Phosphonium Halides as Both Processing Additives and Interfacial Modifiers for High Performance Planar-Heterojunction...

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Perovskite solar cells offer promising photovoltaic performance.
• Optimizing perovskite film morphology and charge extraction is crucial for efficiency.

Purpose of the Study:

• To investigate the use of organic halide salts in perovskite solar cells.
• To improve the power conversion efficiency (PCE) of planar-heterojunction devices.

Main Methods:

• Incorporation of organic halide salts as processing additives.
• Utilizing organic halide salts as interfacial modifiers for the cathode.
• Fabrication of perovskite-based planar-heterojunction solar cells.

Main Results:

• Improved morphology of the perovskite light-absorbing layer.
• Enhanced charge collecting properties at the cathode.
• Significant increase in power conversion efficiency (PCE) from 10% to 13%.

Conclusions:

• Organic halide salts are effective in enhancing perovskite solar cell performance.
• The dual role of salts as additives and modifiers is key to efficiency gains.
• This approach offers a viable strategy for developing high-performance perovskite photovoltaics.