Acid-Base Complexation Induced Dipole Engineering for Durable Inverted Perovskite Photovoltaics.

Authors

Ke Wang, Zhiyuan Xu, Ru Li, Yingguo Yang, Zhihao Guo, Zhijun Li, Yuhao Song, Ke Yang, Zhigang Zang

Published in

Advanced materials (Deerfield Beach, Fla.). Pages e74438. Aug 05, 2026. Epub Aug 05, 2026.

Abstract

Thermally unstable buried interfaces hinder the commercialization of inverted perovskite solar cells (PSCs). Although self-assembled monolayers (SAMs) serve as promising hole-selective contacts, their inadequate coverage and weak thermal anchoring cause energy loss and structural degradation. Here, we introduce a dipole-engineering strategy by incorporating 4-aminopyridine (4-AP) into the Me-4PACz matrix to form a robust electrostatic complex via acid-base complexation. This approach suppresses aggregation, ensures uniform coverage, enables a vertical molecular orientation, and enhances the interfacial dipole moment from 1.64 to 8.34 Debye, thereby improving hole extraction. The resulting small-area (0.09 cm²) inverted PSC achieves a power conversion efficiency (PCE) of 27.06% and an open-circuit voltage (V_OC) of 1.194 V. This approach also enables large-area modules (655.2 cm²) with an efficiency of 20.3% (certified 20.11%) and a fill factor of 79.9%. Additionally, the devices demonstrate exceptional thermal stability, retaining 90.1% and 89.3% of their initial PCE after 1000 h at 85°C and 200 thermal cycles, respectively. This work provides a generalizable pathway toward durable and high-performance perovskite photovoltaics by leveraging supramolecular interactions for interfacial dipole engineering.

PMID:
42554238
Bibliographic data and abstract were imported from PubMed on 05 Aug 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.