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Planarized Polymer Acceptor Featuring High Electron Mobility for Efficient All-Polymer solar cells

Chinese Journal of Polymer Science 2022年第8期40卷 968-978,I0011页

作者： Feng Liu Ri Sun Cheng-Yu Wang Liang Zhou Wen-Li Su Qi-Hui Yue Shuai Sun Wu-Yue Liu Hai-Jun Fan Wen-Kai Zhang Yun-Long Guo Li-Heng Feng Xiao-Zhang Zhu School of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan030006China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190China Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum StudiesBeijing Normal UniversityBeijing100875China University of Chinese Academy of Sciences Beijing100049China

Significant progress has been achieved for all-polymer solar cells(APSCs)in the last few years by the use of polymerized small molecular acceptors(PSMAs).Developing high electron mobility polymer acceptors has been considered a feasible solution to further improve the photovoltaic performance of APSCs and fabricate thick film devices,which contributed to roll-to-roll printing *** this work,we designed and synthesized PSV,an A-DA’D-A small molecule acceptor-based PSMA with the vinyl group as a bridged linkage to reduce the steric hindrance between the 1,1-dicyanomethylene-3-indanone(IC)terminal *** comparison with the C-C bond linked polymer acceptor PS,PSV exhibits an almost planar conjugated framework and well-ordered molecular stacking in the thin ***,PSV exhibits superior n-type semiconducting properties with high electron mobility of up to 0.54 cm^(2)·V^(−1)·s^(−1),which is the highest value among reported *** utilizing PM6 as a polymer donor,PSV-based blend forms a favorable nanomorphology and exhibits high and well-balanced hole/electron mobilities,which is beneficial for exciton separation and charge ***,APSCs based on PM6:PSV achieved high power conversion efficiencies of up to 15.73%,with a simultaneously realized high Voc of 0.923 V,Jsc of 23.2 mA·cm^(-2),and FF of *** superior features enable PSV with excellent thickness-insensitive properties and over 13%PCE was obtained at 300 *** the best of our knowledge,the high PCE of 15.73%with excellent electron mobility of 0.54 cm^(2)·V^(−1)·s^(−1)is the highest values reported for *** results point to the great significance of developing polymer acceptors with a high electron mobility for boosting the performance of APSCs.

关键词： All-polymer solar cells Polymerized small molecular acceptors Planarization Electron mobility thick film organic solar cells

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