Luminescence investigations on LiAl5O8:Tb 3+ nanocrystalline phosphors

Shreyas S. Pitale; Vinay Kumar; Indrajit Nagpure; O. M. Ntwaeaborwa; H. C. Swart

doi:10.1016/j.cap.2010.08.002

Luminescence investigations on LiAl₅O₈:Tb ³⁺ nanocrystalline phosphors

Shreyas S. Pitale, Vinay Kumar, Indrajit Nagpure, O. M. Ntwaeaborwa, H. C. Swart

University of The Free State

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

29 Citations (Scopus)

Abstract

Tb³⁺-doped porous LiAl₅O₈ nanophosphors were successfully synthesized using a single step combustion method. Structural characterization of the luminescent material was carried out with X-ray diffraction (XRD) analysis and high resolution transmission electron microscopy (HRTEM). Surface composition was estimated from X-ray photoelectron and Auger spectroscopic techniques. The average particle size was estimated as 37 ± 3 nm. Luminescence properties were studied by the photoluminescence spectroscopy. The phosphor showed intense luminescence in the green region due to the magnetic dipole transition of ⁵D₄→ ⁷F₅ of the Tb³⁺ ion at 543 nm under 241 nm excitation. The intense 4f-4f transitions of Tb³⁺ outshine the luminescence from host which would otherwise deteriorate the color quality of the display device under operation.

Original language	English
Pages (from-to)	341-345
Number of pages	5
Journal	Current Applied Physics
Volume	11
Issue number	3
DOIs	https://doi.org/10.1016/j.cap.2010.08.002
Publication status	Published - May 2011
Externally published	Yes

Keywords

LiAlO
Nanophosphors
Photoluminescence
Rare earth ions
Spinel

ASJC Scopus subject areas

General Materials Science
General Physics and Astronomy

Access to Document

10.1016/j.cap.2010.08.002

Cite this

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title = "Luminescence investigations on LiAl5O8:Tb 3+ nanocrystalline phosphors",

abstract = "Tb3+-doped porous LiAl5O8 nanophosphors were successfully synthesized using a single step combustion method. Structural characterization of the luminescent material was carried out with X-ray diffraction (XRD) analysis and high resolution transmission electron microscopy (HRTEM). Surface composition was estimated from X-ray photoelectron and Auger spectroscopic techniques. The average particle size was estimated as 37 ± 3 nm. Luminescence properties were studied by the photoluminescence spectroscopy. The phosphor showed intense luminescence in the green region due to the magnetic dipole transition of 5D4→ 7F5 of the Tb3+ ion at 543 nm under 241 nm excitation. The intense 4f-4f transitions of Tb3+ outshine the luminescence from host which would otherwise deteriorate the color quality of the display device under operation.",

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AU - Pitale, Shreyas S.

AU - Kumar, Vinay

AU - Nagpure, Indrajit

AU - Ntwaeaborwa, O. M.

AU - Swart, H. C.

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AB - Tb3+-doped porous LiAl5O8 nanophosphors were successfully synthesized using a single step combustion method. Structural characterization of the luminescent material was carried out with X-ray diffraction (XRD) analysis and high resolution transmission electron microscopy (HRTEM). Surface composition was estimated from X-ray photoelectron and Auger spectroscopic techniques. The average particle size was estimated as 37 ± 3 nm. Luminescence properties were studied by the photoluminescence spectroscopy. The phosphor showed intense luminescence in the green region due to the magnetic dipole transition of 5D4→ 7F5 of the Tb3+ ion at 543 nm under 241 nm excitation. The intense 4f-4f transitions of Tb3+ outshine the luminescence from host which would otherwise deteriorate the color quality of the display device under operation.

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