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

K. Park; D. A. Hakeem; D. H. Kim; G. W. Jung; S. W. Kim

doi:10.1016/j.scriptamat.2019.12.039

Synthesis and photoluminescence properties of new garnet-type red-emitting Li₇La_3- _xZr₂O₁₂:xEu³⁺ phosphors

K. Park, D. A. Hakeem, D. H. Kim, G. W. Jung, S. W. Kim

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

The structural and photoluminescence (PL) properties of as-synthesized and aged garnet-type Li₇La_3- _xZr₂O₁₂:xEu³⁺ (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 Li₇La_3- _xZr₂O₁₂:xEu³⁺ phosphors formed a tetragonal crystal structure (I4₁/acd space group) and emitted efficient red light. The aging of the Li₇La_3- _xZr₂O₁₂:xEu³⁺ 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.

Original language	English
Pages (from-to)	92-98
Number of pages	7
Journal	Scripta Materialia
Volume	179
DOIs	https://doi.org/10.1016/j.scriptamat.2019.12.039
Publication status	Published - 2020 Apr 1
Externally published	Yes

Keywords

Aging
Crystalline oxides
Optical properties
Phosphors
Powder processing

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/j.scriptamat.2019.12.039

Cite this

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

abstract = "The structural and photoluminescence (PL) properties of as-synthesized and aged garnet-type Li7La3- xZr2O12:xEu3+ (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:xEu3+ phosphors formed a tetragonal crystal structure (I41/acd space group) and emitted efficient red light. The aging of the Li7La3- xZr2O12:xEu3+ 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.",

keywords = "Aging, Crystalline oxides, Optical properties, Phosphors, Powder processing",

author = "K. Park and Hakeem, {D. A.} and Kim, {D. H.} and Jung, {G. W.} and Kim, {S. W.}",

note = "Funding Information: We acknowledge the financial support by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry & Energy (No. 20 184 030 202 260 ). Funding Information: We acknowledge the financial support by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry & Energy (No. 20184030202260). Publisher Copyright: {\textcopyright} 2020 Acta Materialia Inc.",

year = "2020",

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doi = "10.1016/j.scriptamat.2019.12.039",

language = "English",

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AU - Park, K.

AU - Hakeem, D. A.

AU - Kim, D. H.

AU - Jung, G. W.

AU - Kim, S. W.

N1 - Funding Information: We acknowledge the financial support by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry & Energy (No. 20 184 030 202 260 ). Funding Information: We acknowledge the financial support by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry & Energy (No. 20184030202260). Publisher Copyright: © 2020 Acta Materialia Inc.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - The structural and photoluminescence (PL) properties of as-synthesized and aged garnet-type Li7La3- xZr2O12:xEu3+ (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:xEu3+ phosphors formed a tetragonal crystal structure (I41/acd space group) and emitted efficient red light. The aging of the Li7La3- xZr2O12:xEu3+ 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.

AB - The structural and photoluminescence (PL) properties of as-synthesized and aged garnet-type Li7La3- xZr2O12:xEu3+ (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:xEu3+ phosphors formed a tetragonal crystal structure (I41/acd space group) and emitted efficient red light. The aging of the Li7La3- xZr2O12:xEu3+ 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.

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