Achieving High Fill Factor in Efficient P-i-N Perovskite Solar Cells

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Lead halide perovskite solar cells (PSCs) show commercialization potential, especially inverted p-i-n configurations for flexible substrates and perovskite-silicon tandem cells.
• Despite efficiencies over 25%, inverted PSC research lags behind n-i-p types, with fill factor (FF) underperforming.
• Improving FF is critical for advancing inverted PSC technology.

Purpose of the Study:

• To review recent advancements in achieving high fill factor (FF) in inverted perovskite solar cells (PSCs).
• To identify key factors limiting FF in inverted PSCs and present strategies for improvement.
• To explore methods for minimizing series resistance and undesirable recombination.

Main Methods:

• Summarization of recent research on interfacial optimization.
• Analysis of precursor engineering techniques.
• Review of fabrication techniques to minimize recombination.

Main Results:

• Insufficient carrier extraction and transport efficiency are identified as primary limitations for FF in inverted PSCs.
• Strategies for minimizing series resistance are discussed.
• Advancements in interfacial, precursor, and fabrication methods are presented to enhance FF.

Conclusions:

• Addressing carrier extraction, transport efficiency, and series resistance is key to improving FF in inverted PSCs.
• Continued research on FF optimization is vital for the commercial viability of high-performance inverted PSCs.
• These efforts contribute to the broader commercial application of PSC technology.