We propose and investigate the performance of lead-free, eco-friendly, inorganic perovskite solar cells (PSCs) based on Cs2TiBr6 and Cs2PtI6 absorbers in this study. The investigation involved the examination of several parameters, including absorber thicknesses, absorber defect densities, and charge transport material thicknesses. Our findings indicate that Cs2PtI6-based PSCs exhibit superior performance, with an efficiency of 24.49%. In comparison, it is found that the efficiency of PSCs based on Cs2TiBr6 is just 9.81%. The study provides valuable insights into the design of high-performance PSCs for commercial exploitation.

Keywords

• PSCs
• Cesium platinum iodide
• Cesium titanium bromide
• Lead-free perovskite
• SCAPS-1D