Stretchable All-Small-Molecule Organic Solar Cells Enabled by Polymer Elastomer Confinement  

作　　者：Chen-Yi Zhang Yu-Qiang Liu Hong-Xiang Li Xin-Yue Cui Zheng-Dong Wei Yue-Heng Liu Ming-Hua Li An-Dong Zhang Pei Cheng Zhi-Shan Bo 

机构地区：[1]College of Textiles&Clothing,State Key Laboratory of Bio-fibers and Eco-textiles,Qingdao University,Qingdao,266071,China [2]State Key Laboratory of Polymer Materials Engineering,College of Polymer Science and Engineering,Sichuan University,Chengdu,610065,China [3]College of Materials Science and Engineering,Qingdao University,Qingdao,266071,China [4]Beijing Key Laboratory of Energy Conversion and Storage Materials,College of Chemistry,Beijing Normal University,Beijing,100875,China

出　　处：《Chinese Journal of Polymer Science》2025年第2期271-277,共7页高分子科学(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52303239 and 51933001);Natural Science Foundation of Shandong Province(Nos.ZR2022QB141 and 2023HWYQ-087).

摘　　要：Intrinsic stretchability is a promising attribute of polymer organic solar cells(OSCs).However,rigid molecular blocks typically exhibit poor tensile properties,rendering polymers vulnerable to mechanical stress.In this study,we introduce a different approach utilizing all-small-molecule donors and acceptors to fabricate stretchable OSCs.An elastomer,styrene-b-ethylene-butylene-styrene(SEBS),was embedded to modulate film crystallization and stretchability.SEBS effectively confines the growth process of donors and acceptors,leading to enhancement of the crystallization quality,thus contributing to enhanced device efficiencies.Meanwhile,SEBS can absorb and release mechanical stress during stretching,thereby preventing mechanical degradation of donors and acceptors.The mechanical properties of the OSCs were significantly improved by the incorporation of SEBS.Notably,the crack-onset strain increased from 1.03% to 5.99% with SEBS embedding.These findings present a straightforward strategy for achieving stretchable OSCs using all small molecules,offering a different perspective for realizing stretchable devices.

关 键 词：All-small-molecule Organic solar cells ELASTOMER Stretchability FLEXIBILITY 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]