Ultraviolet‐Controlled Radical Dopants: Suppressing Unpredictable Oxidation and Lithium Migration in Perovskite Solar Cells
Abstract
Abstract Perovskite solar cells (PSCs) have achieved parity in efficiency with silicon‐based solar cells. This dependency introduces stability challenges and complicates device fabrication due to the traditional air‐oxidation doping process, which is time‐consuming, unpredictable, and requires continuous monitoring of device variability. Here, we propose two triphenyl sulfonium (TPS) salts as UV‐light‐triggered radical‐generating dopants for 2,2′,7,7′‐tetrakis [ N,N ‐di(4‐methoxyphenyl) amino]‐9,9′‐spirobifluorene(spiro‐OMeTAD). These dopants eliminate the need for air‐based oxidation, thereby simplifying fabrication while enhancing the electrical properties of spiro‐OMeTAD through efficient p‐type doping. Using this approach, we achieved a champion power conversion efficiency of 25.18%, surpassing the performance of traditional doping methods. Notably, PSCs incorporating TPS dopants and cost‐effective silver top‐electrodes demonstrated exceptional stability under various operational conditions. This work presents a scalable, cost‐effective doping strategy that addresses critical stability‐efficiency trade‐offs in PSCs, positioning them as viable contenders for commercial renewable energy applications.
Article Details
Authors (15)
Zihao Li
State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering
Jinzheng Zhao
Key Laboratory of Flexible Electronics (KLOFE) Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University 5 Xinmofan Road Nanjing 210009 P.R. China
Yikai Yun
Chongyu Zhong
Ying Chu
Institute of Carbon Neutrality Zhejiang Wanli University Ningbo 315100 P.R. China
Bingxu Liu
Institute for Protein Design, University of Washington, Seattle, WA, USA.
Dongmin Qian
Shan Chang
Key Laboratory of Flexible Electronics (KLOFE) Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University 5 Xinmofan Road Nanjing 210009 P.R. China
Shaoyu Chen
Zuo Zhang
Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Key Laboratory of Polymer Chemistry & Physics, National Biomedical Imaging Center
Xiaonan Jin
Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University Nanjing Jiangsu 211816 China
Jingjin Dong
State Key Laboratory of Flexible Electronics (LoFE) & Institute of Advanced Materials (IAM) School of Flexible Electronics (Future Technologies) Nanjing Tech University (NanjingTech) Nanjing China
Jiupeng Cao
State Key Laboratory of Flexible Electronics (LoFE) & Institute of Advanced Materials (IAM) School of Flexible Electronics (Future Technologies) Nanjing Tech University (NanjingTech) Nanjing China
You Liu
Tianshi Qin