Multifunctional ionic liquid to extend the expiration date of precursor solution for perovskite photovoltaics  

多功能离子液体用于延长钙钛矿光伏前驱体溶液的有效期

作　　者：Yazhou Xu Kaiqin Xu Shuqin Xiao Zhi Xing Dengxue Li Zongcai Li Xiaotian Hu Yiwang Chen Ting Hu 徐亚洲;徐凯琴;肖书琴;邢直;李灯学;李宗彩;胡笑添;陈义旺;胡婷(College of Chemistry and Chemical Enginering/Film Energy Chemistry for Jiangxi Provincial Key Laboratory(FEC),Nanchang University,Nanchang 330031,China;Department of Polymer Materials and Engineering,School of Physics and Materials Science,Nanchang University,Nanchang 330031,China;Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education,Jiangxi Normal University,Nanchang 330022,China;Peking University Yangtze Delta Institute of Optoelectronics,Nantong 226010,China)

机构地区：[1]College of Chemistry and Chemical Enginering/Film Energy Chemistry for Jiangxi Provincial Key Laboratory(FEC),Nanchang University,Nanchang 330031,China [2]Department of Polymer Materials and Engineering,School of Physics and Materials Science,Nanchang University,Nanchang 330031,China [3]Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education,Jiangxi Normal University,Nanchang 330022,China [4]Peking University Yangtze Delta Institute of Optoelectronics,Nantong 226010,China

出　　处：《Science China Materials》2024年第11期3658-3665,共8页中国科学（材料科学）（英文版）

基　　金：the support from the National Natural Science Foundation of China(NSFC)(U20A20128,52163019 and 51963016);the support from the Natural Science Foundation of Jiangxi Province(20224ACB214006 and 20232ACB204005)。

摘　　要：At present,the development of perovskite solar cells(PSCs)is progressing rapidly,but the issue of poor stability remains a significant challenge.Achieving a stable precursor solution is crucial for the large-scale production of high-quality PSC films.In this study,we successfully developed a strategy to improve the long-term stability of the precursor solution and improve device performance by employing 1-n-butyl-3-methylimidazolium di-n-butyl phosphate(BMIMBP)as an anti-aging additive.The BP−component inhibits the reactivity of I−and formamidinium ion through multiple chemical bonds,thereby stabilizing the precursor solution.In addition,the BMIM+component,which contains an amino group,can form two-dimensional perovskite internally,further enhancing the device stability.This strategy provides valuable guidance for achieving long-term stability in solar cells.目前,钙钛矿太阳能电池的发展非常迅速,但其稳定性差的问题仍有待解决.稳定的前驱体溶液对于大规模制备高质量的钙钛矿薄膜至关重要.本文通过使用多功能离子液体1-n-丁基-3-甲基咪唑啉,二-n-丁基磷酸盐(BMIMBP)作为抗老化添加剂,成功地开发了一种提高前驱体溶液的长期稳定性和电池性能的策略.BP~-可以通过多种化学键抑制I~-和FA^(+)的反应性,从而提高前驱体溶液的稳定性.此外,带有胺基的BMIM^(+)可以在内部形成二维钙钛矿,增强了器件的稳定性.本文为稳定钙钛矿太阳电池的商业化应用提供了一类行之有效的方法.

关 键 词：perovskite solar cells stability precursor solution ANTI-AGING CRYSTALLIZATION 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程] O645.1[理学—物理化学]