Effect of substitution position on photoelectronic properties of indolo[3,2-b] carbazole-based metal-free organic dyes

doi:10.1016/j.solener.2018.08.029

	Effect of substitution position on photoelectronic properties of indolo[3,2-b] carbazole-based metal-free organic dyes
	Feng, Jiwen 2; Cheng, Xudong 1; Wang, Huijuan 2; Di, Yi 2; Chen, Bing 2; Xiao, Zhanhai 1,2
刊名	SOLAR ENERGY
	2018-10-01
卷号	173 页码:825-833
关键词	Dye sensitized solar cells DFT calculations D-D-pi-A Co-sensitization
ISSN号	0038-092X
DOI	10.1016/j.solener.2018.08.029
英文摘要	Two new indolo[3,2-b]carbazole-based metal-free organic dyes (Dl and D2) were synthesized by utilizing triphenylamine as the first donor which were connected to the second donor indolo[3,2-b]carbazole via 9-position and 8-position, respectively. The dyes were characterized by UV-visible absorption spectra and electrochemical analyses. The both two dyes showed intensive absorption spectra in the wavelength of 300-600 nm and narrow band gap of 2.29 eV for Dl and 2.16 eV for D2. The cyclic voltanunetry indicated that the oxidative potentials and reductive potentials of the dyes were well matched with the energy levels of the I-/I-3(-) redox couple and TiO2 conduction band, respectively. The substituted positions on the indolo[3,2-b]carbazole played important roles in tuning the photoelectronic properties. The dye D2 with 2, 8-substituted indolo[3,2-b]carbazole core shows wider absorption spectrum and lower dye aggregation than D1 with 3,9-substituted isomer. The best power conversion efficiency (PCE) of 6.34% is obtained by the dye D2 due to its wider absorption spectra and strong steric hindrance, which can effectively suppress the undesirable dye aggregation. The co-sensitization of Dl and D2 enhances IPCE response in the visible light region and further improves the PCE up to 7.03%.
资助项目	National Natural Science Foundation of China[21303256] ; National Natural Science Foundation of China[11274347]
WOS关键词	D-PI-A ; SENSITIZED SOLAR-CELLS ; CONVERSION EFFICIENCY ; TRIPHENYLAMINE ; BENZOTRIAZOLE ; ACCEPTOR ; DONOR ; UNITS ; FILM
WOS研究方向	Energy & Fuels
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000452940800080
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/13420]
专题	中国科学院武汉物理与数学研究所
通讯作者	Feng, Jiwen; Cheng, Xudong; Chen, Bing
作者单位	1.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Feng, Jiwen,Cheng, Xudong,Wang, Huijuan,et al. Effect of substitution position on photoelectronic properties of indolo[3,2-b] carbazole-based metal-free organic dyes[J]. SOLAR ENERGY,2018,173:825-833.
APA	Feng, Jiwen,Cheng, Xudong,Wang, Huijuan,Di, Yi,Chen, Bing,&Xiao, Zhanhai.(2018).Effect of substitution position on photoelectronic properties of indolo[3,2-b] carbazole-based metal-free organic dyes.SOLAR ENERGY,173,825-833.
MLA	Feng, Jiwen,et al."Effect of substitution position on photoelectronic properties of indolo[3,2-b] carbazole-based metal-free organic dyes".SOLAR ENERGY 173(2018):825-833.