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DOI	10.1039/c9ee01890e
	A monothiophene unit incorporating both fluoro and ester substitution enabling high-performance donor polymers for non-fullerene solar cells with 16.4% efficiency
	Sun H.; Liu T.; Yu J.; Lau T.-K.; Zhang G.; Zhang Y.; Su M.; Tang Y.; Ma R.; Liu B.; Liang J.; Feng K.; Lu X.; Guo X.; Gao F.; Yan H.
发表日期	2019
ISSN	1754-5692
起始页码	3328
结束页码	3337
卷号	12 期号:11
英文摘要	Thiophene and its derivatives have been extensively used in organic electronics, particularly in the field of polymer solar cells (PSCs). Significant research efforts have been dedicated to modifying thiophene-based units by attaching electron-donating or withdrawing groups to tune the energy levels of conjugated materials. Herein, we report the design and synthesis of a novel thiophene derivative, FE-T, featuring a monothiophene functionalized with both an electron-withdrawing fluorine atom (F) and an ester group (E). The FE-T unit possesses distinctive advantages of both F and E groups, the synergistic effects of which enable significant downshifting of the energy levels and enhanced aggregation/crystallinity of the resulting organic materials. Shown in this work are a series of polymers obtained by incorporating the FE-T unit into a PM6 polymer to fine-Tune the energetics and morphology of this high-performance PSC material. The optimal polymer in the series shows a downshifted HOMO and an improved morphology, leading to a high PCE of 16.4% with a small energy loss (0.53 eV) enabled by the reduced non-radiative energy loss (0.23 eV), which are among the best values reported for non-fullerene PSCs to date. This work shows that the FE-T unit is a promising building block to construct donor polymers for high-performance organic photovoltaic cells. This journal is © The Royal Society of Chemistry.
语种	英语
scopus关键词	Energy dissipation; Esters; Fullerenes; Morphology; Organic polymers; Photoelectrochemical cells; Photovoltaic cells; Thiophene; Conjugated materials; Electronwithdrawing; Nonradiative energy; Organic electronics; Organic photovoltaic cells; Polymer solar cell (PSCs); Synergistic effect; Thiophene derivatives; Polymer solar cells; energy efficiency; ester; fuel cell; organic compound; performance assessment; photovoltaic system; polymer; solar power
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162785
作者单位	Dept. of Mat. Sci. and Engineering and the Shenzhen Key Laboratory for Printed Organic Electronics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen Guangdong, 518055, China; Dept. of Chem. and Hong Kong Br. of Chinese Natl. Eng. Res. Ctr. for Tissue Restoration and Reconstr, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon Hong Kong, Hong Kong; Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SE 58183, Sweden; Department of Physics, Chinese University of Hong Kong, New Territories Hong Kong, Hong Kong; eFlexPV Limited Room 228, Shenzhen, China
推荐引用方式 GB/T 7714	Sun H.,Liu T.,Yu J.,et al. A monothiophene unit incorporating both fluoro and ester substitution enabling high-performance donor polymers for non-fullerene solar cells with 16.4% efficiency[J],2019,12(11).
APA	Sun H..,Liu T..,Yu J..,Lau T.-K..,Zhang G..,...&Yan H..(2019).A monothiophene unit incorporating both fluoro and ester substitution enabling high-performance donor polymers for non-fullerene solar cells with 16.4% efficiency.Energy and Environmental Science,12(11).
MLA	Sun H.,et al."A monothiophene unit incorporating both fluoro and ester substitution enabling high-performance donor polymers for non-fullerene solar cells with 16.4% efficiency".Energy and Environmental Science 12.11(2019).