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硫氰酸盐熔盐制备高效(>20%)稳定的全无机三碘化铯铅太阳能电池
作者:小柯机器人 发布时间:2021/4/7 12:58:52

中国科学院物理研究所孟庆波团队通过硫氰酸盐熔盐制备高效(>20%)稳定的全无机三碘化铯铅太阳能电池。相关研究成果于2021年4月1日发表于国际一流学术期刊《德国应用化学》。

除了广泛应用的表面钝化外,工程化薄膜晶化是提高全无机钙钛矿型太阳能电池性能的重要途径。

该文中,研究人员开发了一种充分释放和利用SCN的配位活性,沉积高质量的CsPbI3薄膜的脲-硫氰酸铵(UAT)熔盐改性策略,用于高效稳定的全无机太阳能电池。UAT是由尿素和NH4SCN中NH4+之间的氢键相互作用得到的。

通过UAT,CsPbI3薄膜的晶体质量得到了显著改善,单指数电荷复合寿命超过30ns。由于这些优点,电池效率提高到20%以上(稳态效率为19.2%),工作超过1000h具有良好的稳定性。研究结果展示了CsPbI3相关光电器件的一条很有前途的发展路线。

附:英文原文

Title: Efficient (>20%) and Stable All‐inorganic Cesium Lead Triiodide Solar Cell Enabled by Thiocyanate Molten Salts

Author: Bingcheng Yu, Jiangjian Shi, Shan Tan, Yuqi Cui, Wenyan Zhao, Huijue Wu, Yanghong Luo, Dongmei Li, Qingbo Meng

Issue&Volume: 2021-04-01

Abstract: Besides widely‐used surface passivation, engineering the film crystallization is an important and more fundamental route to improve the performance of all‐inorganic perovskite solar cells. Herein, we have developed a urea‐ammonium thiocyanate (UAT) molten salt modification strategy to fully release and exploit coordination activities of SCN‐ to deposit high‐quality CsPbI3 film for efficient and stable all‐inorganic solar cells. The UAT is derived by the hydrogen bond interactions between urea and NH4+ from NH4SCN. With the UAT, the crystal quality of the CsPbI3 film has been significantly improved and a long single‐exponential charge recombination lifetime of over 30 ns has been achieved. With these benefits, the cell efficiency has been promoted to over 20% (steady‐state efficiency of 19.2%) with excellent operational stability over 1000 h. These results demonstrate a promising development route of the CsPbI3 related photoelectric devices.

DOI: 10.1002/anie.202102466

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202102466

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx