Chelation of lithium ion with crown ether for eliminating adverse effects caused by Li-TFSI/tBP doping system in Spiro-OMeTAD

作     者：Zhongquan Wan Hui Lu Jinyu Yang Yunpeng Zhang Fangyan Lin Jianxing Xia Xiaojun Yao Junsheng Luo Chunyang Jia Zhongquan Wan;Hui Lu;Jinyu Yang;Yunpeng Zhang;Fangyan Lin;Jianxing Xia;Xiaojun Yao;Junsheng Luo;Chunyang Jia

作者机构：State Key Laboratory of Electronic Thin Films and Integrated DevicesSchool of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110GuangdongChina State Key Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000GansuChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第11期

页      面：489-496,I0013页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China(22175029 and 62104031) the Sichuan Science and Technology Program(2019YJ0162) the Open Foundation of State Key Laboratory of Electronic Thin Films and Integrated Devices(KFJJ202109) the Natural Science Foundation of Shenzhen Innovation Committee(JCYJ20210324135614040) the Technical Field Funds of 173 Project(2021-JCJQ-JJ-0663) the Fundamental Research Funds for the Central Universities of China(ZYGX2021J010 and Y030202059018023)for financial support 

主　　题：Perovskite solar cells Spiro-OMeTAD Li-TFSI dopant 12-Crown-4 Chelation 

摘      要：Lithium bis(trifluoromethanesulfonyl)imide(Li-TFSI)/4-tert-butylpyridine(tBP)is a classic doping system for the hole transport material Spiro-OMeTAD in typical n-i-p structure perovskite solar cells(PSCs),but this system will cause many problems such as high hygroscopicity,Li+migration,pinholes and so on,which hinder PSC from maintaining high efficiency and stability for *** this work,an effective strategy is demonstrated to improve the performance and stability of PSC by replacing t BP with *** chelation of 12-crown-4 with Li+not only improves the doping effect of Li-TFSI,but also perfectly solves the problems caused by the Li-TFSI/tBP *** PSC based on this strategy achieved a champion power conversion efficiency(PCE)over 21%,which is significantly better than the pristine device(19.37%).More importantly,the without encapsulated device based on Li-TFSI/12-crown-4 still maintains 87%of the initial PCE even after 60 days exposure in air,while the pristine device only maintains 22%of the initial PCE under the same aging *** strategy paves a novel way for constructing efficient and stable PSCs.