Dihydropyreno[1,2-b:6,7-b '] dithiophene based electron acceptors for high efficiency as-cast organic solar cells

doi:10.1039/c9ta00614a

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	Dihydropyreno[1,2-b:6,7-b '] dithiophene based electron acceptors for high efficiency as-cast organic solar cells
	Jiang, Pengcheng 1; Lu, Hao 2; Jia, Qing-Qing 3; Feng, Shiyu 1; Li, Cuihong 1; Li, Hai-Bei 3; Bo, Zhishan 1
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2019-03-21
卷号	7 期号:11 页码:5943-5948
ISSN号	2050-7488
DOI	10.1039/c9ta00614a
英文摘要	Two novel fused ring electron acceptors PDT and PDT-T have been designed, synthesized and used in organic solar cells. PDT comprises a central 4,10-bis(hexyloxy)-6,6,12,12-tetrakis(4-hexylphenyl)-6,12-dihydropyreno[1,2-b:6,7-b']dithiophene (DDT) donor unit and two flanked 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile acceptor units, while PDT-T has an extra thiophene bridge unit between the central donor unit and the acceptor unit. The introduction of a thiophene bridge unit can markedly broaden the absorption of acceptors and enhance the film absorption coefficient. The optical bandgaps of PDT and PDT-T are 1.59 and 1.44 eV, respectively. The photovoltaic performance of these two acceptors was investigated using PBDB-T as the electron donor. Wide photo-current responses extending to 800 nm for PDT based devices and to 900 nm for PDT-T based ones were observed. A power conversion efficiency (PCE) of 7.07% for PBDB-T:PDT based cells was obtained with a V-oc of 0.96 V, J(sc) of 13.48 mA cm(-2) and FF of 54.0%, while the as-cast devices based on PBDB-T:PDT-T gave rise to a PCE of 11.02% with a V-oc of 0.88 V, J(sc) of 18.88 mA cm(-2) and FF of 66.3%. These results highlight that DDT is a promising building block for constructing highly efficient fused ring acceptors and pi-bridging can further boost the photovoltaic performance of the devices.
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000463970400006
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32029]
专题	兰州理工大学材料科学与工程学院
作者单位	1.Beijing Normal Univ, Coll Chem, Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China; 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China; 3.Shandong Univ, Sch Ocean, Weihai 264209, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Pengcheng,Lu, Hao,Jia, Qing-Qing,et al. Dihydropyreno[1,2-b:6,7-b '] dithiophene based electron acceptors for high efficiency as-cast organic solar cells[J]. JOURNAL OF MATERIALS CHEMISTRY A,2019,7(11):5943-5948.
APA	Jiang, Pengcheng.,Lu, Hao.,Jia, Qing-Qing.,Feng, Shiyu.,Li, Cuihong.,...&Bo, Zhishan.(2019).Dihydropyreno[1,2-b:6,7-b '] dithiophene based electron acceptors for high efficiency as-cast organic solar cells.JOURNAL OF MATERIALS CHEMISTRY A,7(11),5943-5948.
MLA	Jiang, Pengcheng,et al."Dihydropyreno[1,2-b:6,7-b '] dithiophene based electron acceptors for high efficiency as-cast organic solar cells".JOURNAL OF MATERIALS CHEMISTRY A 7.11(2019):5943-5948.