Synergistic Interfacial Lewis-Base Interactions Enable Wide-Bandgap Semitransparent Perovskite Solar Cells with 4.19%...

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Wide-bandgap (WBG) perovskites are promising for semitransparent solar cells.
• High bromide content in WBG perovskites leads to poor film quality and defects.
• Developing high-quality WBG perovskite films is crucial for efficient solar cells.

Purpose of the Study:

• To introduce a novel strategy for improving WBG perovskite film quality.
• To enhance the performance and stability of semitransparent solar cells.
• To investigate the use of 2-(methylsulfonyl)thiophene (MSOT) as an interfacial modulator.

Main Methods:

• Employing 2-(methylsulfonyl)thiophene (MSOT) as a multifunctional interfacial modulator.
• Coordinating MSOT's Lewis base groups (thiophene cation and sulfonyl group) with Pb²⁺.
• Fabricating semitransparent solar cells using MSOT-treated WBG perovskite films.

Main Results:

• MSOT treatment resulted in enlarged grain sizes and improved film morphology.
• Semitransparent solar cells achieved a 12.79% power conversion efficiency (PCE).
• Devices demonstrated excellent operational stability, retaining 90.1% efficiency after 1200 hours of illumination.

Conclusions:

• MSOT is an effective multifunctional interfacial modulator for WBG perovskites.
• This approach enables the development of high-performance semitransparent solar cells.
• The improved film quality and stability are beneficial for building-integrated photovoltaics.