Copolymers from benzodithiophene and benzotriazole: synthesis and photovoltaic applications

doi:10.1039/c0py00136h

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	Copolymers from benzodithiophene and benzotriazole: synthesis and photovoltaic applications
	Zhang, Zhenhua 1; Peng, Bo 1,2; Liu, Bo 1; Pan, Chunyue 1; Li, Yongfang 2; He, Yuehui 3; Zhou, Kechao 3; Zou, Yingping 1
刊名	POLYMER CHEMISTRY
	2010
卷号	1 期号:9 页码:1441-1447
ISSN号	1759-9954
DOI	10.1039/c0py00136h
英文摘要	Two new alternating low bandgap copolymers from benzodithiophene and benzotriazole units, namely poly{4,8-bis(2-ethylhexyloxy)benzo[1,2-b; 3,4-b]dithiophene-2,6-diyl-alt-2-octyl-4,7-di(thiophen-2-yl)-2H-benzo[d][1,2,3]triazole-5',5 ''-diyl} (PBDTDTBTz) and poly{4,8-bis(2-ethylhexyloxy)benzo[1,2-b;3,4-b]dithiophene-2,6-diyl-alt-2-dodecylbenzotriazole-4,7-diyl} (PBDTBTz), were designed and synthesized by a typical Stille coupling polymerization method. The copolymers were characterized by thermogravimetric analysis, UV-vis absorption and cyclic voltammetry. PBDTDTBTz and PBDTBTz possess moderate molecular weights and excellent thermal properties with a 5% weight loss temperatures (T-d) around 300 degrees C. They exhibited good optical absorption, with peaks at 527 nm and 562 nm in the film state, respectively. Photovoltaic properties of the copolymers blended with [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) or [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as electron acceptors, were investigated. The photovoltaic device with the PBDTDTBTz/PC71BM shows a power conversion efficiency of 1.7% with a short circuit current density of 4.5 mA cm(-2) and a good fill factor of 0.62, while PBDTBTz demonstrated a moderate power conversion efficiency of up to 1.4%, under the illumination of AM 1.5, 100 mW cm(-2) with a device structure of ITO/PEDOT: PSS/polymer: PC71BM (1 : 4)/Ca/Al. All the above information highlighted that this kind of the copolymers is promising for the application of polymer solar cells.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000283744000010
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/69227]
专题	中国科学院化学研究所
通讯作者	Zou, Yingping
作者单位	1.Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing, Peoples R China 3.Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhenhua,Peng, Bo,Liu, Bo,et al. Copolymers from benzodithiophene and benzotriazole: synthesis and photovoltaic applications[J]. POLYMER CHEMISTRY,2010,1(9):1441-1447.
APA	Zhang, Zhenhua.,Peng, Bo.,Liu, Bo.,Pan, Chunyue.,Li, Yongfang.,...&Zou, Yingping.(2010).Copolymers from benzodithiophene and benzotriazole: synthesis and photovoltaic applications.POLYMER CHEMISTRY,1(9),1441-1447.
MLA	Zhang, Zhenhua,et al."Copolymers from benzodithiophene and benzotriazole: synthesis and photovoltaic applications".POLYMER CHEMISTRY 1.9(2010):1441-1447.