Dual-Source Precursor Approach for Highly Efficient Inverted Planar Heterojunction Perovskite Solar Cells

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Mixed-cation perovskite solar cells achieve high efficiencies using methylammonium and formamidinium.
• Current fabrication relies on antisolvent methods, which present challenges like poor reproducibility and use of hazardous solvents.
• These limitations hinder scalable manufacturing of efficient perovskite solar cells.

Purpose of the Study:

• To develop a simplified fabrication process for high-quality mixed-cation perovskite thin films.
• To eliminate the need for antisolvent treatments in perovskite solar cell fabrication.
• To achieve high power conversion efficiencies in perovskite solar cells using a scalable method.

Main Methods:

• A novel dual-source precursor approach was employed to deposit perovskite thin films.
• The fabrication process avoided the use of any antisolvent treatments.
• Perovskite films were integrated into planar heterojunction solar cell architectures.

Main Results:

• High-quality, mirror-like mixed-cation perovskite thin films were successfully fabricated.
• The fabricated perovskite solar cells achieved a power conversion efficiency of 20.15%.
• Negligible hysteresis in current density-voltage characteristics and a stabilized power output near 20% were observed.

Conclusions:

• A simple, antisolvent-free dual-source precursor method enables efficient perovskite solar cell fabrication.
• This approach overcomes limitations of traditional antisolvent methods, improving reproducibility and safety.
• The findings support the development of scalable manufacturing processes for high-performance perovskite solar cells.