Defects in CsPbX₃ Perovskite: From Understanding to Effective Manipulation for High-Performance Solar Cells

Area of Science:

• Materials Science
• Solid-State Physics
• Photovoltaics

Background:

• All-inorganic metal perovskite (CsPbX3) materials offer thermal stability and tunable band gaps for tandem solar cells.
• Defects in CsPbX3 perovskite solar cells (PSCs) significantly reduce power conversion efficiency (PCE), hindering performance below theoretical limits.

Purpose of the Study:

• To review recent advancements in defect passivation techniques for CsPbX3 PSCs.
• To analyze the impact of defects on device performance and explore strategies for defect manipulation.

Main Methods:

• Discussion of defect physics, tolerance, self-healing, and their effects on photovoltaic properties.
• Comparison of techniques for defect identification (quantitative and qualitative analysis).
• Detailed examination of defect passivation mechanisms and classification of passivation agents.

Main Results:

• Non-radiative recombination is identified as a key factor in open-circuit voltage (Voc) losses.
• Various defect passivation strategies and their effectiveness are evaluated.
• Understanding defect behavior is crucial for enhancing PSC performance.

Conclusions:

• Defect passivation is essential for improving the PCE of CsPbX3 PSCs.
• Further research into defect manipulation is needed to advance perovskite solar cell technology.
• Targeted passivation strategies can unlock the full potential of CsPbX3 materials.