维普中文期刊产品整合服务

Enhanced intermolecular interactions to improve twisted polymer photovoltaic performance

查看全文 作　　者：Cunbin [1]An;Jingming [2]Xin;Lanlan [1]Shi;Wei [2]Ma;Jianqi [3]Zhang;Huifeng [1]Yao;Sunsun [1,4]Li;Jianhui [1,4]Hou 高影响力作者 机构地区：[1]Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences;[2]State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University;[3]Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology;[4]University of Chinese Academy of Sciences高影响力机构 出　　处：《Science China Chemistry》索引2019年第62卷第3期,共8页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China (51703228, 21835006, 21504066);the Chinese Academy of Sciences (XDB12030200), and the Ministry of Science and Technology (2016YFA0200700);supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 摘　　要：In polymer solar cells(PSCs), twisted polymer donors usually have low photovoltaic efficiencies due to their poor photoactive layer morphologies. Herein, we successfully improved twisted polymer(PBDT-3T) photovoltaic efficiency by employing C=O groups(PBDT-3TCO) to enhance intermolecular interactions. The maximum power conversion efficiency(PCE) of PBDT-3T is only 1.05%, while the PCE of PBDT-3TCO reaches 11.77% in non-fullerene(NF) PSCs. Both polymers-based PSCs show very similar open-circuit voltages but remarkable differences in their short-circuit currents and fill factors. The single crystals of both functionalized terthiophenes with methyl substituents demonstrate that the terthiophene with C=O units changes molecular pattern by forming intra/inter molecular S???O and O???H interactions but its molecular planarity does not significantly improve.Our comparative studies show that PBDT-3TCO with C=O units possesses a strong aggregation property and optimal photoactive layer morphology in NF PSCs. This study provides important insight into the design of high-performance twisted polymer donors for NF PSCs. 关 键 词：TWISTED POLYMER DONORS CARBONYL group INTERMOLECULAR interaction POLYMER SOLAR cells
相关文献

参考文献(50)

引证文献(2)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费