Halide exchange in the passivation of perovskite solar cells with functionalized ionic liquids

Xiao Xin Gao, Bin Ding, Yi Zhang, Shunlin Zhang, Roland Christopher Turnell-Ritson, Hiroyuki Kanda, Mousa Abuhelaiqa, Naoyuki Shibayama, Wen Luo, Mo Li, Farzaneh Fadaei Tirani, Rosario Scopelliti, Sachin Kinge, Andreas Züttel, Dunru Zhu, Bao Zhang, Yaqing Feng, Zhaofu Fei, Mohammad Khaja Nazeeruddin, Paul J. Dyson

科研成果: 期刊稿件文章同行评审

15 引用 (Scopus)

摘要

Applying additives to perovskite precursor solutions is an effective way to passivate perovskite films for the construction of perovskite solar cells (PSCs) with increased power-conversion efficiencies (PCEs) and enhanced stabilities. Ionic liquids (ILs) with halide anions have been applied as additives. Here, we report the application of imidazolium-based ILs, containing the nitrile functionality in the cation and chloride anion, as additives for triple-cation (Cs+, formamidinium [FA+], methylammonium [MA+]) PSCs. We found that a Cl-I exchange takes place between the I anion of the triple-cation precursors and the Cl anion of the IL. The fabricated PSCs containing perovskite films with the ILs show high PCEs (in the best case 22.86%) and high stabilities, with the unencapsulated devices retaining about 95% of their original efficiencies after 1,000 h. The mechanistic basis for the passivation effect of the IL additives in the perovskite films is described.

源语言英语
文章编号100848
期刊Cell Reports Physical Science
3
4
DOI
出版状态已出版 - 20 4月 2022

指纹

探究 'Halide exchange in the passivation of perovskite solar cells with functionalized ionic liquids' 的科研主题。它们共同构成独一无二的指纹。

引用此