Side Chain Selection for Designing Highly Efficient Photovoltaic Polymers with 2D-Conjugated Structure

doi:10.1021/ma500829r

CORC > 化学研究所 > 中国科学院化学研究所

	Side Chain Selection for Designing Highly Efficient Photovoltaic Polymers with 2D-Conjugated Structure
	Zhang, Shaoqing 1,2; Ye, Long 2; Zhao, Wenchao 2; Liu, Delong 2; Yao, Huifeng 2; Hou, Jianhui 1,2
刊名	MACROMOLECULES
	2014-07-22
卷号	47 期号:14 页码:4653-4659
ISSN号	0024-9297
DOI	10.1021/ma500829r
英文摘要	Recently, the benzodithiophene- (BDT-) based polymers with conjugated side groups attracted considerable attention due to their superior properties in polymer solar cells (PSCs), so the investigation of the side chain effects on the photovoltaic properties of this type of polymers is an interesting and important topic for molecular design. Herein, three conjugated polymers based on BDT and thieno[3,4-b]thiophene units with furan, thiophene and selenophene as side groups, named as PBDTTT-EFF, PBDTTT-EFT, and PBDTTT-EFS, were synthesized and applied in polymer solar cells. The polymers were characterized in parallel by absorption spectroscopy, thermogravimetric analysis (TGA), density functional theory (DFT), ultraviolet photoemission spectroscopy (UPS), X-ray diffraction (XRD), and photovoltaic measurements. The results show that the dihedral angles between the BDT and conjugated side groups play important roles in affecting the absorption bands, HOMO levels, crystallinities, and aggregation sizes of the polymers. The photovoltaic results indicate that PBDTTT-EFT and PBDTTT-EFS show similar photovoltaic characteristics in device, and PCEs of 9.0% and 8.78% were obtained, respectively. The device of PBDTTT-EFF shows a V-oc of 0.69 V and a J(sc) of 11.77 mA/cm(2), which are lower than those in the devices based on the other two polymers. Overall, this work suggests that the photovoltaic properties of the BDT-based polymers can be effectively tuned by introducing conjugated side groups with varied steric hindrance.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000339462900013
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/51693]
专题	中国科学院化学研究所
通讯作者	Hou, Jianhui
作者单位	1.Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shaoqing,Ye, Long,Zhao, Wenchao,et al. Side Chain Selection for Designing Highly Efficient Photovoltaic Polymers with 2D-Conjugated Structure[J]. MACROMOLECULES,2014,47(14):4653-4659.
APA	Zhang, Shaoqing,Ye, Long,Zhao, Wenchao,Liu, Delong,Yao, Huifeng,&Hou, Jianhui.(2014).Side Chain Selection for Designing Highly Efficient Photovoltaic Polymers with 2D-Conjugated Structure.MACROMOLECULES,47(14),4653-4659.
MLA	Zhang, Shaoqing,et al."Side Chain Selection for Designing Highly Efficient Photovoltaic Polymers with 2D-Conjugated Structure".MACROMOLECULES 47.14(2014):4653-4659.