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Issue 38, 2009
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Enhanced photovoltaic performance by synergism of light-cultivation and electronic localization for highly efficient dye-sensitized solar cells

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Abstract

Two ruthenium sensitizers, [Ru(dcbpy)(opip)(NCS)2] (JF-1, dcbpy = 4,4′-dicarboxylic acid-2,2′-bipyridine, opip = 2-(4-octylphenyl)-1H-imidazo[4,5-f][1,10]phenanthroline) and [Ru(dcbpy)(otip)(NCS)2] (JF-2, otip = 2-(5-octylthiophen-2-yl)-1H-imidazo[4,5-f][1,10]phenanthroline), with unusually high power-conversion efficiency in comparison with other ruthenium complexes containing 1,10-phenanthroline-based ligands were designed. The power-conversion efficiency of JF-2 is 20% higher than that of JF-1, due to the modification of the ancillary ligand with a thiophene moiety. The origins of this device performance diversity are illustrated by photophysical properties, electrochemical data and density functional theory (DFT) studies. The greater device performance of JF-2 compared to JF-1 was caused from the broader MLCT distribution, the appropriate localization of the frontier orbitals and the stronger driving force of the charge injection and regeneration.

Graphical abstract: Enhanced photovoltaic performance by synergism of light-cultivation and electronic localization for highly efficient dye-sensitized solar cells

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Supplementary files

Article information


Submitted
12 Mar 2009
Accepted
16 Jul 2009
First published
13 Aug 2009

J. Mater. Chem., 2009,19, 7036-7042
Article type
Paper

Enhanced photovoltaic performance by synergism of light-cultivation and electronic localization for highly efficient dye-sensitized solar cells

J. Yin, D. Bhattacharya, Y. Hsu, C. Tsai, K. Lu, H. Lin, J. Chen and K. Ho, J. Mater. Chem., 2009, 19, 7036
DOI: 10.1039/B905103A

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