Highly Efficient Perovskite Solar Cells Based on a Zn₂SnO₄ Compact Layer.

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Perovskite solar cells (PSCs) are a promising photovoltaic technology.
• Efficient charge extraction and transport are crucial for high PSC performance.
• Developing stable and effective compact layers is essential for PSC advancement.

Purpose of the Study:

• To develop a novel synthesis route for Zn2SnO4 films.
• To investigate the application of Zn2SnO4 as a compact layer in PSCs.
• To evaluate the impact of Zn2SnO4 on PSC efficiency and performance.

Main Methods:

• A reflux condensation route was employed for Zn2SnO4 film synthesis.
• The synthesized Zn2SnO4 film was utilized as a compact layer in PSCs.
• Photovoltaic performance and device characteristics were analyzed.

Main Results:

• The Zn2SnO4 compact layer exhibited high electron mobility and suitable energy band structure.
• Efficient carrier extraction and electron transport were achieved.
• Complete coverage of the FTO substrate by Zn2SnO4 prevented direct contact with the perovskite layer.
• Charge recombination was significantly suppressed.
• A perovskite solar cell incorporating the Zn2SnO4 compact layer reached a power conversion efficiency of 20.1%.

Conclusions:

• The developed Zn2SnO4 compact layer is highly effective in enhancing PSC performance.
• The Zn2SnO4 layer facilitates efficient charge dynamics and minimizes recombination losses.
• This work demonstrates the potential of Zn2SnO4 as a superior compact layer material for high-efficiency perovskite solar cells.