Defect Passivation for Perovskite Solar Cells: from Molecule Design to Device Performance

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Perovskite solar cells (PSCs) are a rapidly advancing third-generation photovoltaic technology.
• Improving power conversion efficiency requires reducing non-radiative charge recombination caused by defects in metal halide perovskites.

Purpose of the Study:

• To review recent advancements in defect passivation for efficient and stable PSCs.
• To analyze the correlation between molecular structure design and device performance in passivation strategies.

Main Methods:

• Discussing the impact of functional groups, organic frameworks, and side chains on passivation molecule performance.
• Analyzing structure-performance correlations for various passivation molecules.

Main Results:

• Organic small molecule defect passivation is a promising approach for boosting PSC performance.
• Molecular structure significantly influences the photovoltaic parameters of PSCs.

Conclusions:

• A guideline for selecting suitable passivation agents is provided.
• Future trends in PSC passivation strategies are discussed.