Perovskite Solar Cells Based on Low-Temperature Processed Indium Oxide Electron Selective Layers

Area of Science:

• Materials Science
• Photovoltaics
• Nanotechnology

Background:

• Indium oxide (In2O3) is a key n-type semiconductor for optoelectronics.
• Perovskite solar cells (PSCs) require efficient electron selective layers (ESLs) for optimal performance.

Purpose of the Study:

• To investigate the use of low-temperature solution-processed In2O3 nanocrystalline film as an ESL in PSCs.
• To enhance PSC efficiency by optimizing In2O3 film properties and surface modification.

Main Methods:

• Fabrication of In2O3 nanocrystalline films via low-temperature solution processing.
• Optimization of precursor solution concentration and annealing temperature for In2O3 films.
• Introduction of phenyl-C61-butyric acid methyl ester (PCBM) for surface passivation.

Main Results:

• Achieved over 13% efficiency in In2O3-based PSCs after optimization.
• PCBM modification passivated defects and improved ESL uniformity, reducing charge recombination.
• Enhanced PSC efficiency to 14.83% with improved V(OC), J(SC), and FF.

Conclusions:

• Low-temperature solution-processed In2O3 is a viable and effective ESL for PSCs.
• PCBM surface passivation significantly boosts the performance of In2O3-based PSCs.
• This approach offers a promising route for efficient and stable perovskite solar cell development.