Defect Passivation Scheme toward High-Performance Halide Perovskite Solar Cells

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Organic-inorganic halide perovskite solar cells (PSCs) offer simple manufacturing, low cost, and high efficiency.
• Polycrystalline perovskite films in PSCs contain defects at surfaces, interfaces, and grain boundaries, acting as recombination centers.
• These defects limit device efficiency towards the Shockley-Queisser limit.

Purpose of the Study:

• To review defect passivation strategies for perovskite films in PSCs.
• To highlight recent advancements in passivators for improving perovskite film properties.
• To discuss defect management in carrier transport layers for optimized PSCs.

Main Methods:

• Reviewing various passivation strategies: interface, additive, antisolvent, and dopant engineering.
• Analyzing the impact of passivators on perovskite film morphology, grain boundaries, and defect density.
• Examining defects in carrier transporting layers and their passivation.

Main Results:

• Passivation effectively regulates perovskite film morphology, grain boundaries, and defect density.
• Various passivators demonstrate significant improvements in charge recombination and photovoltaic performance.
• Defects in carrier transporting layers also present opportunities for optimization.

Conclusions:

• Effective defect passivation is essential for advancing PSC efficiency and stability.
• Continued research into novel passivators and strategies is vital for future PSC development.
• Addressing defects in both perovskite layers and transport layers is key to unlocking PSC potential.