Effect of the pi-conjugation length on the properties and photovoltaic performance of A-pi-D-pi-A type oligothiophenes with a 4,8-bis(thienyl)benzo[1,2-b:4,5-b ']dithiophene core

CORC > 苏州纳米技术与纳米仿生研究所 > 中国科学院苏州纳米技术与纳米仿生研究所 > 印刷电子学部 > 马昌期团队

	Effect of the pi-conjugation length on the properties and photovoltaic performance of A-pi-D-pi-A type oligothiophenes with a 4,8-bis(thienyl)benzo[1,2-b:4,5-b ']dithiophene core
	Yin, N; Wang, LL(王立磊); Lin, Y; Yi, JD(伊金垛); Yan, LP(闫翎鹏); Dou, JY(窦军彦); Yang, HB; Zhao, X; Ma, CQ(马昌期)
刊名	BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
	2016
卷号	12
通讯作者	Ma, CQ(马昌期) ; Zhao, X
英文摘要	Benzo[1,2-b: 4,5-b']dithiophene (BDT) is an excellent building block for constructing p-conjugated molecules for the use in organic solar cells. In this paper, four 4,8-bis(5-alkyl-2-thienyl)benzo[1,2-b: 4,5-b']dithiophene (TBDT)-containing A-pi-D-pi-A-type small molecules (COOP-nHT-TBDT, n = 1, 2, 3, 4), having 2-cyano-3-octyloxy-3-oxo-1-propenyl (COOP) as terminal group and regioregular oligo(3-hexylthiophene) (nHT) as the pi-conjugated bridge unit were synthesized. The optical and electrochemical properties of these compounds were systematically investigated. All these four compounds displayed broad absorption bands over 350-600 nm. The optical band gap becomes narrower (from 1.94 to 1.82 eV) and the HOMO energy levels increased (from -5.68 to -5.34 eV) with the increase of the length of the p-conjugated bridge. Organic solar cells using the synthesized compounds as the electron donor and PC61BM as the electron acceptor were fabricated and tested. Results showed that compounds with longer oligothiophene pi-bridges have better power conversion efficiency and higher device stability. The device based on the quaterthiophene-bridged compound 4 gave a highest power conversion efficiency of 5.62% with a V-OC of 0.93 V, J(SC) of 9.60 mA.cm(-2), and a FF of 0.63.
关键词[WOS]	ORGANIC SOLAR-CELLS ; SMALL MOLECULES ; BENZODITHIOPHENE UNIT ; DONOR MOLECULES ; HIGH-EFFICIENCY ; END-GROUPS ; ACCEPTOR
收录类别	SCI
语种	英语
WOS记录号	WOS:000381260400001
内容类型	期刊论文
源URL	[http://ir.sinano.ac.cn/handle/332007/4578]
专题	苏州纳米技术与纳米仿生研究所_印刷电子学部_马昌期团队
推荐引用方式 GB/T 7714	Yin, N,Wang, LL,Lin, Y,et al. Effect of the pi-conjugation length on the properties and photovoltaic performance of A-pi-D-pi-A type oligothiophenes with a 4,8-bis(thienyl)benzo[1,2-b:4,5-b ']dithiophene core[J]. BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY,2016,12.
APA	Yin, N.,Wang, LL.,Lin, Y.,Yi, JD.,Yan, LP.,...&Ma, CQ.(2016).Effect of the pi-conjugation length on the properties and photovoltaic performance of A-pi-D-pi-A type oligothiophenes with a 4,8-bis(thienyl)benzo[1,2-b:4,5-b ']dithiophene core.BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY,12.
MLA	Yin, N,et al."Effect of the pi-conjugation length on the properties and photovoltaic performance of A-pi-D-pi-A type oligothiophenes with a 4,8-bis(thienyl)benzo[1,2-b:4,5-b ']dithiophene core".BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY 12(2016).