Metal-free photosensitizers based on benzodithienothiophene as pi-conjugated spacer for dye-sensitized solar cells

CORC > 化学研究所 > 中国科学院化学研究所 > 其它

	Metal-free photosensitizers based on benzodithienothiophene as pi-conjugated spacer for dye-sensitized solar cells
	Zhang, Kai 1,2,4; Zhang, Weifeng 5; Huang, Jianyao 5; Pang, Aiying 3; Wong, Man Shing 1,2
刊名	ORGANIC ELECTRONICS
	2017-03-01
卷号	42 页码:275-283
关键词	Organic Photosensitizers Benzodithienothiophene Pi-spacer Dssc
英文摘要	A novel series of metal-free organic photosensitizers based on D-pi-A or D-A(1)-pi-A structure motif namely, BD-n, (where n = 1-5) bearing a high hole-transporting benzodithienothiophene as the pi-bridge for the first time, carbazole or triarylamine as the electron-donor and benzothiadiazole or quinoxaline as the auxiliary electron-deficient unit was synthesized and investigated for DSSC applications. DSSCs based on these five photosensitizers were also fabricated which exhibited efficiencies ranging from 3.92% to 5.46%. Among these DSSCs, devices based on D-A(1)-pi-A type dye, BD-3 and bidenate dye, BD-5 as a photosensitizer afforded the best efficiencies of 5.34%-5.46%. Our results suggested that an incorporation of a proper auxiliary accepting group (A(1)) into the D-pi-A conjugation system to enhance light harvesting and charge transfer as well as the use of V-shaped di-anchdring strategy to suppress aggregation on the TiO2 surface were found to be useful and effective strategies to enhance the photovoltaic performance of a DSSC. These devices exhibited relatively long electron lifetimes suggesting the slow charge recombination kinetics and thus better DSSC performance. Our findings also suggest that benzodithienothiophene is a promising pi-bridge to construct organic photosensitizers for high efficiency DSSCs. (C) 2016 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38056]
专题	化学研究所_其它
作者单位	1.Hong Kong Baptist Univ, Dept Chem, Inst Mol Funct Mat, Kowloon Tong, Hong Kong, Peoples R China 2.Hong Kong Baptist Univ, Inst Adv Mat, Kowloon Tong, Hong Kong, Peoples R China 3.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China 4.Southwest Med Univ, Coll Preclin Med, Luzhou 646000, Sichuan, Peoples R China 5.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Kai,Zhang, Weifeng,Huang, Jianyao,et al. Metal-free photosensitizers based on benzodithienothiophene as pi-conjugated spacer for dye-sensitized solar cells[J]. ORGANIC ELECTRONICS,2017,42:275-283.
APA	Zhang, Kai,Zhang, Weifeng,Huang, Jianyao,Pang, Aiying,&Wong, Man Shing.(2017).Metal-free photosensitizers based on benzodithienothiophene as pi-conjugated spacer for dye-sensitized solar cells.ORGANIC ELECTRONICS,42,275-283.
MLA	Zhang, Kai,et al."Metal-free photosensitizers based on benzodithienothiophene as pi-conjugated spacer for dye-sensitized solar cells".ORGANIC ELECTRONICS 42(2017):275-283.