Multi-scale mechanical properties of bulk-heterojunction films in polymer solar cells  

作　　者：Tian Zhong Feng Guo Shiyun Lei Biao Xiao Qingduan Li Tao Jia Xunchang Wang Renqiang Yang 

机构地区：[1]Key Laboratory of Optoelectronic Chemical Materials and Devices(Ministry of Education),Flexible Display Materials and Technology Co‒Innovation Centre of Hubei Province,School of Optoelectronic Materials&Technology,Jianghan University,Wuhan 430056,China [2]School of Chemistry,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage,Guangdong Provincial Engineering Technology Research Center for Materials for Energy Conversion and Storage,South China Normal University,Guangzhou 510006,China [3]School of Optoelectronic Engineering,Guangdong Polytechnic Normal University,Guangzhou 510665,China [4]State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,China

出　　处：《npj Flexible Electronics》2023年第1期545-554,共10页npj-柔性电子（英文）

基　　金：supported by the National Natural Science Foundation of China(52103213,52073122);University-Level Research Project Funding Program of Jianghan University(2022XKZX03);Ministry of Science and Technology of China(2021YFE0113600);Key R&D Project of Hubei Province(2022BAA095);Open Fund of State Key Laboratory of Luminescent Materials and Devices(2022-skllmd-04).

摘　　要：The mechanical properties of bulk-heterojunction(BHJ)films play critical roles in the operational stability of flexible polymer solar cells(PSCs).In this study,the multi-scale mechanical properties of the BHJ films containing three representative electron acceptors are systematically evaluated.Interestingly,the tensile moduli of the films based on PC_(71)BM,Y6,and PRi-C39 decrease sequentially,and their fracture strain and toughness show an increasing trend.Moreover,the nanoindentation moduli of the films based on these acceptors vary in accordance with the results of tensile characterizations.Creep analyses illustrate that the occurrence of creep deformation in the PC_(71)BM,Y6,and PRi-C39-based films decrease sequentially.Contact angle tests demonstrate that the donor-acceptor interactions greatly affect the mechanical properties of these films.All results above demonstrate the effects of acceptor type on the multi-scale mechanical properties of the BHJ films,which are important for the development of reliable flexible PSCs.

关 键 词：CREEP TOUGHNESS DEFORMATION 

分 类 号：TM914.4[电气工程—电力电子与电力传动]