Redirecting wet-interfacial redox pathways for efficient inverted perovskite solar cells.

Authors

Zheng Liang, Boyuan Liu, Yuelong Li, Yalan Zhang, Yi Yang, Shengbin Cheng, Linchuan Ma, Bao Tu, Hua-Chao Liu, Huifen Xu, Yuqi Bao, Minghui Fan, Peide Zhu, Xianfu Zhang, Congqi Li, Hui Zhang, Xinyuan Zhang, Yuheng Li, Guodong Chen, Cheng Liu, Chen Zhu, Chuying Ouyang, Nam-Gyu Park, Yong Zhang

Published in

Science (New York, N.Y.). Volume 393. Issue 6813. Pages 800-806. Aug 20, 2026. Epub Aug 20, 2026.

Abstract

Carbazole-based phosphonic acid self-assembled monolayers (SAMs) are essential for high-efficiency p-i-n perovskite solar cells. However, during processing, these SAMs inevitably contact perovskite inks, where their acidity triggers a dimethyl sulfoxide (DMSO)-mediated iodide redox reaction that imprints device performance, representing a universal bottleneck for inverted devices. We resolve this SAM-triggered redox mechanism and introduce chemistry-matched hydrazide additives to mitigate the degradation. These additives abrogate DMSO activation and redirect unwanted by-products toward benign hydrazide-formamidinium adducts. Consequently, we achieved power conversion efficiencies (PCEs) of 27.7% (certified 27.4%) in small-area (0.06 cm²) cells and 20.1% in 2.0 m² modules, along with T95 lifetimes of ~2000 hours of maximum power point tracking (MPPT) at 85°C and ~1500 hours MPPT at 85°C and 85% relative humidity.

PMID:
42623478
Bibliographic data and abstract were imported from PubMed on 21 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.