溶剂调控策略用于钙钛矿太阳能电池的空气环境制备  

Solvent Regulation Strategy for Ambient Preparation of Perovskite Solar Cells

作　　者：程俊杰 王进 毕伟辉 陈凤凤 钟宇飞 CHENG Junjie;WANG Jin;BI Weihui;CHEN Fengfeng;ZHONG Yufei(School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;Zhejiang Engineering Research Center for Fabrication and Application of Advanced Photovoltaic Materials,School of Materials Science and Engineering,Ningbo Tech University,Ningbo 315100,China;Zhejiang Engineering Research Center for Fabrication and Application of Advanced Photovoltaic Materials,Institute for Carbon Neutrality,Ningbo Innovation Centre,Zhejiang University,Ningbo 315048,China)

机构地区：[1]浙江理工大学材料科学与工程学院,浙江杭州310018 [2]浙大宁波理工学院材料科学与工程学院,先进光伏材料制备与应用浙江省工程技术研究中心,浙江宁波315100 [3]浙江大学宁波科创中心双碳研究院,先进光伏材料制备与应用浙江省工程技术研究中心,浙江宁波315048

出　　处：《发光学报》2024年第12期2030-2036,共7页Chinese Journal of Luminescence

基　　金：宁波市自然科学基金(2022J149);浙江省自然科学基金(LY22E020010,LTGS24B030002);宁波市科技计划项目(2022-DST-004,2022A-230-G,2024Z242)。

摘　　要：通过哈克尔理论计算阐明溶剂N-乙基-2-吡咯烷酮(NEP)中羰基氧比N-甲基吡咯烷酮(NMP)具有更强的电负性,预测了其与PbI2更强的相互作用,以NEP代替溶剂中的NMP有效地提高了钙钛矿薄膜的结晶质量。利用溶剂调控辅助结晶策略经刮涂制备的FAPbI3钙钛矿太阳能电池的最高光电转化效率(PCE)从20.25%提高到了21.05%,平均效率从18.43%提升到了19.50%,在相对湿度为10%~20%和室温环境条件下,未封装器件在1200 h后仍能保持初始效率的82.1%。此外,该策略在双阳离子组分(FA0.95Cs0.05PbI3)钙钛矿前驱体溶液体系中同样适用,表现出了一定的普适性,有助于空气环境中钙钛矿太阳能电池的制备研究。This work shows that the carbonyl oxygen in the solvent N-ethyl-2-pyrrolidone(NEP)has a stronger elec-tronegativity than N-methyl-2-pyrrolidone(NMP)by extended huckel theoretical calculations,and predicts a stronger interaction between NEP and PbI2.The study employs a solvent-regulation-assisted crystallization strategy to effec-tively suppress the formation of solvent-perovskite complex intermediates,improving the crystallization quality of the perovskite films.The highest power conversion efficiency(PCE)of FAPbI3 perovskite solar cells fabricated in atmo-sphere increased from 20.25%to 21.05%,and the average efficiency improved from 18.43%to 19.50%.The sta-bility of unencapsulated devices was maintained at 82.1%of their initial efficiency after 1200 h under 10%-20%RH at room temperature.Moreover,this strategy is applicable to other perovskite chemical compositions(FA0.95Cs0.05PbI3)for perovskite precursor solutions,demonstrating the universality of which.This research would contribute to the research on the ambient preparation of perovskite solar cells.

关 键 词：钙钛矿太阳能电池 空气环境器件印刷 结晶调控 

分 类 号：TM914.4[电气工程—电力电子与电力传动]