A Buried Sulfonate Molecular Bridge for Synchronous Charge Transport and Defect Passivation in High‑Performance Perovskite Solar Cells (IMAGE)

Shanghai Jiao Tong University Journal Center

A Buried Sulfonate Molecular Bridge for Synchronous Charge Transport and Defect Passivation in High‑Performance Perovskite Solar Cells

Caption

  • Bridging the 2-formylbenzenesulfonic acid salt molecule at the self-assembled molecules/perovskite buried interface enhances charge transfer via π–π stacking and passivates defects via Pb2+ coordination, yielding a superior power conversion efficiency of 26.21%.
  • The modified devices demonstrate exceptional storage stability, retaining over 90% of their initial power conversion efficiencies after 4500 h in a nitrogen atmosphere without encapsulation.
  • Na+ from 2-formylbenzenesulfonic acid salt effectively occupy A-site vacancies in the perovskite lattice, reinforcing structural stability and substantially improving device longevity.

Credit

Leying Zha, Weilu Ding, Yalin Gao, Xiao Wu, Tinglu Song, Changhua Li, Chenghao Duan*, Xinhui Lu, Guilong Cai*, Suojiang Zhang*.

Usage Restrictions

Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted.

License

CC BY-NC-ND

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.