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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3287
Title: Synthesis and characterization of naphthalimide-based dyes for dye sensitized solar cells
Authors: Saini A.
Thomas K.R.J.
Huang Y.-J.
Ho K.-C.
Published in: Journal of Materials Science: Materials in Electronics
Abstract: A set of D–A–π–A dyes containing a carbazole donor, linker composed of a naphthalimide auxiliary acceptor and spacers such as phenyl, oligothiophene, dithienopyrrole and cyanoacrylic acid acceptor have been synthesized and characterized. Influence of spacers on the optical and photovoltaic properties are analyzed. Nature of the spacer between naphthalimide and cyanoacrylic acid show significant effect on the absorption maximum. Elongation of conjugation and increment in electron richness gradually red shift the absorption. It also helps to tune the oxidation potential of the dyes. All dyes possess high-lying LUMO and low-lying HOMO when compared to CB of TiO 2 and reduction potential of iodide electrolyte, which facilitate the electron injection into TiO 2 , and regeneration of the oxidized dye by electrolyte, respectively. A dye containing dithienopyrrole led to maximum photocurrent density of 3.60 mA cm −2 and an open circuit voltage of 519 mV in the series. This is attributed to the diminished resistance for charge transfer and long-lived electron lifetime when compared to the other dyes. The electrochemical impedance spectroscopy revealed small charge recombination resistance at TiO 2 /dye/electrolyte interface for all the dyes attesting the low open circuit voltages of the devices. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
Citation: Journal of Materials Science: Materials in Electronics (2018), 29(19): 16565-16580
URI: https://doi.org/10.1007/s10854-018-9750-4
http://repository.iitr.ac.in/handle/123456789/3287
Issue Date: 2018
Publisher: Springer New York LLC
ISSN: 9574522
Author Scopus IDs: 57189756870
57203389297
57034502600
56962715200
Author Affiliations: Saini, A., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
Thomas, K.R.J., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
Huang, Y.-J., 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 Technology RoorkeeIndia; email: krjt8fcy@iitr.ac.in
Appears in Collections:Journal Publications [CY]

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