PL and CL degradation and characteristics of SrAl 2O 4: Eu 2+,Dy 3+ phosphors

H. C. Swart; J. J. Terblans; O. M. Ntwaeaborwa; R. E. Kroon; B. M. Mothudi

doi:10.1016/j.physb.2011.09.112

PL and CL degradation and characteristics of SrAl ₂O ₄: Eu ²⁺,Dy ³⁺ phosphors

H. C. Swart, J. J. Terblans, O. M. Ntwaeaborwa, R. E. Kroon, B. M. Mothudi

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

27 Citations (Scopus)

Abstract

Strontium aluminate phosphors are ideal for luminescent infrastructure materials. Their brightness and persistent glow time are much higher than previously used sulphide phosphors. Strontium aluminates prepared by the solgel and combustion methods are compared with commercially available strontium aluminate. High luminescent efficient SrAl ₂O ₄:Eu ²⁺,Dy ³⁺ pulsed laser deposited (PLD) thin films were also produced using the commercially available powder. Photoluminescence (PL) degradation studies showed that the phosphor intensity decreased about 20% over a period of 2 weeks under ultraviolet (UV) irradiation. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) showed that cathodoluminescence (CL) degradation is due to the formation of SrO due to electron stimulated surface reactions. The light output mechanism of the phosphor is also discussed in more detail.

Original language	English
Pages (from-to)	1664-1667
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	407
Issue number	10
DOIs	https://doi.org/10.1016/j.physb.2011.09.112
Publication status	Published - 15 May 2012
Externally published	Yes

Keywords

Luminescence
Phosphor degradation
SrAl O : Eu ,Dy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2011.09.112

Cite this

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title = "PL and CL degradation and characteristics of SrAl 2O 4: Eu 2+,Dy 3+ phosphors",

abstract = "Strontium aluminate phosphors are ideal for luminescent infrastructure materials. Their brightness and persistent glow time are much higher than previously used sulphide phosphors. Strontium aluminates prepared by the solgel and combustion methods are compared with commercially available strontium aluminate. High luminescent efficient SrAl 2O 4:Eu 2+,Dy 3+ pulsed laser deposited (PLD) thin films were also produced using the commercially available powder. Photoluminescence (PL) degradation studies showed that the phosphor intensity decreased about 20% over a period of 2 weeks under ultraviolet (UV) irradiation. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) showed that cathodoluminescence (CL) degradation is due to the formation of SrO due to electron stimulated surface reactions. The light output mechanism of the phosphor is also discussed in more detail.",

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T2 - Eu 2+,Dy 3+ phosphors

AU - Swart, H. C.

AU - Terblans, J. J.

AU - Ntwaeaborwa, O. M.

AU - Kroon, R. E.

AU - Mothudi, B. M.

PY - 2012/5/15

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AB - Strontium aluminate phosphors are ideal for luminescent infrastructure materials. Their brightness and persistent glow time are much higher than previously used sulphide phosphors. Strontium aluminates prepared by the solgel and combustion methods are compared with commercially available strontium aluminate. High luminescent efficient SrAl 2O 4:Eu 2+,Dy 3+ pulsed laser deposited (PLD) thin films were also produced using the commercially available powder. Photoluminescence (PL) degradation studies showed that the phosphor intensity decreased about 20% over a period of 2 weeks under ultraviolet (UV) irradiation. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) showed that cathodoluminescence (CL) degradation is due to the formation of SrO due to electron stimulated surface reactions. The light output mechanism of the phosphor is also discussed in more detail.

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