Interdigitated Hierarchical Integration of an Efficient Lateral Perovskite Single-Crystal Solar Cell

Area of Science:

• Materials Science
• Renewable Energy
• Solid-State Physics

Background:

• Perovskite solar cells offer high efficiency potential.
• Scalable manufacturing of high-quality perovskite films remains a challenge.
• Lateral photovoltaic devices require precise crystal growth control.

Purpose of the Study:

• To develop a scalable method for producing single-crystal perovskite thin films.
• To investigate the photovoltaic performance of these lateral single-crystal perovskite materials.
• To demonstrate the integration of these films into multi-unit photovoltaic devices.

Main Methods:

• Geometrically confined lateral crystal growth (GC-LCG) on a patterned rolling mold.
• Fabrication of single-crystal perovskite thin films.
• Fabrication and testing of interdigitated electrode units in series and parallel configurations.

Main Results:

• A record solar cell efficiency of 9.50% was achieved under 0.1 sun with 1.5 μm electrode spacing.
• Integrated interdigitated electrode units (1x4, 4x1, 4x4) showed maximum efficiencies of 7.99%, 8.19%, and 7.96%, respectively.
• High performance was observed under various light intensities, including 8.13% efficiency under indoor lighting (1000 lux).

Conclusions:

• The GC-LCG method is a scalable approach for high-quality lateral single-crystal perovskite films.
• The developed perovskite solar cells demonstrate significant efficiency under various conditions.
• This work represents a key advancement for next-generation lateral photovoltaics and module integration.