High-Performance Semi-Transparent Perovskite Solar Cells with over 22% Visible Transparency: Pushing the Limit...

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Semi-transparent perovskite solar cells (ST-PSCs) are promising for building-integrated photovoltaics.
• Thin perovskite layers increase transparency but reduce light absorption and power conversion efficiency (PCE).

Purpose of the Study:

• To enhance PCE and average visible transmittance (AVT) in ST-PSCs.
• To investigate the effect of 2D-MXene surface engineering on perovskite crystallization and device performance.

Main Methods:

• Utilized high-quality transparent conducting layers and 2D-MXene for surface engineering.
• Employed in situ high-temperature X-ray diffraction to study perovskite crystallization.
• Optimized indium tin oxide as the top electrode.

Main Results:

• MXene interlayer retarded perovskite crystallization, leading to larger grains and fewer grain boundaries.
• Reduced interfacial carrier recombination and increased current density were observed.
• Achieved a ST-PSC with 14.78% PCE and over 26.7% AVT (400-800 nm).

Conclusions:

• 2D-MXene surface engineering is a viable strategy for high-efficiency ST-PSCs.
• The developed devices exhibit remarkable AVT and enhanced operational stability (>1000 h).
• This approach offers a new pathway for advanced perovskite solar cell applications.