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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3307
Title: Organic dyes containing fluoreneamine donor and carbazole Ï€-linker for dye-sensitized solar cells
Authors: Justin Thomas K.R.
Venkateswararao A.
Lee C.-P.
Ho K.-C.
Published in: Dyes and Pigments
Abstract: Abstract A series of new organic dyes containing fluoreneamine-based donor and carbazole Ï€-spacer are reported. These dyes displayed longer wavelength charge transfer absorption when compared to that of the corresponding phenylamine analogs. Fluoreneamine-based donors shifted the lowest unoccupied molecular orbital upwardly which is beneficial for the injection of electrons from the excited dye into the conduction band of TiO<inf>2</inf> and lowered the oxidation potential of the dyes. The electronic perturbations caused by the fluorene unit have been confirmed by the density functional theoretical calculations. A device fabricated using a dye featuring difluorenylaminocarbazole donor and thiophene in the Ï€-spacer exhibited promising power conversion efficiency (6.4%). The interfacial electron transfer kinetics has been elucidated by electrochemical impedance spectroscopy which showed the beneficial role of difluorenylamine unit in suppressing the electron recombination. © 2015 Elsevier Ltd
Citation: Dyes and Pigments (2015), 123(): 154-165
URI: https://doi.org/10.1016/j.dyepig.2015.07.034
http://repository.iitr.ac.in/handle/123456789/3307
Issue Date: 2015
Publisher: Elsevier Ltd
Keywords: Arylamine
Carbazole
Dye-sensitized solar cells
Fluorene
Light-harvesting
TDDFT computations
ISSN: 1437208
Author Scopus IDs: 57203389297
37051266500
55050004100
56962715200
Author Affiliations: Justin Thomas, K.R., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Venkateswararao, A., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Lee, C.-P., Department of Chemical Engineering, National Taiwan UniversityTaipei 10617, Taiwan
Ho, K.-C., Department of Chemical Engineering, National Taiwan UniversityTaipei 10617, Taiwan
Funding Details: KRJT is thankful to DST, New Delhi for generous financial assistance (Ref. No. DST/TSG/PT/2013/09 ). AV acknowledges a research fellowship from UGC, New Delhi. We are also thankful to DST for the purchase of ESI mass spectrometer by a generous FIST grant to the Chemistry Department, IIT Roorkee. Appendix A
Corresponding Author: Justin Thomas, K.R.; Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [CY]

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