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Facile synthesis of monodisperse YAG:Ce3+ microspheres with high quantum yield via an epoxide-driven sol–gel route

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Abstract

Spherical cerium-doped yttrium aluminum garnet (YAG:Ce3+) phosphor particles can achieve both higher packing densities and lower scattering of light, and thus make it possible to obtain excellent white-light-emitting diode performance. In this study, monodisperse YAG:Ce3+ microspheres have been synthesized through a fast epoxide-driven sol–gel route and subsequent heat treatment under a reducing atmosphere. The spherical morphology was mainly influenced by the phase separation and gelation process, which could be controlled by the ratio of water/ethanol. Pluronic F127 was introduced into the sol–gel system to control the size of the YAG:Ce3+ microspheres, which significantly increased the luminescence intensity of the YAG:Ce3+ microspheres. The luminescence quantum yield of the 6 mol% Ce3+ ion doped YAG microspheres was measured to be more than 90%, which was as high as that of commercial YAG:Ce3+ phosphors. This approach may be readily applied to prepare a broad range of rare earth doped microspheres, implying a new route for the preparation of LEDs phosphors with regular shape and high quantum yield.

Graphical abstract: Facile synthesis of monodisperse YAG:Ce3+ microspheres with high quantum yield via an epoxide-driven sol–gel route

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Publication details

The article was received on 29 Jun 2017, accepted on 04 Aug 2017 and first published on 04 Aug 2017


Article type: Paper
DOI: 10.1039/C7TC02909H
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Facile synthesis of monodisperse YAG:Ce3+ microspheres with high quantum yield via an epoxide-driven sol–gel route

    Y. Zhang, X. Qiao, J. Wan, L. Wu, B. Chen and X. Fan, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC02909H

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