New m-alkoxy-p-fluorophenyl difluoroquinoxaline based polymers in efficient fullerene solar cells with high fill factor

	New m-alkoxy-p-fluorophenyl difluoroquinoxaline based polymers in efficient fullerene solar cells with high fill factor
	Xu, Shutao 1; Feng, Liuliu 1; Yuan, Jun 1; Cimrova, Vera 2; Chen, Guohui 1; Zhang, Zhi-Guo 3; Li, Yongfang 3; Peng, Hongjian 1; Zou, Yingping 1
刊名	ORGANIC ELECTRONICS
	2017-11-01
卷号	50 页码:7-15
关键词	Quinoxaline D-a Copolymer Fullerene Solar Cells Solvent Additive High Fill Factor
英文摘要	Two new donor (D) -acceptor (A) copolymers, named m-O-p-F-DFQx-BDT (OFQx-T) and m-EH-p-FDFQx-BDT (EHFQx-T), which were based on meta-octyloxy-para-fluorophenyl and meta-ethylhexyloxypara-fluorophenyl difluoroquinoxaline as acceptor units (O-DFQx/EH-DFQx) and alkylthienyl substituted benzodithiophene (BDT) as a donor unit, were designed and synthesized. EHFQx-T had higher absorption coefficient than OFQx-T which contributed to larger short-circuit current density (J(sc)). EHFQx-T showed a lower the highest occupied molecular orbital (HOMO) which is beneficial for the voltage open-circuit (V-oc). The polymer solar cells (PSCs) based OFQx-T: PC71BM and EHFQx-T: PC71BM blended film as active layer showed high power conversion efficiency (PCE) of 7.60% and 8.44%, respectively, with 1,8diiodooctane (DIO) solvent additive treatment. More importantly, OFQx-T: PC71BM and EHFQxT: PC71BM had good fill factor (FF), especially the FF of OFQx-T: PC71BM was over 70%. The high FF contributed to obtain high PCEs for OFQx-T and EHFQx-T. The more balanced and higher charge mobility, smaller geminate recombination and suitable nanoscale phase separation size of EHFQx-T demonstrate that changing octyl chain to ethylhexyl chain in DFQx acceptor unit is efficient to improve photovoltaic properties in fullerene solar cells. (C) 2017 Elsevier B. V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/41093]
专题	化学研究所_有机固体实验室
作者单位	1.Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China 2.Acad Sci Czech Republ, Inst Macromol Chem, Heyrovsky Sq 2, CR-16206 Prague 6, Czech Republic 3.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Xu, Shutao,Feng, Liuliu,Yuan, Jun,et al. New m-alkoxy-p-fluorophenyl difluoroquinoxaline based polymers in efficient fullerene solar cells with high fill factor[J]. ORGANIC ELECTRONICS,2017,50:7-15.
APA	Xu, Shutao.,Feng, Liuliu.,Yuan, Jun.,Cimrova, Vera.,Chen, Guohui.,...&Zou, Yingping.(2017).New m-alkoxy-p-fluorophenyl difluoroquinoxaline based polymers in efficient fullerene solar cells with high fill factor.ORGANIC ELECTRONICS,50,7-15.
MLA	Xu, Shutao,et al."New m-alkoxy-p-fluorophenyl difluoroquinoxaline based polymers in efficient fullerene solar cells with high fill factor".ORGANIC ELECTRONICS 50(2017):7-15.