Bending-stability Interfacial Layer as Dual Electron Transport Layer for Flexible Organic Photovoltaics

作     者：Guodong Xu Xiaotian Hu Xunfan Liao Yiwang Chen Guodong Xu;Xiaotian Hu;Xunfan Liao;Yiwang Chen

作者机构：Institute of Advanced Scientific Research(iASR)Jiangxi Normal UniversityNanchang 330022China Key Laboratory of Functional Small Molecules for Ministry of EducationJiangxi Normal UniversityNanchang 330022China Analysis and Testing CenterJiangxi Normal UniversityNanchang 330022China Institute of Polymers and Energy Chemistry(IPEC)Nanchang UniversityNanchang 330031China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2021年第39卷第11期

页      面：1441-1448页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financial support from the National Natural Science Foundation of China(Nos.51833004 22005131 51973032 21905043 and U20A20128) 

主　　题：Bending-stability of interfacial layer Conjugated electrolytes Fully-flexible OPVs Electron transport layers 

摘      要：The flexibility of organic photovoltaics(OPVs)has attracted worldwide attention in recent *** realize the bending-stability of OPVs,it is necessary to put forward the bending-stability of interfacial layer.A novel bendable composite is explored and successfully applied as an electron transport layer(ETL)for fully-flexible *** incorporated poly(vinylpyrrolidone)(PVP)into conjugated electrolytes(CPE)to composite a bendable ETL for high-performance OPVs ***,the devices based on PVP-modified CPE exhibited better device performances and more excellent mechanical properties of *** fullerene-free OPVs based on PM6:IT-4 F with CPE@PVP as ETLs yield the best power conversion efficiency(PCE)of 13.42%.Moreover,a satisfying efficiency of 12.59%has been obtained for the fully-flexible *** far as we know,this is one of the highest PCE for fully-flexible OPV based PM6:IT-4 F *** importantly,the flexible OPVs devices can retain more than 80%of its initial efficiency after 5000 bending ***,among various curvature radii,the mechanical properties of the device based on CPE@PVP are superior to those of the device based on bare CPE as *** findings indicate that the functional flexibility of CPE as a cathode interfacial layer is an effective strategy to fabricate high-performance flexible devices in the near future.