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A Ruthenium‐Based Light‐Harvesting Antenna Bearing an Anthracene Moiety in Dye‐Sensitized Solar Cells
Author(s) -
Vougioukalakis Georgios C.,
Konstantakou Maria,
Pefkianakis Eleftherios K.,
Kabanakis Antonios N.,
Stergiopoulos Thomas,
Kontos Athanassios G.,
Andreopoulou Aikaterini K.,
Kallitsis Joannis K.,
Falaras Polycarpos
Publication year - 2014
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201402096
Subject(s) - chemistry , dye sensitized solar cell , ruthenium , photochemistry , moiety , anthracene , redox , terpyridine , electrolyte , photosensitizer , electrochemistry , electrode , inorganic chemistry , organic chemistry , catalysis , metal
A heteroleptic ruthenium sensitizer ( DV56 ) bearing a terpyridine ligand with an appended phenylanthracene moiety was synthesized and extensively characterized. The physicochemical properties of the light‐harvesting antenna were studied in solution and on sensitized TiO 2 thin film electrodes using a variety of spectroscopic and photoelectrochemical techniques. Contact angle measurements suggest that the DV56 ‐sensitized TiO 2 films are hydrophilic. Raman measurements indicate chemisorption of the dye on the semiconducting surface. Electrochemical studies of the dye show that its first oxidation potential lies well below the I − /I 3 − redox potential, allowing easy regeneration. Moreover, its excited state oxidation potential lies above the TiO 2 conduction band edge, permitting efficient electron injection from the photosensitizer into the semiconductor. I − /I 3 − ‐based liquid redox electrolyte dye‐sensitized solar cells incorporating DV56 ‐sensitized TiO 2 photoelectrodes afford an overall power conversion efficiency of 3.75 %.