Low-temperature solution-processed SnO₂ electron transport layer modified by oxygen plasma for planar perovskite...

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Tin oxide (SnO2) is a promising electron transport layer (ETL) for perovskite solar cells due to its optical bandgap, electron mobility, and transparency.
• Conventional SnO2 ETL fabrication requires high annealing temperatures (180-200 °C), limiting its use in flexible electronics.

Purpose of the Study:

• To develop a low-temperature fabrication method for SnO2 ETLs.
• To enhance the efficiency of perovskite solar cells using surface modification.
• To assess the compatibility of the developed method with flexible device applications.

Main Methods:

• Low-temperature deposition of SnO2 ETL.
• Surface modification of SnO2 ETL using oxygen plasma treatment.
• Fabrication and efficiency testing of perovskite solar cells with modified SnO2 ETLs.

Main Results:

• Oxygen plasma treatment significantly improved the wettability of the low-temperature processed SnO2 ETL.
• The perovskite grain size was increased by the oxygen plasma treatment.
• The power conversion efficiency of the perovskite solar cells increased from 2.3% to 15.30%.

Conclusions:

• Oxygen plasma treatment is an effective method for enhancing perovskite solar cell efficiency at low temperatures.
• The low-temperature processing and oxygen plasma modification are compatible with flexible device fabrication.
• This approach offers a viable pathway for developing efficient and flexible perovskite solar cells.