变废为宝：钙钛矿太阳能电池中过量碘化铅再利用促进二次晶粒生长的预处理策略

IF 27.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Pub Date : 2025-07-11 DOI:10.1002/adma.202508211

Jin Liang, Tianyuan Wang, Yanrun Jia, Jiyuan Guo, Xinmeng Zhuang, Shuainan Liu, Yuhang Fang, Donglei Zhou, Hongwei Song

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引用次数: 0

摘要

钙钛矿太阳能电池近年来取得了显著的进展，但仍有几个关键因素持续阻碍其广泛的商业应用。其中，过量碘化铅（PbI2）在钙钛矿合成过程中的行为尤其令人关注。在退火过程中，过量的促进钙钛矿生长的PbI2将在晶界处积累，这限制了器件的性能并阻碍了其长期适用性。在这项工作中，开发了一种创新的预处理策略，即在退火过程中在钙钛矿薄膜上沉积Cs3ErCl6量子点（QDs），这与传统的退火后沉积QDs的后处理策略不同。可见，PbI2可以与Cs3ErCl6量子点发生反应，使其二次利用，促进钙钛矿在晶界附近的二次生长，从而抑制过量PbI2的形成。预处理后的钙钛矿层具有更好的贴合晶粒，提高了器件的功率转换效率（PCE）和稳定性。预处理后的（FAPbI3） 0.95(MAPbBr3) 0.05钙钛矿太阳能电池的PCE为26.01%。这项工作为抑制PbI2的过度生长提供了新的视角，因此对推进钙钛矿太阳能电池的商业可行性和促进可再生能源的未来前景具有很大的希望。

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Turning Waste into Treasure: Pretreatment Strategy for Promoting Secondary Grain Growth by Reusing Excess Lead Iodide in Perovskite Solar Cells

Perovskite solar cells have witnessed remarkable progress in recent years, yet several pivotal factors persistently impede their widespread commercial adoption. Among these, the behavior of excess lead iodide (PbI2) during perovskite synthesis is particularly concerning. Excess PbI2 that promotes perovskite growth will accumulate at grain boundaries during annealing, which restricts the device performance and hinders its long‐term applicability. In this work, an innovative pretreatment strategy is developed by depositing the Cs3ErCl6 quantum dots (QDs) on the perovskite film during annealing, which is different from the traditional post‐treatment strategy by depositing QDs after annealing. It is evident that PbI2 can react with Cs3ErCl6 QDs, enabling its secondary utilization and promoting the secondary growth of perovskite in the vicinity of grain boundaries to inhibit the formation of excess PbI2. The pretreated perovskite layer has a better fit grain, resulting in higher power conversion efficiency (PCE) and better stability of the device. The (FAPbI3) 0.95(MAPbBr3) 0.05 perovskite solar cell treated using the pretreatment method demonstrates a champion PCE of 26.01%. This work offers new perspectives for inhibiting excessive PbI2 growth and thus holds great promise for advancing the commercial viability of perovskite solar cells and contributing to the future landscape of renewable energy.

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来源期刊

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.