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Mesoscopic titania solar cells with the tris(1,10-phenanthroline)cobalt redox shuttle: uniped versus biped organic dyes
Liu, Jingyuan1,2; Zhang, Jing2; Xu, Mingfei2; Zhou, Difei2; Jing, Xiaoyan1; Wang, Peng2
2011-08-01
Source PublicationENERGY & ENVIRONMENTAL SCIENCE
ISSN1754-5692
Volume4Issue:8Pages:3021-3029
AbstractThe 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.
DOI10.1039/c1ee01633d
Indexed BySCI
Language英语
WOS IDWOS:000293213600051
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:86[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72272
Collection中国科学院化学研究所
Corresponding AuthorLiu, Jingyuan
Affiliation1.Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Liu, Jingyuan,Zhang, Jing,Xu, Mingfei,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, Jingyuan,Zhang, Jing,Xu, Mingfei,Zhou, Difei,Jing, Xiaoyan,&Wang, Peng.(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, Jingyuan,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.
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