Degradation of Y2O3:Eu phosphor powders

O. M. Ntwaeaborwa; K. T. Hillie; H. C. Swart

doi:10.1002/pssc.200404813

Degradation of Y₂O₃:Eu phosphor powders

O. M. Ntwaeaborwa
, K. T. Hillie
, H. C. Swart

University of The Free State

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

15 Citations (Scopus)

Abstract

Degradation of cathodoluminescent (CL) intensity and changes in the surface chemistry of Y₂O₃:Eu phosphor powders were investigated using CL spectroscopy and Auger electron spectroscopy (AES), respectively. Y₂O₃:Eu phosphor powders were exposed to an electron beam of energy 2 keV and a current density of 88.5 mA/cm² at room temperature for different oxygen pressures. The degradation of CL intensity is due to the formation of a non-luminescent "dead layer" on the specimen surface, resulting from non-radiative recombination of electron-hole pairs via surface states.

Original language	English
Pages (from-to)	2366-2371
Number of pages	6
Journal	Physica Status Solidi C: Conferences
Volume	1
Issue number	9
DOIs	https://doi.org/10.1002/pssc.200404813
Publication status	Published - 2004
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

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AU - Hillie, K. T.

AU - Swart, H. C.

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AB - Degradation of cathodoluminescent (CL) intensity and changes in the surface chemistry of Y2O3:Eu phosphor powders were investigated using CL spectroscopy and Auger electron spectroscopy (AES), respectively. Y2O3:Eu phosphor powders were exposed to an electron beam of energy 2 keV and a current density of 88.5 mA/cm2 at room temperature for different oxygen pressures. The degradation of CL intensity is due to the formation of a non-luminescent "dead layer" on the specimen surface, resulting from non-radiative recombination of electron-hole pairs via surface states.

UR - https://www.scopus.com/pages/publications/4444334301

U2 - 10.1002/pssc.200404813

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M3 - Article

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JO - Physica Status Solidi C: Conferences

JF - Physica Status Solidi C: Conferences

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ER -

Degradation of Y₂O₃:Eu phosphor powders

Abstract

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