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The structure-performance correlation of bulk-heterojunction organic solar cells with multi-length-scale morphology

查看全文 作　　者：Tianyu [1]Hao;Wenkai [1]Zhong;Shifeng [1]Leng;Rui [1]Zeng;Ming [1]Zhang;Lei [1]Zhu;Yankang [1]Yang;Jingnan [1]Song;Jinqiu [1]Xu;Guanqing [1]Zhou;Yecheng [2]Zou;Yongming [1,2]Zhang;Feng [1,2]Liu 高影响力作者 机构地区：[1]School of Chemistry and Chemical Engineering,Frontiers Science Center for Transformative Molecules,In-situ Center for Physical Science,Center of Hydrogen Science,Shanghai Key Lab of Electrical Insulation&Thermal Aging,Shanghai Jiao Tong University,Shanghai 200240,China;[2]State Key Laboratory of Fluorinated Functional Membrane Materials,Shandong Dongyue Future Hydrogen Energy Materials Company,Zibo 256401,China高影响力机构 出　　处：《Science China Chemistry》索引2022年第65卷第8期,共8页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(51973110,21734009,22109094,21905102);the Program of Shanghai Science and Technology Commission Science and Technology Innovation Action Plan(20ZR1426200,20511103800,20511103802,20511103803);the Natural Science Foundation of Shandong Province,China(ZR2019LFG005);Key Research Project of Shandong Province(2020CXGC010403)。 摘　　要：We build a general multi-length-scale morphology model with mixing phase and pure phase fibril structure,and simulate corresponding organic solar cells performance.Systematical multi-length-scale morphology optimization process by changing the proportion of mixing phase and pure phase in different period width cases shows a clear correlation between period width and device performance that a smaller period width with appropriate proportion of mixing phase and fibril structure is advantageous to achieve high-performance devices.Experiments on multiple donor/acceptor blends have been carried out by varying the composition and processing condition,which afford good structure-performance correlation that supports the model prediction.It is demonstrated that building such a multi-length-scale morphology merging the synergistic effects of mixing and pure phases is indeed an imperative avenue to improve device efficiency. 关 键 词：multi-length-scale morphology simulations organic photovoltaics morphology-performance relationship
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