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Issue 12, 2014
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Visible-emitting hybrid sol–gel materials comprising lanthanide ions: thin film behaviour and potential use as phosphors for solid-state lighting

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Abstract

The synthesis and characterization, as well as the film-forming and luminescent properties of four visible-emitting hybrid organic–inorganic sol–gel materials are reported. They show thermal stability up to 165 °C. Deposition conditions were optimized to coat these materials as homogeneous and transparent thin films (∼50 nm) of a smooth surface, as probed by AFM. They were specifically designed to emit the three primary colours. The blue-emitting material 1 was made up of a polyfluorene derivative embedded into a silica matrix, while the green (2) and red (3)-emissive materials comprise the TbIII and EuIII ions bound to the matrix, respectively. The films showed relatively high emission quantum yield efficiencies, with values of 19% (blue), 46% (green), and 21% (red). The three emitters were used to design a single emissive material (4) that showed emission from yellow-green to blue in a wide range of excitation wavelengths (254–380 nm). In particular, white light was obtained for excitation at 340 nm. The EuIII material was investigated as a potential phosphor coated on an UV LED, and primary investigations on its stability under operating conditions are reported.

Graphical abstract: Visible-emitting hybrid sol–gel materials comprising lanthanide ions: thin film behaviour and potential use as phosphors for solid-state lighting

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Publication details

The article was received on 03 Jul 2014, accepted on 17 Sep 2014 and first published on 18 Sep 2014


Article type: Paper
DOI: 10.1039/C4NJ01110D
Author version available: Download Author version (PDF)
Citation: New J. Chem., 2014,38, 5793-5800
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    Visible-emitting hybrid sol–gel materials comprising lanthanide ions: thin film behaviour and potential use as phosphors for solid-state lighting

    X. Huang, G. Zucchi, J. Tran, R. B. Pansu, A. Brosseau, B. Geffroy and F. Nief, New J. Chem., 2014, 38, 5793
    DOI: 10.1039/C4NJ01110D

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