Investigation of ageing characteristics and identification of surface chemical changes on SrGa 2S 4:Ce 3+ display phosphor under electron beam bombardment

P. A. Moleme; Shreyas S. Pitale; H. C. Swart; O. M. Ntwaeaborwa

doi:10.1016/j.physb.2011.09.107

Investigation of ageing characteristics and identification of surface chemical changes on SrGa ₂S ₄:Ce ³⁺ display phosphor under electron beam bombardment

P. A. Moleme, Shreyas S. Pitale, H. C. Swart, O. M. Ntwaeaborwa

University of The Free State

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

2 Citations (Scopus)

Abstract

Cathodoluminescent ageing characteristics of SrGa ₂S ₄:Ce ³⁺ under prolonged electron beam bombardment was studied and the data are presented. The cathodoluminescent intensity with an increasing Coulomb loading was observed to degrade under different primary electron beam voltages. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) were used to monitor the surface chemical changes during electron beam bombardment and after the degradation process. Auger peak to peak heights monitored during the ageing process suggest a loss in S and C and an initial increase in oxygen concentration on the surface. XPS results indicate the formation of a SrO overlayer due to electron stimulated surface chemical reactions (ESSCRs).

Original language	English
Pages (from-to)	1645-1648
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	407
Issue number	10
DOIs	https://doi.org/10.1016/j.physb.2011.09.107
Publication status	Published - 15 May 2012
Externally published	Yes

Keywords

CL
Electron degradation
PL
SrGa S :Ce

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physb.2011.09.107

Cite this

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title = "Investigation of ageing characteristics and identification of surface chemical changes on SrGa 2S 4:Ce 3+ display phosphor under electron beam bombardment",

abstract = "Cathodoluminescent ageing characteristics of SrGa 2S 4:Ce 3+ under prolonged electron beam bombardment was studied and the data are presented. The cathodoluminescent intensity with an increasing Coulomb loading was observed to degrade under different primary electron beam voltages. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) were used to monitor the surface chemical changes during electron beam bombardment and after the degradation process. Auger peak to peak heights monitored during the ageing process suggest a loss in S and C and an initial increase in oxygen concentration on the surface. XPS results indicate the formation of a SrO overlayer due to electron stimulated surface chemical reactions (ESSCRs).",

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author = "Moleme, {P. A.} and Pitale, {Shreyas S.} and Swart, {H. C.} and Ntwaeaborwa, {O. M.}",

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T1 - Investigation of ageing characteristics and identification of surface chemical changes on SrGa 2S 4:Ce 3+ display phosphor under electron beam bombardment

AU - Moleme, P. A.

AU - Pitale, Shreyas S.

AU - Swart, H. C.

AU - Ntwaeaborwa, O. M.

PY - 2012/5/15

Y1 - 2012/5/15

N2 - Cathodoluminescent ageing characteristics of SrGa 2S 4:Ce 3+ under prolonged electron beam bombardment was studied and the data are presented. The cathodoluminescent intensity with an increasing Coulomb loading was observed to degrade under different primary electron beam voltages. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) were used to monitor the surface chemical changes during electron beam bombardment and after the degradation process. Auger peak to peak heights monitored during the ageing process suggest a loss in S and C and an initial increase in oxygen concentration on the surface. XPS results indicate the formation of a SrO overlayer due to electron stimulated surface chemical reactions (ESSCRs).

AB - Cathodoluminescent ageing characteristics of SrGa 2S 4:Ce 3+ under prolonged electron beam bombardment was studied and the data are presented. The cathodoluminescent intensity with an increasing Coulomb loading was observed to degrade under different primary electron beam voltages. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) were used to monitor the surface chemical changes during electron beam bombardment and after the degradation process. Auger peak to peak heights monitored during the ageing process suggest a loss in S and C and an initial increase in oxygen concentration on the surface. XPS results indicate the formation of a SrO overlayer due to electron stimulated surface chemical reactions (ESSCRs).

KW - CL

KW - Electron degradation

KW - PL

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