钙钛矿(结构)
水溶液
甲脒
能量转换效率
杂质
碘化物
化学工程
材料科学
化学
化学计量学
无机化学
有机化学
光电子学
工程类
作者
Peide Zhu,D. Z. Wang,Yong Zhang,Zheng Liang,Jingbai Li,Jie Zeng,Jiyao Zhang,Yintai Xu,Siying Wu,Zhixin Liu,Xianyong Zhou,Bihua Hu,Feng He,Lin Zhang,Xu Pan,X. X. Wang,Nam‐Gyu Park,Baomin Xu
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2024-02-02
卷期号:383 (6682): 524-531
被引量:3
标识
DOI:10.1126/science.adj7081
摘要
High-purity precursor materials are vital for high-efficiency perovskite solar cells (PSCs) to reduce defect density caused by impurities in perovskite. In this study, we present aqueous synthesized perovskite microcrystals as precursor materials for PSCs. Our approach enables kilogram-scale mass production and synthesizes formamidinium lead iodide (FAPbI3) microcrystals with up to 99.996% purity, with an average value of 99.994 ± 0.0015%, from inexpensive, low-purity raw materials. The reduction in calcium ions, which made up the largest impurity in the aqueous solution, led to the greatest reduction in carrier trap states, and its deliberate introduction was shown to decrease device performance. With these purified precursors, we achieved a power conversion efficiency (PCE) of 25.6% (25.3% certified) in inverted PSCs and retained 94% of the initial PCE after 1000 hours of continuous simulated solar illumination at 50°C.
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