Efficient Wide-Bandgap Mixed-Cation and Mixed-Halide Perovskite Solar Cells by Vacuum Deposition

Summary

This paper presents a vacuum deposition method for creating homogeneous wide-bandgap perovskite films with controlled Br/Cs content, achieving solar cells with up to 16.8% efficiency and good stability.

Key findings

• Homogeneous perovskite films with decoupled Br/Cs content achieved.
• Bandgap in the 1.7-1.8 eV range obtained.
• Solar cells reached 16.8% efficiency.
• Promising stability demonstrated, retaining 90% efficiency after 2 weeks.

Methods

• Vacuum deposition technique.
• Fabrication of mixed-cation and mixed-halide perovskite films.
• Device fabrication and characterization.
• Stability testing under operation.

Limitations

• Specific details on the vacuum deposition process parameters are not fully elaborated.
• The study focuses on a specific bandgap range (1.7-1.8 eV).

Applications

• Perovskite solar cells.
• Tandem solar cells (implied by wide bandgap).