Preparation, micro-structure and luminescence properties of ZnGa2O4 glass ceramics Co-doped with Eu3+ and Tb3+ for white LED - Details

author：

Li, W. (Li, W..) ^[1] | Chen, W.-Z. (Chen, W.-Z..) ^[2] | Zheng, C. (Zheng, C..) ^[3]

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Scopus PKU CSCD

Abstract：

Tb3+/Eu3+∶ZnGa2O4　glass　ceramics　were　synthesized　by　sol-gel　method.　The　influence　of　heat　treatment　temperature　on　the　micro-structure　of　the　glass　ceramic,　and　the　luminescence　properties　of　samples　doped　with　different　rare-earth　ions　were　studied.　The　results　show　that　the　precipitation　of　spinel　ZnGa2O4　nano-crystals　among　the　glassy　matrix　after　the　dry　gel　heat-treated　at　the　temperatures　in　the　range　from　800　℃　to　900　℃.　Unfortunately,　the　glass　ceramic　heat-treated　at　1000　℃　was　opaque　due　to　the　crystallization　of　the　glassy　matrix　with　the　precipitation　of　trigonal　Zn2SiO4　and　hexagonal　SiO2.　The　energy　transfer　from　the　ZnGa2O4　nano-crystals　to　the　doped　Tb3+　and　Eu3+　in　the　glass　ceramic　was　proved　by　the　photoluminescence　excitation　spectra.　The　green　and　the　red　emission　from　Tb3+　and　Eu3+　respectively　were　observed　in　the　Tb3+/Eu3+∶ZnGa2O4　glass　ceramic　heat-treated　at　900　℃,　which　combined　with　the　blue　emission　from　ZnGa2O4　nano-crystals　to　realize　the　while　emission　in　the　glass　ceramic.

Keyword：

Glass ceramic; Luminescence property; Sol-gel method; ZnGa2O4

Community：

[ 1 ] [Li, W.]College of Materials Science & Engineering, Fuzhou University, Fuzhou, 350116, China
[ 2 ] [Li, W.]College of Materials Science & Engineering, Fujian University of Technology, Fuzhou, 350118, China
[ 3 ] [Chen, W.-Z.]College of Materials Science & Engineering, Fuzhou University, Fuzhou, 350116, China
[ 4 ] [Chen, W.-Z.]College of Materials Science & Engineering, Fujian University of Technology, Fuzhou, 350118, China
[ 5 ] [Zheng, C.]College of Materials Science & Engineering, Fujian University of Technology, Fuzhou, 350118, China

Reprint 's Address：

[Chen, W.-Z.]College of Materials Science & Engineering, Fuzhou UniversityChina

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Source ：

Journal of Synthetic Crystals

ISSN： 1000-985X

Year： 2014

Issue： 8

Volume： 43

Page： 1938-1943

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 3

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