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Terpyridine and Quaterpyridine Complexes as Sensitizers for Photovoltaic Applications

Department of Chemistry and NIS Interdepartmental Centre, University of Torino, Via Giuria 7, I-10125 Torino, Italy
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Academic Editor: Joshua M. Pearce
Materials 2016, 9(3), 137; https://doi.org/10.3390/ma9030137
Received: 15 January 2016 / Revised: 16 February 2016 / Accepted: 22 February 2016 / Published: 27 February 2016
(This article belongs to the Special Issue Photovoltaic Materials and Electronic Devices)
Terpyridine and quaterpyridine-based complexes allow wide light harvesting of the solar spectrum. Terpyridines, with respect to bipyridines, allow for achieving metal-complexes with lower band gaps in the metal-to-ligand transition (MLCT), thus providing a better absorption at lower energy wavelengths resulting in an enhancement of the solar light-harvesting ability. Despite the wider absorption of the first tricarboxylate terpyridyl ligand-based complex, Black Dye (BD), dye-sensitized solar cell (DSC) performances are lower if compared with N719 or other optimized bipyridine-based complexes. To further improve BD performances several modifications have been carried out in recent years affecting each component of the complexes: terpyridines have been replaced by quaterpyridines; other metals were used instead of ruthenium, and thiocyanates have been replaced by different pinchers in order to achieve cyclometalated or heteroleptic complexes. The review provides a summary on design strategies, main synthetic routes, optical and photovoltaic properties of terpyridine and quaterpyridine ligands applied to photovoltaic, and focuses on n-type DSCs. View Full-Text
Keywords: dye-sensitized solar cells; polypyridines; Ru(II) complexes; terpyridines; quaterpyridines dye-sensitized solar cells; polypyridines; Ru(II) complexes; terpyridines; quaterpyridines
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Saccone, D.; Magistris, C.; Barbero, N.; Quagliotto, P.; Barolo, C.; Viscardi, G. Terpyridine and Quaterpyridine Complexes as Sensitizers for Photovoltaic Applications. Materials 2016, 9, 137.

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