Stabilizing Sputtered NiO <sub>x</sub> via In Situ Dissociative Adsorption Passivation for Efficient Perovskite Solar Cells
Abstract
ABSTRACT Sputtered nickel oxide (NiO x ) is an industrially compatible hole transport layer for perovskite solar cells (PSCs), yet its practical deployment is limited by interfacial instability arising from disordered Ni 3+ species and unfavorable reactions with perovskite absorbers. Here, we introduce an in situ dissociative adsorption passivation (IDAP) strategy using bromoacetamide (BAA) to stabilize sputtered NiO x . In this approach, Br − ions act as site‐blockers by coordinating with surface Ni, suppressing interfacial disorder and stabilizing Ni 3+ species, while the amide group provides dual anchoring: N−H···O hydrogen bonding strengthens attachment to NiO x , and the carbonyl group (C═O) passivates the uncoordinated Pb 2+ located at or near the interface between the NiO x and the perovskite films. These cooperative efforts reduce trap states, suppress interfacial redox reactions, and mitigate defect‐driven degradation under thermal stress. PSCs incorporating BAA‐NiO x achieve a champion power conversion efficiency (PCE) of 26.31% along with a certified PCE of 26.07%, while the larger‐area PSCs (1 cm 2 ) maintain 25.48% efficiency. This is one of the highest efficiencies reported for NiO x ‐based PSCs. In addition, the encapsulated cell retains 93% of its initial performance after 1500 h of continuous operation.
Article Details
Authors (29)
Chenghao Ge
Huanyu Zhang
Shikai Chang
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Kaixin Du
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Yang Li
Yi Ji
State Key Laboratory of Catalysis
Shuilong Kang
State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano & Soft Materials (FUNSOM)
Rongbin Wang
Yanbo Wang
Department of Materials Science and Engineering, City University of Hong Kong
Yansen Guo
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Zewu Feng
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Xueqi Wu
Yitong Liu
Peking-Tsinghua Center for Life Science, Academy for Advanced Interdisciplinary Studies, Peking University
Xin Li
Yige Peng
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Yinhua Li
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Yunhao Liang
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Yang Zhang
Shipeng Yu
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou China
Yurou Zhang
Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering
Chaopeng Huang
Zhejiang Baima Lake Laboratory Co., Ltd. Hangzhou China
Na Li
Jingsong Sun
Zhejiang Baima Lake Laboratory Co., Ltd. Hangzhou China
Zhongyao Jiang
Laoshan Laboratory
Haifeng Gao
Xuran Zhu
China Electric Power Research Institute Co., Ltd. Beijing China
Youyong Li
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
Xiao‐Hong Zhang
Institute of Functional Nano & Soft Materials (FUNSOM) Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University Suzhou Jiangsu P. R. China
Jun Peng
State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry