Mesoscopic titania solar cells with the tris(1,10-phenanthroline)cobalt redox shuttle: uniped versus biped organic dyes

	Mesoscopic titania solar cells with the tris(1,10-phenanthroline)cobalt redox shuttle: uniped versus biped organic dyes
	Liu JY ; Zhang J ; Xu MF ; Zhou DF ; Jing XY ; Wang P
刊名	energy & environmental science
	2011
卷号	4 期号:8 页码:3021-3029
关键词	ELECTRON-TRANSFER HALOGEN BONDS RECOMBINATION TIO2 PERFORMANCE SENSITIZERS COMPLEXES MEDIATORS CHEMISTRY THIOPHENE
ISSN号	1754-5692
通讯作者	liu jy
中文摘要	the combination of some non-iodine one-electron outer-sphere redox shuttles with high-absorption-coefficient organic d-pi-a dyes has very recently brought forth a new opportunity towards efficiency enhancement of dye-sensitized solar cells (dscs). thereby a comprehensive understanding on the structure-property relationship of metal-free organic photosensitizers will play a pivotal role in further development of high-efficiency devices iodine-free. herein, we scrutinize some general influences of the cyanoacrylic-acid-anchoring-group number of organic dyes upon the optoelectronic features of mesoscopic titania solar cells based on the tris(1,10-phenanthroline)cobalt(ii/iii) redox shuttle, by employing three pairs of uniped and biped dyes with thiophene, 3,4-ethylenedioxythiophene and 4,4-dihexyl-4h-cyclopenta[2,1-b:3,4-b']dithiophene as the pi-conjugated spacers. it is found that regardless of the spacer selection, a biped dye confers an improved light absorption coefficient of a stained titania film in comparison with its uniped analogue, which is highly desirable for cells with a one-electron outer-sphere redox shuttle, because in this type of cells a very thin titania film is always needed to satisfy the mass transport and electron collection requirements. however, our electrical impedance analyses have revealed that the alteration from a uniped chromophore to its biped congener evokes not only a downward displacement of the titania conduction band edge but also an acceleration of interfacial charge recombination of the titania electrons with cobalt(iii) ions, leading to an attenuated open-circuit photovoltage, highlighting the future necessity to design a sterically bulky organic dye featuring superior light-harvesting capacity.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000293213600051
公开日期	2012-06-08
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/44443]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Liu JY,Zhang J,Xu MF,et al. Mesoscopic titania solar cells with the tris(1,10-phenanthroline)cobalt redox shuttle: uniped versus biped organic dyes[J]. energy & environmental science,2011,4(8):3021-3029.
APA	Liu JY,Zhang J,Xu MF,Zhou DF,Jing XY,&Wang P.(2011).Mesoscopic titania solar cells with the tris(1,10-phenanthroline)cobalt redox shuttle: uniped versus biped organic dyes.energy & environmental science,4(8),3021-3029.
MLA	Liu JY,et al."Mesoscopic titania solar cells with the tris(1,10-phenanthroline)cobalt redox shuttle: uniped versus biped organic dyes".energy & environmental science 4.8(2011):3021-3029.