Rare earth activated yttrium aluminate phosphors with modulated luminescence

L. E. Muresan; E. J. Popovici; I. Perhaita; E. Indrea; J. Oro; N. Casan Pastor

doi:10.1002/bio.3051

Rare earth activated yttrium aluminate phosphors with modulated luminescence

L. E. Muresan, E. J. Popovici, I. Perhaita, E. Indrea, J. Oro, N. Casan Pastor

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

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Abstract

Copyright © 2015 John Wiley & Sons, Ltd. Yttrium aluminate (Y3A5O12) was doped with different rare earth ions (i.e. Gd3+, Ce3+, Eu3+ and/or Tb3+) in order to obtain phosphors (YAG:RE) with general formula,Y3-x-aGdxREaAl5O12 (x = 0; 1.485; 2.97 and a = 0.03). The synthesis of the phosphor samples was done using the simultaneous addition of reagents technique. This study reveals new aspects regarding the influence of different activator ions on the morpho-structural and luminescent characteristics of garnet type phosphor. All YAG:RE phosphors are well crystallized powders containing a cubic-Y3Al5O12 phase as major component along with monoclinic-Y4Al2O9 and orthorhombic-YAlO3 phases as the impurity. The crystallites dimensions of YAG:RE phosphors vary between 38 nm and 88 nm, while the unit cell slowly increase as the ionic radius of the activator increases. Under UV excitation, YAG:Ce exhibits yellow emission due to electron transition in Ce3+ from the 5d level to the ground state levels (2F5/2, 2F7/2). The emission intensity of Ce3+ is enhanced in the presence of the Tb3+ ions and is decreased in the presence of Eu3+ ions due to some radiative or non-radiative processes that take place between activator ions. By varying the rare earth ions, the emission colour can be modulated from green to white and red.

Original language	English
Pages (from-to)	929-936
Journal	Luminescence
Volume	31
Issue number	4
DOIs	https://doi.org/10.1002/bio.3051
Publication status	Published - 1 Jun 2016

Keywords

luminescence
phosphors
rare earth
wet chemical synthesis
yttrium aluminium garnet

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10.1002/bio.3051

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title = "Rare earth activated yttrium aluminate phosphors with modulated luminescence",

abstract = "Copyright {\textcopyright} 2015 John Wiley & Sons, Ltd. Yttrium aluminate (Y3A5O12) was doped with different rare earth ions (i.e. Gd3+, Ce3+, Eu3+ and/or Tb3+) in order to obtain phosphors (YAG:RE) with general formula,Y3-x-aGdxREaAl5O12 (x = 0; 1.485; 2.97 and a = 0.03). The synthesis of the phosphor samples was done using the simultaneous addition of reagents technique. This study reveals new aspects regarding the influence of different activator ions on the morpho-structural and luminescent characteristics of garnet type phosphor. All YAG:RE phosphors are well crystallized powders containing a cubic-Y3Al5O12 phase as major component along with monoclinic-Y4Al2O9 and orthorhombic-YAlO3 phases as the impurity. The crystallites dimensions of YAG:RE phosphors vary between 38 nm and 88 nm, while the unit cell slowly increase as the ionic radius of the activator increases. Under UV excitation, YAG:Ce exhibits yellow emission due to electron transition in Ce3+ from the 5d level to the ground state levels (2F5/2, 2F7/2). The emission intensity of Ce3+ is enhanced in the presence of the Tb3+ ions and is decreased in the presence of Eu3+ ions due to some radiative or non-radiative processes that take place between activator ions. By varying the rare earth ions, the emission colour can be modulated from green to white and red.",

keywords = "luminescence, phosphors, rare earth, wet chemical synthesis, yttrium aluminium garnet",

author = "Muresan, {L. E.} and Popovici, {E. J.} and I. Perhaita and E. Indrea and J. Oro and {Casan Pastor}, N.",

year = "2016",

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doi = "10.1002/bio.3051",

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TY - JOUR

T1 - Rare earth activated yttrium aluminate phosphors with modulated luminescence

AU - Muresan, L. E.

AU - Popovici, E. J.

AU - Perhaita, I.

AU - Indrea, E.

AU - Oro, J.

AU - Casan Pastor, N.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Copyright © 2015 John Wiley & Sons, Ltd. Yttrium aluminate (Y3A5O12) was doped with different rare earth ions (i.e. Gd3+, Ce3+, Eu3+ and/or Tb3+) in order to obtain phosphors (YAG:RE) with general formula,Y3-x-aGdxREaAl5O12 (x = 0; 1.485; 2.97 and a = 0.03). The synthesis of the phosphor samples was done using the simultaneous addition of reagents technique. This study reveals new aspects regarding the influence of different activator ions on the morpho-structural and luminescent characteristics of garnet type phosphor. All YAG:RE phosphors are well crystallized powders containing a cubic-Y3Al5O12 phase as major component along with monoclinic-Y4Al2O9 and orthorhombic-YAlO3 phases as the impurity. The crystallites dimensions of YAG:RE phosphors vary between 38 nm and 88 nm, while the unit cell slowly increase as the ionic radius of the activator increases. Under UV excitation, YAG:Ce exhibits yellow emission due to electron transition in Ce3+ from the 5d level to the ground state levels (2F5/2, 2F7/2). The emission intensity of Ce3+ is enhanced in the presence of the Tb3+ ions and is decreased in the presence of Eu3+ ions due to some radiative or non-radiative processes that take place between activator ions. By varying the rare earth ions, the emission colour can be modulated from green to white and red.

AB - Copyright © 2015 John Wiley & Sons, Ltd. Yttrium aluminate (Y3A5O12) was doped with different rare earth ions (i.e. Gd3+, Ce3+, Eu3+ and/or Tb3+) in order to obtain phosphors (YAG:RE) with general formula,Y3-x-aGdxREaAl5O12 (x = 0; 1.485; 2.97 and a = 0.03). The synthesis of the phosphor samples was done using the simultaneous addition of reagents technique. This study reveals new aspects regarding the influence of different activator ions on the morpho-structural and luminescent characteristics of garnet type phosphor. All YAG:RE phosphors are well crystallized powders containing a cubic-Y3Al5O12 phase as major component along with monoclinic-Y4Al2O9 and orthorhombic-YAlO3 phases as the impurity. The crystallites dimensions of YAG:RE phosphors vary between 38 nm and 88 nm, while the unit cell slowly increase as the ionic radius of the activator increases. Under UV excitation, YAG:Ce exhibits yellow emission due to electron transition in Ce3+ from the 5d level to the ground state levels (2F5/2, 2F7/2). The emission intensity of Ce3+ is enhanced in the presence of the Tb3+ ions and is decreased in the presence of Eu3+ ions due to some radiative or non-radiative processes that take place between activator ions. By varying the rare earth ions, the emission colour can be modulated from green to white and red.

KW - luminescence

KW - phosphors

KW - rare earth

KW - wet chemical synthesis

KW - yttrium aluminium garnet

U2 - 10.1002/bio.3051

DO - 10.1002/bio.3051

M3 - Article

VL - 31

SP - 929

EP - 936

JO - Luminescence

JF - Luminescence

SN - 1522-7235

IS - 4

ER -

Rare earth activated yttrium aluminate phosphors with modulated luminescence

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