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Improving stability and efficiency of perovskite solar cells via a cerotic acid interfacial layer
Surfaces and Interfaces ( IF 6.2 ) Pub Date : 2021-04-29 , DOI: 10.1016/j.surfin.2021.101163
Xiangyu Kong , Zhuoxi Li , Yue Jiang , Zhengjie Xu , Shien-Ping Feng , Guofu Zhou , Jun-Ming Liu , Jinwei Gao

Organic-inorganic hybrid perovskite solar cells (PSCs) are one of the most promising technologies in the field of photovoltaics due to its high-power conversion efficiency (PCE) and easy fabrication process. However, its moisture stability has posed a crucial hurdle towards its further commercialization. In this paper, we have introduced an interfacial layer, cerotic acid (CA), inspired from the honeycomb, to modify the surface of perovskite films, thus improving moisture stability. The PCE of the CA modified PSCs retained ~81% of its initial value after aging 30 days at a relative humidity of 35%, in sharp contrast with the pristine devices, only 19% retention of its initial value. In addition, the C=O group in CA was found effectively passivate the unsaturated Pb sites in perovskite films and further contributes to the PCE of devices. Overall, this work has demonstrated a simple, potentially low-cost, and environmentally friendly method to improve not only the photovoltaic performance but also the moisture stability.



中文翻译:

通过铈酸界面层提高钙钛矿太阳能电池的稳定性和效率

有机-无机杂化钙钛矿太阳能电池(PSC)由于其高功率转换效率(PCE)和易于制造的工艺而成为光伏领域最有前途的技术之一。然而,其水分稳定性已成为其进一步商业化的关键障碍。在本文中,我们从蜂窝中引入了一种界面层,即铈酸(CA),以修饰钙钛矿薄膜的表面,从而改善了水分稳定性。该PCE在35%的相对湿度下老化30天后,CA修饰的PSC保留了其初始值的约81%,与原始设备形成鲜明对比的是,其原始值仅保留了19%。另外,发现CA中的C = O基团有效地钝化钙钛矿膜中的不饱和Pb位点,并且进一步有助于器件的PCE。总的来说,这项工作证明了一种简单,潜在的低成本且环保的方法,不仅可以提高光伏性能,而且可以提高湿度稳定性。

更新日期:2021-05-08
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