Synthesis and photoluminescence properties of new garnet-type red-emitting Li7La3-xZr2O12:xEu3+ phosphors

被引：36

作者：

Park, K. ^{[1
]}

Hakeem, D. A. ^{[1
]}

Kim, D. H. ^{[1
]}

Jung, G. W. ^{[1
]}

Kim, S. W. ^{[2
]}

机构：

[1] Sejong Univ, Fac Nanotechnol & Adv Mat Engn, Seoul 142747, South Korea

[2] Korea Inst Ceram Engn & Technol, Jinju Si 52851, South Korea

来源：

SCRIPTA MATERIALIA | 2020年 / 179卷

关键词：

Crystalline oxides; Optical properties; Powder processing; Phosphors; Aging; LUMINESCENT PROPERTIES; SOLID-ELECTROLYTE; CRYSTAL-STRUCTURE; LI7LA3ZR2O12; EU3+; CONDUCTIVITY; LI+; TA;

D O I：

10.1016/j.scriptamat.2019.12.039

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The structural and photoluminescence (PL) properties of as-synthesized and aged garnet-type Li7La3-xZr2O12:xEu(3+) (0.02 <= x <= 0.10) phosphors for white light-emitting diode applications were systematically investigated. Li7La3Zr2O12 oxides satisfied the criteria, proposed by F. C. Hawthorne, for the formation of garnet structure. Rietveld refinement results showed that the as-synthesized Li7La3-xZr2O12:xEu(3+) phosphors formed a tetragonal crystal structure (I4(1)/acd space group) and emitted efficient red light. The aging of the Li7La3-xZr2O12:xEu(3+) phosphors induced a gradual transition from the tetragonal to the cubic structure and formed a secondary phase Li2CO3, which yielded a substantial decrease in PL excitation and emission intensities. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：92 / 98

页数：7

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