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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3297
Title: Effect of Donors on Photophysical, Electrochemical and Photovoltaic Properties of Benzimidazole-Branched Dyes
Authors: Bodedla G.B.
Thomas K.R.J.
Fan M.-S.
Ho K.-C.
Published in: ChemistrySelect
Abstract: A series of benzimidazole-branched organic dyes containing different donors such as carbazole or phenothiazine at C4 and C7 positions of benzimidazole, bithiophene linker and cyanoacrylic acid acceptor are reported. Incorporation of donors increased the molar extinction coefficient of the intramolecular charge transfer absorption peak and contributed to the enhanced photocurrent generation than the control dye without donors. The favourable properties of the new dyes are attributed to the suitable HOMO and LUMO energy levels which facilitated dye regeneration and electron injection from the excited state of the dyes into the conduction band of TiO 2 . The dye-sensitized solar cells fabricated using the dyes possessing phenothiazine-based donor yielded better efficiency than the dyes containing carbazole donor. It is attributed to the effective retardation of electron recombination resulting from the non-planar molecular geometry of the former. These results suggest that opportunities exist for the improvement of benzimidazole-based organic dyes. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Citation: ChemistrySelect (2017), 2(9): 2807-2814
URI: https://doi.org/10.1002/slct.201700014
http://repository.iitr.ac.in/handle/123456789/3297
Issue Date: 2017
Publisher: Wiley-Blackwell
Keywords: density functional theory
dye-sensitized solar cells
Dyes/Pigments
energy conversion
nitrogen heterocycles
UV/Vis spectroscopy
ISSN: 23656549
Author Scopus IDs: 56401178900
57203389297
55179088600
56962715200
Author Affiliations: Bodedla, G.B., Organic Materials Chemistry, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Thomas, K.R.J., Organic Materials Chemistry, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Fan, M.-S., Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Ho, K.-C., Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Funding Details: KRJT is thankful to CSIR (Ref. 02/(0230)/15/EMR-II dated 05–06-2015), New Delhi and DST (Ref. DST/TSG/PT/2013/09), New Delhi for financial support. We are thankful to DST for the purchase of ESI mass spectrometer through the FIST grant to the Chemistry Department, IIT Roorkee.
Corresponding Author: Thomas, K.R.J.; Organic Materials Chemistry, Department of Chemistry, Indian Institute of Technology RoorkeeIndia; email: krjt8fcy@iitr.ac.in
Appears in Collections:Journal Publications [CY]

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