| 题目： |
Indigo: A Natural Molecular Passivator for Efficient Perovskite Solar Cells |
作者： |
Junjun Guo1, Jianguo Sun1, Long Hu2, Shiwen Fang1, Xufeng Ling1, Xuliang Zhang1, Yao Wang1, Hehe Huang1, Chenxu Han1, Claudio Cazorla4, Yingguo Yang5, Dewei Chu3, Tom Wu3, Jianyu Yuan1，*, Wanli Ma1，* |
单位： |
1 Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, P. R. China. 2 School of Engineering, Macquarie University, Sydney, Australia. 3 School of Materials Science and Engineering, University of New South Wales (UNSW), Sydney, Australia. 4 Department de Física, Universitat Politècnica de Catalunya, Barcelona, Spain. 5 Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, P. R. China. |
摘要： |
Organic-inorganic hybrid lead halide perovskite solar cells have made unprecedented progress in improving photovoltaic efficiency during the past decade, while still facing critical stability challenges. Herein, the natural organic dye Indigo was explored for the first time to be an efficient molecular passivator that assist in the preparation of high-quality hybrid perovskite film with reduced defects and enhanced stability. The Indigo molecule with both carbonyl and amino groups can provide bifunctional chemical passivation for defects. In-depth theoretical and experimental studies show that the Indigo molecules can firmly bind to perovskite surfaces, enhancing the crystallization of perovskite films with improved morphology. Consequently, the Indigo-passivated perovskite film exhibits increased grain size with better uniformity, reduced grain boundaries, lowered defect density and retarded ion migration, boosting the device efficiency up to 23.22%, and ~21% for large-area device (1 cm2). Furthermore, the Indigo passivation can enhance device stability in terms of both humidity and thermal stress. These results provide not only new insights into the multi-passivation role of natural organic dyes but also a simple and low-cost strategy to prepare high-quality hybrid perovskite films for optoelectronic applications based on Indigo derivatives. |
影响因子： |
29.368 |
分区情况： |
一区 |
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