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Synthesis and Photoluminescence Properties of New Garnet-Type Red-Emitting Li 7La 3-XZr 2O 12Eu3+ Phosphors

29 Pages Posted: 20 Dec 2019 Publication Status: Accepted

See all articles by K. Park

K. Park

Sejong University - Faculty of Nanotechnology and Advanced Materials Engineering

D.A. Hakeem

Sejong University - Faculty of Nanotechnology and Advanced Materials Engineering

D.H. Kim

Sejong University - Faculty of Nanotechnology and Advanced Materials Engineering

G.W. Jung

Sejong University - Faculty of Nanotechnology and Advanced Materials Engineering

S.W. Kim

Korea Institute of Ceramic Engineering and Technology (KICET)

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. Li7La3-xZr2O12 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: crystalline oxides, optical properties, oxidation, crystal structure, ceramics

Suggested Citation

Park, K. and Hakeem, D.A. and Kim, D.H. and Jung, G.W. and Kim, S.W., Synthesis and Photoluminescence Properties of New Garnet-Type Red-Emitting Li 7La 3-XZr 2O 12Eu3+ Phosphors. Available at SSRN: https://ssrn.com/abstract=3507451 or http://dx.doi.org/10.2139/ssrn.3507451

K. Park (Contact Author)

Sejong University - Faculty of Nanotechnology and Advanced Materials Engineering ( email )

Korea, Republic of (South Korea)

D.A. Hakeem

Sejong University - Faculty of Nanotechnology and Advanced Materials Engineering

Korea, Republic of (South Korea)

D.H. Kim

Sejong University - Faculty of Nanotechnology and Advanced Materials Engineering

Korea, Republic of (South Korea)

G.W. Jung

Sejong University - Faculty of Nanotechnology and Advanced Materials Engineering

Korea, Republic of (South Korea)

S.W. Kim

Korea Institute of Ceramic Engineering and Technology (KICET)

Jinju, 52861
Korea, Republic of (South Korea)

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