Dual-Site-Binding Molecule

Passivates Interfacial Defects

A molecule bearing both carbonyl and methylthio groups that simultaneously passivates buried-interface defects and regulates perovskite crystallization in inverted PSCs.

Ying-Ying, Zhang · Ye, Yongchun · Jisen, Zhang · Binghao, Lv · Zhang, Liujiang · Shi, Biyun · Cao, Qiaojun · Ye, Qiufeng · Gao, Xingyu · Xie, Haipeng · Shi, Tingting · Dou, Weidong

Journal of Materials Chemistry A 2026

Specifications

Champion power conversion efficiency

{'zh': '25.07', 'en': '25.07'} %

Stabilized power conversion efficiency

{'zh': '25.00', 'en': '25.00'} %

Efficiency retention

{'zh': '94', 'en': '94'} %

Advantages

Dual-site passivation

Carbonyl and methylthio groups interact strongly with undercoordinated Pb2+, reducing trap states.

Crystallization regulated

The modified interface promotes the crystallinity of perovskite grains.

Energy alignment improved

The modified interface improves energy level alignment.

Durable after aging

Devices retain over 94% of initial efficiency after 2400 h aging.

Applications

• Perovskite solar cells：Enhance efficiency and stability of inverted PSCs
• Photovoltaic interface modification：Passivate defects and regulate crystallization at buried interface
• Photoelectric conversion layers：Improve charge transport and reduce recombination in perovskite layer
• Flexible photovoltaic modules：Spin-coating compatible with flexible substrates