Simultaneous Optimization of Efficiency,Stretchability,and Stability in All-Polymer Solar Cells via Aggregation Control
作者机构：School of Materials Science&EngineeringTianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin Universityand Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300350China Shanghai Synchrotron Radiation FacilityShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Beijing National Laboratory for Molecular SciencesState Key Laboratory of Polymer Physics and ChemistryCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China College of Materials Science and EngineeringNanjing Forestry UniversityNanjingJiangsu 210037China Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityBinhai New CityFuzhouFujian 350207China
出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)
年 卷 期：2023年第41卷第2期
页 面：159-166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：This research was made possible thanks to the financial support of the National Natural Science Foundation of China(Nos.52073207 and 52121002) the Fundamental Research Funds for the Central Universities.L.Ye also appreciates the Peiyang Scholar Program of Tianjin University for support
主 题：Organic photovoltaics Polymer acceptors Aggregation Stretchability Stability
摘 要：With the emergence of Y-series small molecule acceptors,polymerizing the small molecule acceptors with aromatic linker units has attracted significant research attention,which has greatly advanced the photovoltaic performance of all-polymer solar *** the rapid increase in efficiency,the unique characteristics(e.g.,mechanical stretchability and flexibility)of all-polymer systems were still not thoroughly *** this work,we demonstrate an effective approach to simultaneously improve device performance,stability,and mechanical robustness of all-polymer solar cells by properly suppressing the aggregation and crystallization behaviors of polymerized Y-series ***,when introducing 50 wt%PYF-IT(a fluorinated version of PY-IT)into the well-known PM6:PY-IT system,the all-polymer devices delivered an impressive photovoltaic efficiency of 16.6%,significantly higher than that of the control binary cell(15.0%).Compared with the two binary systems,the optimal ternary blend exhibits more efficient charge separation and balanced charge transport accompanying with less ***,a high-performance 1.0 cm^(2)large-area device of 15%efficiency was demonstrated for the optimized ternary all-polymer blend,which offered a desirable PCE of 14.5%on flexible substrates and improved mechanical flexibility after bending 1000 ***,these are among the best results for 1.0 cm^(2)all-polymer OPVs thus *** work also heralds a bright future of all-polymer systems for flexible wearable energy-harvesting applications.
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