Lead-Free FACsSnI₃ Based Perovskite Solar Cell: Designing Hole and Electron Transport Layer.

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Lead-based perovskite solar cells show high efficiency but face toxicity issues hindering commercialization.
• Tin-based perovskites, like FACsSnI3, offer a non-toxic alternative for solar cell applications.
• Limited data exists on optimizing FACsSnI3 solar cells, especially regarding charge transport layers.

Purpose of the Study:

• To simulate and model key design variables for electron and hole-transport layers in FACsSnI3 solar cells.
• To identify optimal parameters for electron affinity, band gap, film thickness, and doping density.
• To guide the development of efficient, lead-free perovskite solar cells.

Main Methods:

• Iterative simulation and modeling of electron and hole-transport layer properties.
• Separate optimization of transport layer variables.
• Tuning of the FACsSnI3 absorber layer thickness.

Main Results:

• Identified optimal electron affinity, band gap, film thickness, and doping density for transport layers.
• Achieved a maximum power conversion efficiency exceeding 24% for the FACsSnI3 solar cell.
• Demonstrated the potential of FACsSnI3 as a high-performance, lead-free photovoltaic material.

Conclusions:

• The study provides essential design guidelines for future lead-free perovskite solar cell research.
• Optimized transport layers and absorber thickness are critical for high photovoltaic efficiency.
• FACsSnI3 perovskites represent a promising direction for sustainable solar energy technology.