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Issue 11, 2011
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“Click-chemistry” approach in the design of 1,2,3-triazolyl-pyridineligands and their Ru(ii)-complexes for dye-sensitized solar cells

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The synthesis of new 1,2,3-triazolyl-pyridine ligands via “click-chemistry” and their corresponding Ru(L)(2,2′-bipyridyl-4,4′-dicarboxylic acid)(NCS)2 complexes (L = 1,2,3-triazolyl-pyridine) are presented. The complexes have been photophysically and electrochemically characterized and have been used as sensitizers in dye-sensitized solar cells (DSSC). In DSSCs with an acetonitrile-based electrolyte the cells comprising of Ru(2-(1-(4-hexylphenyl)-1H-1,2,3-triazol-4-yl)pyridine)(2,2′-bipyridyl-4,4′-dicarboxylic acid)(NCS)2 TBA salt 1 showed an overall power conversion efficiency of 7.8% under full sunlight intensity, and Ru(2-(4-(4-hexylphenyl)-1H-1,2,3-triazol-1-yl)pyridine)(2,2′-bipyridyl-4,4′-dicarboxylic acid)(NCS)2 TBA salt 2 an efficiency of 4.7%. Transient photovoltage and photocurrent decay measurements showed an enhanced performance for dye 1 due to faster electron transport into the TiO2 film and lower recombination rate in comparison to dye 2 sensitized devices. Additionally, solid-state devices were prepared with 2 μm thick TiO2 films using spiro-OMeTAD as a hole-transport material. The solid-state dye-sensitized solar cells showed power conversion efficiencies of 1.92% and 0.38% for sensitizer 1 and 2, respectively.

Graphical abstract: “Click-chemistry” approach in the design of 1,2,3-triazolyl-pyridine ligands and their Ru(ii)-complexes for dye-sensitized solar cells

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Publication details

The article was received on 02 Nov 2010, accepted on 13 Dec 2010 and first published on 31 Jan 2011

Article type: Paper
DOI: 10.1039/C0JM03750H
J. Mater. Chem., 2011,21, 3726-3734

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    “Click-chemistry” approach in the design of 1,2,3-triazolyl-pyridine ligands and their Ru(II)-complexes for dye-sensitized solar cells

    I. Stengel, A. Mishra, N. Pootrakulchote, S. Moon, S. M. Zakeeruddin, M. Grätzel and P. Bäuerle, J. Mater. Chem., 2011, 21, 3726
    DOI: 10.1039/C0JM03750H

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