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[email protected] Core–Shell Quantum Dot-Polymer Multilayer Sensitized TiO2 for Photovoltaics

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Colloidal [email protected] core–shell quantum dots (QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO2 layer for QD-sensitized solar cells. The sensitized films were prepared by alternating the layer-by-layer deposition of water-soluble semiconductor QDs and polycations over mesoscopic TiO2 films. The multilayer build-up, monitored by UV-vis spectroscopy shows an increase in the film absorbance with the number of adsorbed [email protected] layers. The photoluminescence (PL) and photoelectrochemical properties of the multilayers were investigated. The photovoltaic performance of QD-sensitized solar cells is strongly dependent on the film structure and component. The incorporation of the electron mediators of [Co(Phen)3]2+ during the deposition process remarkably enhanced the photocurrent intensity in comparison to that in case of QD/polyelectrolyte multilayers.
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Document Type: Research Article

Publication date: 01 May 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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