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The effect of various codopants on the cathodoluminescent properties of Y2O3 : Eu phosphors

Title
The effect of various codopants on the cathodoluminescent properties of Y2O3 : Eu phosphors
Authors
Moon, HRAhn, BTHan, JIPark, YK
Ewha Authors
안병태
SCOPUS Author ID
안병태scopusscopus
Issue Date
1999
Journal Title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
ISSN
0374-4884JCR Link
Citation
vol. 35, pp. S452 - S456
Publisher
KOREAN PHYSICAL SOC
Indexed
SCI; SCIE; SCOPUS; KCI WOS
Abstract
Due to its high luminescence efficiency, high saturation current, and chemical stability, Y2O3:Eu3+ is one of the red phosphor candidates for field emission displays (FED). However, Y2O3:Eu3+ doesn't have enough brightness at low voltage for a FED and doesn't pure a red, but a reddish orange, color. In order to enhance the brightness and the color purity, we studied the photoluminescence, cathodoluminescence, X-ray diffraction, scanning electron microscopy, and current-voltage characteristics of Y2O3:Eu3+ for various Eu3+ concentrations, temperatures, surrounding atmospheres, Al3+ additions, and Ca2+, Cu2+, Cr or In3+ codopings. The brightness was improved when the dopant was added in the form of Eu3+ With Al3+ lather than Eu3+ only. The increase in the brightness could be understood in terms of the decrease in the crystal defects of the host material. Adding other codopants generally decreased the brightness without changing the normalized emission spectra.
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자연과학대학 > 화학·나노과학전공 > Journal papers
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