White light emission from rare earth activated yttrium silicate nanocrystalline powders and thin films

J. A. Gonzalez-Ortega; E. M. Tejeda; N. Perea; G. A. Hirata; E. J. Bosze; J. McKittrick

doi:10.1016/j.optmat.2004.10.018

White light emission from rare earth activated yttrium silicate nanocrystalline powders and thin films

J. A. Gonzalez-Ortega, E. M. Tejeda, N. Perea, G. A. Hirata, E. J. Bosze, J. McKittrick

Physics

Research output: Contribution to journal › Conference article › peer-review

47 Scopus citations

Abstract

We present a potential rare earth activated white-emitting nanocrystalline phosphor powders produced by combustion synthesis and report their luminescent properties and thin films deposited by pulsed laser ablation. Effects of varying the atomic concentration of rare earth dopants in Y₂SiO ₅:Ce_x,Tb_y (0.0065 < x < 0.0085, 0.010 < y < 0.040), along with morphological, microstructural and photoluminescence (PL) properties were investigated in order to produce white-light emission close to D₆₅ with optimized luminescent efficiency. Characteristic electronic transitions measured from photoluminescence spectra at λ_em = 544 nm (⁵D ₄ → ⁷F₅) in Tb³⁺ and λ_em = 418 nm (5d → ²F_7/2) in Ce³⁺ show that an inductive energy transfer occurs when Tb ³⁺ ions absorbs the energy from Ce³⁺ upon excitation with long-UV photons (λ_exc = 358-380 nm). The optimal concentration for the best luminescence intensity has been obtained in Y ₂SiO₅:Ce_0.0075,Tb_0.025, and the closest to daylight white emission was found with a composition of Y ₂SiO₅:Ce_0.0075,Tb_0.040. These activated phosphors with two rare earth ions in the yttrium silicate host (Y₂SiO₅) represent an efficient way to produce white-light emission close to D₆₅ with chromaticity coordinates of x = 0.225 and y = 0.320.

Original language	English (US)
Pages (from-to)	1221-1227
Number of pages	7
Journal	Optical Materials
Volume	27
Issue number	7
DOIs	https://doi.org/10.1016/j.optmat.2004.10.018
State	Published - Apr 2005
Event	Proceedings of the First Topical Meeting on Nanostructured Materials and Nanotechnology CIO 2004 - Duration: Sep 22 2004 → Sep 24 2004

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

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10.1016/j.optmat.2004.10.018

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title = "White light emission from rare earth activated yttrium silicate nanocrystalline powders and thin films",

abstract = "We present a potential rare earth activated white-emitting nanocrystalline phosphor powders produced by combustion synthesis and report their luminescent properties and thin films deposited by pulsed laser ablation. Effects of varying the atomic concentration of rare earth dopants in Y2SiO 5:Cex,Tby (0.0065 < x < 0.0085, 0.010 < y < 0.040), along with morphological, microstructural and photoluminescence (PL) properties were investigated in order to produce white-light emission close to D65 with optimized luminescent efficiency. Characteristic electronic transitions measured from photoluminescence spectra at λem = 544 nm (5D 4 → 7F5) in Tb3+ and λem = 418 nm (5d → 2F7/2) in Ce3+ show that an inductive energy transfer occurs when Tb 3+ ions absorbs the energy from Ce3+ upon excitation with long-UV photons (λexc = 358-380 nm). The optimal concentration for the best luminescence intensity has been obtained in Y 2SiO5:Ce0.0075,Tb0.025, and the closest to daylight white emission was found with a composition of Y 2SiO5:Ce0.0075,Tb0.040. These activated phosphors with two rare earth ions in the yttrium silicate host (Y2SiO5) represent an efficient way to produce white-light emission close to D65 with chromaticity coordinates of x = 0.225 and y = 0.320.",

author = "Gonzalez-Ortega, {J. A.} and Tejeda, {E. M.} and N. Perea and Hirata, {G. A.} and Bosze, {E. J.} and J. McKittrick",

year = "2005",

month = apr,

doi = "10.1016/j.optmat.2004.10.018",

language = "English (US)",

volume = "27",

pages = "1221--1227",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier B.V.",

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note = "Proceedings of the First Topical Meeting on Nanostructured Materials and Nanotechnology CIO 2004 ; Conference date: 22-09-2004 Through 24-09-2004",

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TY - JOUR

T1 - White light emission from rare earth activated yttrium silicate nanocrystalline powders and thin films

AU - Gonzalez-Ortega, J. A.

AU - Tejeda, E. M.

AU - Perea, N.

AU - Hirata, G. A.

AU - Bosze, E. J.

AU - McKittrick, J.

PY - 2005/4

Y1 - 2005/4

N2 - We present a potential rare earth activated white-emitting nanocrystalline phosphor powders produced by combustion synthesis and report their luminescent properties and thin films deposited by pulsed laser ablation. Effects of varying the atomic concentration of rare earth dopants in Y2SiO 5:Cex,Tby (0.0065 < x < 0.0085, 0.010 < y < 0.040), along with morphological, microstructural and photoluminescence (PL) properties were investigated in order to produce white-light emission close to D65 with optimized luminescent efficiency. Characteristic electronic transitions measured from photoluminescence spectra at λem = 544 nm (5D 4 → 7F5) in Tb3+ and λem = 418 nm (5d → 2F7/2) in Ce3+ show that an inductive energy transfer occurs when Tb 3+ ions absorbs the energy from Ce3+ upon excitation with long-UV photons (λexc = 358-380 nm). The optimal concentration for the best luminescence intensity has been obtained in Y 2SiO5:Ce0.0075,Tb0.025, and the closest to daylight white emission was found with a composition of Y 2SiO5:Ce0.0075,Tb0.040. These activated phosphors with two rare earth ions in the yttrium silicate host (Y2SiO5) represent an efficient way to produce white-light emission close to D65 with chromaticity coordinates of x = 0.225 and y = 0.320.

AB - We present a potential rare earth activated white-emitting nanocrystalline phosphor powders produced by combustion synthesis and report their luminescent properties and thin films deposited by pulsed laser ablation. Effects of varying the atomic concentration of rare earth dopants in Y2SiO 5:Cex,Tby (0.0065 < x < 0.0085, 0.010 < y < 0.040), along with morphological, microstructural and photoluminescence (PL) properties were investigated in order to produce white-light emission close to D65 with optimized luminescent efficiency. Characteristic electronic transitions measured from photoluminescence spectra at λem = 544 nm (5D 4 → 7F5) in Tb3+ and λem = 418 nm (5d → 2F7/2) in Ce3+ show that an inductive energy transfer occurs when Tb 3+ ions absorbs the energy from Ce3+ upon excitation with long-UV photons (λexc = 358-380 nm). The optimal concentration for the best luminescence intensity has been obtained in Y 2SiO5:Ce0.0075,Tb0.025, and the closest to daylight white emission was found with a composition of Y 2SiO5:Ce0.0075,Tb0.040. These activated phosphors with two rare earth ions in the yttrium silicate host (Y2SiO5) represent an efficient way to produce white-light emission close to D65 with chromaticity coordinates of x = 0.225 and y = 0.320.

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SN - 0925-3467

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JO - Optical Materials

JF - Optical Materials

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T2 - Proceedings of the First Topical Meeting on Nanostructured Materials and Nanotechnology CIO 2004

Y2 - 22 September 2004 through 24 September 2004

ER -

White light emission from rare earth activated yttrium silicate nanocrystalline powders and thin films

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