Synergistic effect of multifunctional MXene-nanosheet and naphthoquinone sulfonate toward high-performance perovskite solar cells and modules

钙钛矿(结构) 纳米片 材料科学 钝化 能量转换效率 结晶度 化学工程 密度泛函理论 氧化物 纳米技术 化学 光电子学 计算化学 图层(电子) 复合材料 冶金 工程类
作者
Shuguang Cao,Lavrenty G. Gutsev,Zhuoneng Bi,Yupeng Zheng,Xueqing Xu,Yanqing Zhu,Liuwen Zhong,Jieyuan Zheng,Gang Xu,Pavel A. Troshin,Shengzhong Liu,Kai Wang,Karl Cedric Gonzales,Antonio Guerrero,Zhiwei Ren,Gang Li
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:474: 145707-145707 被引量:9
标识
DOI:10.1016/j.cej.2023.145707
摘要

Interface defect passivation strategies play a vital role in the design of efficient, and stable perovskite solar cells (PSCs). Presently, we combine MXene-nanosheets with a 1,2-naphthoquinone-4-sulfonic acid sodium salt (NQSNa) which function as novel and multifunctional passivators to modify and enhance the performance of the pre-buried tin oxide (SnO2)/perovskite interface for n-i-p PSCs. It was observed that the surface terminals of the MXene nanosheets effectively interact with the undercoordinated Sn and the terminal-hydroxyl (OHT) groups while also passivating the oxygen vacancies in the SnO2 film. Moreover, although the two naphthoquinone groups in NQSNa are electron-withdrawing groups, they are more prone to keto-enol tautomerism resulting in a stronger electron-donating character compared to the –NH2 group in sodium 4-amino-1-naphthalenesulfonate (NASNa). Therefore, naphthoquinone groups of NQSNa promote a stronger interaction between -SO3- and the uncoordinated Pb2+ than –NH2 of NASNa, which is concordance with our density functional theory (DFT) calculations. This surface coordination increases the crystallinity of the perovskite films, thus resulting in a lower rate of carrier recombination and promoting efficient carrier extraction and transport. The device achieves a champion device efficiency of 24.01% (0.082 cm2) and the efficiency of corresponding minimodule reaches 20.11% (3 × 0.523 cm2). Furthermore, an unencapsulated optimized device maintains 93.92% of its initial power conversion efficiency after stored in a dry box for 1440 h and exhibits excellent thermal stability at 85 °C. This work presents an effective method to improve the quality of the pivotal SnO2/perovskite interface further advancing the future development of high-performance PSCs and modules.
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