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Dinuclear Ru-Cu complexes : electronic characterisation and application to dye-sensitised solar cells

McCall, Keri L., Jennings, James R., & Wang, Hongxia (2011) Dinuclear Ru-Cu complexes : electronic characterisation and application to dye-sensitised solar cells. European Journal of Inorganic Chemistry, 2011(4), pp. 589-596.

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Abstract

Dye-sensitised solar cells have emerged as an important developing technology for low-cost solar energy conversion and a crucial element of these is the dye, responsible for light harvesting and control of interfacial electron-transfer processes.[1] A number of examples of dye exist in the literature which link a ruthenium polypyridyl complex to another platinum group metal complex such as Ru (II), Os (II), Re (I) or Rh (III) via a bridging ligand.[2-6] These systems are often referred to as heterosupramolecular triads when adsorbed on the surface of TiO2 as the semiconductor becomes an active component in the system. A number of problems can arise with these types of sensitisers, for example if a flexible linker, e.g. bis-pyridylethane, is used to couple the two complexes it can be hard to control the orientation of the whole dye. This may lead to the resultant dye cation hole being closer to the surface than desired, and hence the long-lived charge-separated state is not achieved. In addition the size of these dyes may be much larger than that of a mononuclear complex and can lead to poor pore filling on the TiO2 and lower dye coverage, leading to a lower efficiency cell.[7] Despite these issues, efficient charge-separation has been achieved with polynuclear complexes and a long-lived state on the millisecond timescale has been observed for a trinuclear ruthenium complex.[8]

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ID Code: 45847
Item Type: Journal Article
Keywords: Ruthenium, Copper, Dinuclear Complexes, Dye-sensitized Solar Cells, Supramolecular Chemistry
DOI: 10.1002/ejic.201001039
ISSN: 0434-1948
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200) > Inorganic Green Chemistry (030203)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200) > Transition Metal Chemistry (030207)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Photodetectors Optical Sensors and Solar Cells (090605)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Copyright Statement: The definitive version is available at www3.interscience.wiley.com
Deposited On: 10 Oct 2011 08:53
Last Modified: 01 Mar 2012 09:10

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