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Luminescence of Ce3+ multicenters in Ca2+-Mg2+-Si4+ based garnet phosphors

Gorbenko V, Zorenko T, Witkiewicz S, Paprocki K, Iskaliyeva A, Kaczmarek AM, Van Deun R, Khaidukov MN, Batentschuk M, Zorenko Y (2018)

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Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Publisher: Elsevier B.V.

Book Volume: 199

Pages Range: 245-250

DOI: 10.1016/j.jlumin.2018.03.058

Abstract

Comparison of the luminescent properties of Ca₃Sc₂Si₃O₁₂:Ce and Ca₂YMgScSi₃O₁₂:Ce single crystalline films (SCF) phosphors, grown by the liquid phase epitaxy method, was performed in this work. We have observed formation of the Ce³⁺ multicenters in Ca₃Sc₂Si₃O₁₂:Ce and Ca₂YMgScSi₃O₁₂:Ce in the emission and excitation spectra as well as in the decay kinetics of the Ce³⁺ luminescence in SCFs of these garnets. Such Ce³⁺ multicenters possess different crystal field strength due to the inhomogeneous local surroundings of the dodecahedral positions of garnet host at the substitution of the octahedral positions by hetero-valence Mg²⁺ and Sc³⁺ ions and the tetrahedral positions by Si⁴⁺ ions. We confirm the presence of an effective energy transfer between different Ce³⁺ multicenters in Ce³⁺ doped Ca₃Sc₂Si₃O₁₂ and Ca₂YMgScSi₃O₁₂ garnets. The positive trends in variations of the spectroscopic properties of the Ca₂YMgScSi₃O₁₂:Ce garnet with respect to Ca₃Sc₂Si₃O₁₂:Ce garnet were observed also due to substitution of the dodecahedral sites of the garnet host by Y³⁺ ions and the octahedral sites by Mg²⁺ ions, which can be suitable for the development of new converters of white LEDs. Namely, due to the Y³⁺-Mg²⁺ doping, the luminescence spectrum of Ce³⁺ ions in Ca₂YMgScSi₃O₁₂:Ce SCFs significantly extends in the red range in comparison with the Ca₃Sc₂Si₃O₁₂:Ce SCF counterpart. © 2018 Elsevier B.V.

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APA:

Gorbenko, V., Zorenko, T., Witkiewicz, S., Paprocki, K., Iskaliyeva, A., Kaczmarek, A.M.,... Zorenko, Y. (2018). Luminescence of Ce3+ multicenters in Ca2+-Mg2+-Si4+ based garnet phosphors. Journal of Luminescence, 199, 245-250. https://dx.doi.org/10.1016/j.jlumin.2018.03.058

MLA:

Gorbenko, V., et al. "Luminescence of Ce3+ multicenters in Ca2+-Mg2+-Si4+ based garnet phosphors." Journal of Luminescence 199 (2018): 245-250.

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