Synthesis and characterization of a series of cobalt complexes: Investigation of their efficacy as sensitizers in dye-sensitized solar cell applications

Hegde, V and Sreekala, CO and Kulkarni, NV and Senthurpandi, D and Mathew, J (2022) Synthesis and characterization of a series of cobalt complexes: Investigation of their efficacy as sensitizers in dye-sensitized solar cell applications. In: Journal of Molecular Structure, 1266 .

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Abstract

A series of cobalt(II) complexes possessing diverse structural and electronic properties were prepared by using varieties of ligand systems. All the complexes were thoroughly characterized by spectral and analytical and techniques including X-ray crystallography and the molecular structures were optimized by DFT studies (M06 & B3LYP methods). The theoretical HOMO-LUMO energy gaps were compared with the optical band gap energies calculated using Tauc plot. Utility of the prepared cobalt (II/III) complexes as sensitizers in the dye-sensitized solar cell was investigated. I–V parameters of the fabricated solar cells were noted and compared with the cell made using standard N719 dye. Among the twenty-one complexes investigated, complex C4, comprising of bis(pyrazolyl)methane ligands exhibited highest power conversion efficiency.

Item Type:	Journal Article
Publication:	Journal of Molecular Structure
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to the Elsevier B.V.
Keywords:	Cobalt compounds; Conversion efficiency; Electronic properties; Energy gap; Ligands; Molecular structure; Synthesis (chemical); X ray crystallography, Cell-be; Cell/B.E; Cell/BE; Cobalt complexes; Cobalt complexes (III); DFT study; Dye- sensitized solar cells; Homo-lumo; Power conversion efficiencies; Sensitiser, Dye-sensitized solar cells
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	27 Jul 2022 10:46
Last Modified:	27 Jul 2022 10:46
URI:	https://eprints.iisc.ac.in/id/eprint/74985

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