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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3327
Title: Functional tuning of phenothiazine-based dyes by a benzimidazole auxiliary chromophore: An account of optical and photovoltaic studies
Authors: Bodedla G.B.
Thomas K.R.J.
Li C.-T.
Ho K.-C.
Published in: RSC Advances
Abstract: We have designed and synthesized a series of organic dyes featuring phenothiazine donors containing an N-phenylbenzimidazole substituent and a cyanoacrylic acid acceptor. Benzimidazole incorporation red-shifted the charge transfer transition and increased the molar extinction coefficient of the peak. It also helped to fine-tune the HOMO and LUMO energies of the dyes due to the electron-withdrawing nature of the benzimidazole. The dye-sensitized solar cells fabricated using the dyes possessing N-phenylbenzimidazole showed efficiency better than the analogous dye without benzimidazole. The hike in the efficiency resulted from the increase in short-circuit current and open circuit voltage. The electrochemical impedance spectroscopy of the devices revealed that the integration of benzimidazole in the dye enhances the life time of the injected electrons in the conduction band of TiO2 and resists electron recombination at the TiO2/dye/electrolyte interface. This journal is © the Partner Organisations 2014.
Citation: RSC Advances (2014), 4(96): 53588-53601
URI: https://doi.org/10.1039/c4ra09300c
http://repository.iitr.ac.in/handle/123456789/3327
Issue Date: 2014
Publisher: Royal Society of Chemistry
ISSN: 20462069
Author Scopus IDs: 56401178900
57203389297
55507636700
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
Li, C.-T., 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 Chemistry, Department of Chemistry, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [CY]

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