Investigation of Carrier Transport Materials for Performance Assessment of Lead-Free Perovskite Solar Cells

This present work emphasizes the numerical modeling of lead-free methylammonium tin tri-iodide (MASnI(3))-based perovskite solar cells (PSCs) under optimizing preconditions. The prior selection of the perovskite material of MASnI(3) is feasible for a more extended absorption spectrum due to a smaller bandgap of 1.3 eV than higher bandgap methylammonium lead tri-iodide (MAPbI(3))-based PSC and the factor of lesser toxicity. Furthermore, to enhance the efficiency of the device, selecting potentially steadier and superior carrier transport materials (CTMs) is among the most effective approaches for optimizing device outputs. Among the proposed materials, a prior selection of copper antimony sulfide (CuSbS2) and zinc oxide (ZnO) as CTMs with an optimized thickness of MASnI(3) material has offered a higher power conversion efficiency (PCE) of 22.16% under the photoillumination AM1.5. Furthermore, the less-defective PSC device can also be helpful for further device optimization and futuristic development.

Automated summary

This study focuses on the numerical modeling of lead-free methylammonium tin tri-iodide based perovskite solar cells. The selection of MASnI(3) as the perovskite material allows for a wider absorption spectrum and lower toxicity compared to higher bandgap MAPbI(3)-based PSCs. By using copper antimony sulfide and zinc oxide as carrier transport materials and optimizing the thickness of MASnI(3), the device achieved a higher power conversion efficiency.