High photovoltaic performance of as-cast devices based on new quinoxaline-based donor-acceptor copolymers

	High photovoltaic performance of as-cast devices based on new quinoxaline-based donor-acceptor copolymers
	Zhao, Mingzhi 1; Qiao, Zi 1; Chen, Xiaofeng 1; Jiang, Chenglin 1; Li, Xiaoyu 2; Li, Yongfang 3; Wang, Haiqiao 1,2
刊名	POLYMER CHEMISTRY
	2017-10-07
卷号	8 期号:37 页码:5688-5697
英文摘要	Two new donor-acceptor copolymers, namely PBDT-DFQX-TTSEH and PBDT-DFQX-TTSC8, based on difluorinated quinoxaline (Qx) acceptor units and alkylthiothienyl benzo[1,2-b:4,5-b']dithiophene (BDT) donor units with different alkylthio side chains were designed and synthesized. The two copolymers exhibit a lower-lying HOMO energy level and closer interchain packing than their analogues with alkyl side chains attributed to the more polarizable S atom inducing stronger intermolecular interactions. Of these two polymers, PBDT-DFQX-TTSC8 with linear alkylthio side chains shows closer molecular stacking with PC71BM than PBDT-DFQX-TTSEH with branched alkylthio side chains. As a result, the polymer solar cell based on the blend of PBDT-DFQX-TTSC8 and PC71BM exhibited a higher PCE of 8.51% than that based on PBDT-DFQX-TTSEH and PC71BM, which was only 7.02%. More importantly, both copolymers show higher photovoltaic performances in as-cast devices than in those treated by additive or thermal annealing because an appropriate bulk morphology was formed during the process of spin-casting due to the strong interchain interactions of the polymers, which eliminates the need for solvent additives or thermal annealing.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/41252]
专题	化学研究所_有机固体实验室
作者单位	1.Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composite, Beijing 100029, Peoples R China 2.Beijing Univ Chem Technol, Minist Educ, Key Lab Carbon Fiber & Funct Polymers, Beijing 100029, Peoples R China 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	Zhao, Mingzhi,Qiao, Zi,Chen, Xiaofeng,et al. High photovoltaic performance of as-cast devices based on new quinoxaline-based donor-acceptor copolymers[J]. POLYMER CHEMISTRY,2017,8(37):5688-5697.
APA	Zhao, Mingzhi.,Qiao, Zi.,Chen, Xiaofeng.,Jiang, Chenglin.,Li, Xiaoyu.,...&Wang, Haiqiao.(2017).High photovoltaic performance of as-cast devices based on new quinoxaline-based donor-acceptor copolymers.POLYMER CHEMISTRY,8(37),5688-5697.
MLA	Zhao, Mingzhi,et al."High photovoltaic performance of as-cast devices based on new quinoxaline-based donor-acceptor copolymers".POLYMER CHEMISTRY 8.37(2017):5688-5697.