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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3322
Title: Organic dyes containing fluorene decorated with imidazole units for dye-sensitized solar cells
Authors: Kumar D.
Justin Thomas K.R.
Lee C.-P.
Ho K.-C.
Published in: Journal of Organic Chemistry
Abstract: New organic dyes containing fluorene functionalized with two imidazole chromophores as donors and cyanoacrylic acid acceptors have been synthesized and successfully demonstrated as sensitizers in nanocrystalline TiO 2-based dye-sensitized solar cells (DSSCs). The monoimidazole analogues were also synthesized for comparison. The Sommelet reaction of bromomethylated 2-bromo-9,9-diethyl-9H-fluorene produced the key precursor 7-bromo-9,9-diethyl-9H-fluorene-2,4-dicarbaldehyde required for the preparation of imidazole-functionalized fluorenes. Since the dyes possess weak donor segment, the electron-richness of the conjugation pathway dictated the optical, electrochemical, and photovoltaic properties of the dyes. The dyes served as sensitizers in DSSC and exhibited moderate efficiency up to 3.44%. The additional imidazole present on the fluorene has been found to retard the electron recombination due to the bulkier hydrophobic environment and led to high open-circuit voltage in the devices. © 2014 American Chemical Society.
Citation: Journal of Organic Chemistry (2014), 79(7): 3159-3172
URI: https://doi.org/10.1021/jo500330r
http://repository.iitr.ac.in/handle/123456789/3322
Issue Date: 2014
Publisher: American Chemical Society
ISSN: 223263
Author Scopus IDs: 55581439900
57203389297
55050004100
56962715200
Author Affiliations: Kumar, D., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Justin Thomas, K.R., 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
Corresponding Author: Justin Thomas, K.R.; 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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