Investigations of the Conjugated Polymers Based on Dithienogermole (DTG) Units for Photovoltaic Applications

doi:10.1021/ma500831z

CORC > 化学研究所 > 中国科学院化学研究所

	Investigations of the Conjugated Polymers Based on Dithienogermole (DTG) Units for Photovoltaic Applications
	Wang, Qi 1,2; Zhang, Shaoqing 1,2; Ye, Long 2; Cui, Yong 1,2; Fan, Huili 1; Hou, Jianhui 1,2
刊名	MACROMOLECULES
	2014-08-26
卷号	47 期号:16 页码:5558-5565
ISSN号	0024-9297
DOI	10.1021/ma500831z
英文摘要	Conjugated polymers based on the dithienogermole (DTG) units showed promising properties for the applications in polymer solar cells (PSCs), so that the investigations of the natures and photovoltaic properties of the DTG-based polymers with varied backbone structures would be of great interest. In this work, four DTG-based polymers named as PDTG-BDD, PDTG-IID, PDTG-BT, and PDTG-DPP were synthesized and characterized. The results indicate that the DTG-based polymers show varied absorption bands and molecular energy levels. In X-ray diffraction measurements, these polymers show different laminar packing and pi-pi stacking distances in solid films. The PSC devices based on the four DTG-based polymers were fabricated, and their photovoltaic properties were characterized. The results show that different device fabrication conditions are needed to get optimal photovoltaic performance of these four polymers. The device of PDTG-BDD shows a PCE of 6.3% with a high V-oc 0.935 V, a FF of 65.0%, and a J(sc) of 10.3 mA/cm(2), which is the highest one in these four polymers; the devices of PDTG-DPP showed a miserably low J(sc) of 3.19 mA/cm(2) due to the unfavorable morphologies of the polymer:PC71BM blend. Overall, the comparisons among these four polymers provide fundamental information for understanding the correlations among molecular structures and photovoltaic properties of the DTG-based polymers, and how to control or modulate the bandgaps, molecular energy levels, and morphologies of the DTG-polymers will be the key to fully explore their potentials as photovoltaic materials.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000340992700014
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/53237]
专题	中国科学院化学研究所
通讯作者	Fan, Huili
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	Wang, Qi,Zhang, Shaoqing,Ye, Long,et al. Investigations of the Conjugated Polymers Based on Dithienogermole (DTG) Units for Photovoltaic Applications[J]. MACROMOLECULES,2014,47(16):5558-5565.
APA	Wang, Qi,Zhang, Shaoqing,Ye, Long,Cui, Yong,Fan, Huili,&Hou, Jianhui.(2014).Investigations of the Conjugated Polymers Based on Dithienogermole (DTG) Units for Photovoltaic Applications.MACROMOLECULES,47(16),5558-5565.
MLA	Wang, Qi,et al."Investigations of the Conjugated Polymers Based on Dithienogermole (DTG) Units for Photovoltaic Applications".MACROMOLECULES 47.16(2014):5558-5565.