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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3313
Title: Triarylamine-free pyrenoimidazole-containing organic dyes with different Ï€-linkers for dye-sensitized solar cells
Authors: Kumar D.
Thomas K.R.J.
Lee C.-P.
Ho K.-C.
Published in: Asian Journal of Organic Chemistry
Abstract: A series of arylamine-free organic dyes that have a pyrenoimidazole donor, a cyanoacrylic acid acceptor, and different Ï€-linkers were synthesized and characterized by optical, electrochemical, and theoretical investigations. The nature of the Ï€-spacer exerts a significant effect on electronic properties of these dyes. The absorption maxima red-shifts on progressive addition of thiophene units in the conjugation pathway. All the dyes displayed negative solvatochromism indicative of effective solvation of the dyes by polar solvents in the ground state. The oxidation potential of the dyes shifted negatively on introduction of electron rich spacer. TDDFT computations were also performed to explain the optical and electrochemical properties of the dyes. They were demonstrated as sensitizers in dye-sensitized solar cells, the efficiency of which is promising. A piece of the Ï€: A series of amine-free bipolar dyes featuring a pyrenoimidazole donor, a cyanoacrylic acid acceptor, and different Ï€-linkers is reported. The dyes were used as sensitizers in dye-sensitized solar cells and their efficiencies are moderate. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Citation: Asian Journal of Organic Chemistry (2015), 4(2): 164-172
URI: https://doi.org/10.1002/ajoc.201402214
http://repository.iitr.ac.in/handle/123456789/3313
Issue Date: 2015
Publisher: Wiley-VCH Verlag
Keywords: Dye-sensitized solar cells
Fluorenes
Oligothiophenes
Organic dyes
Pyrenoimidazoles
ISSN: 21935807
Author Scopus IDs: 55581439900
57203389297
55050004100
56962715200
Author Affiliations: Kumar, D., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology, Roorkee, 247667, India
Thomas, K.R.J., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology, Roorkee, 247667, India
Lee, C.-P., Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Ho, K.-C., Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Corresponding Author: Thomas, K.R.J.; Organic Materials Laboratory, Department of Chemistry, Indian Institute of TechnologyIndia
Appears in Collections:Journal Publications [CY]

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