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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3337
Title: Synthesis and characterization of dianchoring organic dyes containing 2,7-diaminofluorene donors as efficient sensitizers for dye-sensitized solar cells
Authors: Baheti A.
Thomas K.R.J.
Lee C.-P.
Ho K.-C.
Published in: Organic Electronics
Abstract: New metal free dianchoring organic dyes featuring A-Ï€-D-Ï€-D-Ï€-A (acceptor - Ï€ bridge - donor - Ï€ bridge - donor - Ï€ bridge - acceptor) configuration have been designed incorporating fluorene and oligothiophene units and successfully synthesized. Elongating the conjugation pathway between the donor and acceptor units altered the distance between the anchoring sites besides the absorption and redox properties. These dyes exhibited broad and intense absorption when compared to the corresponding monoanchoring donor-Ï€-acceptor congeners. Though the dye containing bithiophene unit exhibited comparatively low Voc due to low electron life time and facile back electron transfer, showed high power conversion efficiency arising from the good light-harvesting capability attributable to the intense absorption peak in the visible region and enhanced interfacial electron transfer rate. This work demonstrates that the smaller distance of separation between the anchoring units increases the insulating capacity of the molecular layer which retards the back electron transfer. © 2013 Elsevier B.V. All rights reserved.
Citation: Organic Electronics (2013), 14(12): 3267-3276
URI: https://doi.org/10.1016/j.orgel.2013.09.038
http://repository.iitr.ac.in/handle/123456789/3337
Issue Date: 2013
Publisher: Elsevier B.V.
Keywords: Absorption spectra
Dianchoring
Dye-sensitized solar cells
Fluorene
Organic dyes
Thiophene
ISSN: 15661199
Author Scopus IDs: 26638669500
57203389297
55050004100
56962715200
Author Affiliations: 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 the Department of Science and Technology, New Delhi, India for financial support (DST/TSG/ME/2010/27) and DST FIST for mass spectral facility. KCH 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.ac.in
Appears in Collections:Journal Publications [CY]

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