A PCBM Electron Transport Layer Containing Small Amounts of Dual Polymer Additives that Enables Enhanced Perovskite...

Area of Science:

• Materials Science
• Renewable Energy

Background:

• Perovskite solar cells (PSCs) show promise for renewable energy but suffer from performance losses due to hysteresis.
• Electron transport layers (ETLs) are crucial for efficient PSC operation and stability.

Purpose of the Study:

• To develop a new electron transport layer (ETL) for high-performance perovskite solar cells (PSCs).
• To address and minimize hysteresis in PSCs through innovative ETL design.

Main Methods:

• Fabrication of a polymer/PCBM hybrid ETL.
• Doping the PCBM layer with polystyrene (an insulating polymer) and PFNOX (an amine-containing polymeric semiconductor).
• Characterization of PSCs incorporating the new ETL.

Main Results:

• Achieved a high power conversion efficiency (PCE) of 16.2% in PSCs.
• Demonstrated negligible hysteresis, a significant improvement over conventional methods.
• The hybrid ETL effectively passivates defects and improves charge extraction.

Conclusions:

• The developed polymer/PCBM hybrid ETL is highly effective for high-performance PSCs.
• Doping with polystyrene and PFNOX is key to reducing hysteresis and enhancing device stability.
• This approach offers a promising strategy for advancing PSC technology.