A Ru(II) molecular antenna bearing a novel bipyridine–acrylonitrile ligand: Synthesis and application in dye solar cells

Two novel bipyridine-type ligands were synthesized and completely characterized. One of these ligands was used in the synthesis of a new molecular light-harvesting antenna, which was also extensively characterized and utilized in nanocrystalline liquid electrolyte dye-sensitized solar cells. [Displa...

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Bibliographic Details
Published in:Polyhedron 2014-11, Vol.82, p.12-18
Main Authors: Konti, Georgia, Vougioukalakis, Georgios C., Bidikoudi, Maria, Kontos, Athanassios G., Methenitis, Constantinos, Falaras, Polycarpos
Format: Article
Language:English
Subjects:
Bipyridine–acrylonitrile ligand
Dye-sensitized solar cells
Ruthenium(II) complex
Sensitizers
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Summary:Two novel bipyridine-type ligands were synthesized and completely characterized. One of these ligands was used in the synthesis of a new molecular light-harvesting antenna, which was also extensively characterized and utilized in nanocrystalline liquid electrolyte dye-sensitized solar cells. [Display omitted] A new molecular photosensitizer (DK108) was synthesized from the reaction of cis-[Ru(H2dcbpy)2Cl2] with the novel bipyridine-acrylonitrile ligand 5. DK108 was completely characterized by a variety of spectroscopic techniques (one- and two-dimensional NMR, UV–Vis, FTIR, HRMS, Raman, and cyclic voltammetry), its photo-electrochemical properties were thoroughly investigated, and was utilized in nanocrystalline dye-sensitized solar cells. Liquid electrolyte dye solar cells incorporating DK108-sensitized TiO2 photoelectrodes afford overall power conversion efficiencies of 1.3%. Despite the relatively low power conversion efficiencies of DK108-sensitized TiO2 films, their fully transparent nature above 600nm render DK108 suitable for building integration applications and the investigation of fundamental issues related to the sensitization mechanism.
ISSN:0277-5387
DOI:10.1016/j.poly.2014.04.031