期刊
JOULE
卷 6, 期 3, 页码 676-689出版社
CELL PRESS
DOI: 10.1016/j.joule.2022.02.003
关键词
-
资金
- Natural Science Foundation of China [51872321, 11874402, 52172260, 52072402, 52102332, 51627803]
Researchers have developed a dual-functional additive that can regulate the crystallization and defects of FA-Cs perovskite film, resulting in improved efficiency and stability of perovskite solar cells.
Formamidinium-cesium (FA-Cs) lead halide has attracted wide interest for enhancing the stability of perovskite solar cells; however, the crystallization of FA-Cs perovskite usually suffers from more complicated intermediate phase transition processes. Herein, we have developed a dual-functional additive consisting of organic ammonium cation and dithiocarbamate anion to regulate the crystallization and defects of the FA-Cs perovskite film. With a synergistic contribution of the cationic and anionic groups, 24.25% efficiency has been achieved in a single cell with excellent operational stability. Under steady-state light illumination and bias voltage, 90% power output of its initial state can still be obtained after 500 h of continuous operation. After enlarging the device from single cell to module, >20.5% efficiency has been realized from a 10.4 cm(2) minimodule by using only an ultralow-cost laser scribing technology. Briefly, this exploitation of cation-anion synergistic effect from dual-functional additives provides more opportunities for promoting the development of perovskite solar cells.
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