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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3340
Title: Fluorene-based organic dyes containing acetylene linkage for dye-sensitized solar cells
Authors: Singh P.
Baheti A.
Thomas K.R.J.
Lee C.-P.
Ho K.-C.
Published in: Dyes and Pigments
Abstract: New organic dyes based on diphenylaminofluorene donors, cyanoacrylic acid acceptors and either ethynylbenzene or ethynylthiophene Ï€-spacers have been synthesized and characterized as sensitizers for dye-sensitized solar cells. The dye with thiophene in the conjugation pathway exhibited longer wavelength absorption due to the significant lowering of the LUMO level when compared to the phenyl analog. However, the dye with the phenylacetylene linker displayed promising DSSC characteristics such as short circuit current, open circuit voltage and fill factor indicative of efficient charge generation and injection. The solvatochromic behavior of the dyes were examined in solvents of different polarity and found to exhibit negative solvatochromism of the fluorescence emission suggestive of a nonpolar solvent stabilized excited state with a significant structural reorganization. The TDDFT computations were used to explain the optical properties of the dyes. © 2012 Elsevier Ltd. All rights reserved.
Citation: Dyes and Pigments (2012), 95(3): 523-533
URI: https://doi.org/10.1016/j.dyepig.2012.06.004
http://repository.iitr.ac.in/handle/123456789/3340
Issue Date: 2012
Keywords: Acetylene
Dye-sensitized solar cells
Fluorene
Optical spectra
Organic dyes
TDDFT calculations
ISSN: 1437208
Author Scopus IDs: 56311408100
26638669500
57203389297
55050004100
56962715200
Author Affiliations: Singh, P., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Baheti, A., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Thomas, K.R.J., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, 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
Funding Details: KRJT is thankful to Department of Science and Technology ( DST/TSG/ME/2010/27 ), New Delhi, India for financial support and K.-C.H acknowledges a grant-in-aid from National Science Council , Taiwan. Appendix A
Corresponding Author: Thomas, K.R.J.; Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India; email: krjt8fcy@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

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