TY - JOUR
T1 - The effect of various codopants on the cathodoluminescent properties of Y 2O 3:Eu phosphors
AU - Moon, Hyung Rang
AU - Ahn, Byung Tae
AU - Han, Jeong In
AU - Park, Yong Kuy
PY - 1999
Y1 - 1999
N2 - Due to its high luminescence efficiency, high saturation current, and chemical stability, Y 2O 3:Eu 3+ is one of the red phosphor candidates for field emission displays (FED). However, Y 2O 3:Eu 3+ 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 Y 2O 3:Eu 3+ for various Eu 3+ concentrations, temperatures, surrounding atmospheres, Al 3+ additions, and Ca 2+, Cu 2+, Cr or In 3+ codopings. The brightness was improved when the dopant was added in the form of Eu 3+ with Al 3+ rather than Eu 3+ 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.
AB - Due to its high luminescence efficiency, high saturation current, and chemical stability, Y 2O 3:Eu 3+ is one of the red phosphor candidates for field emission displays (FED). However, Y 2O 3:Eu 3+ 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 Y 2O 3:Eu 3+ for various Eu 3+ concentrations, temperatures, surrounding atmospheres, Al 3+ additions, and Ca 2+, Cu 2+, Cr or In 3+ codopings. The brightness was improved when the dopant was added in the form of Eu 3+ with Al 3+ rather than Eu 3+ 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.
UR - http://www.scopus.com/inward/record.url?scp=0033415637&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0033415637
SN - 0374-4884
VL - 35
SP - S452-S456
JO - Journal of the Korean Physical Society
JF - Journal of the Korean Physical Society
IS - SUPPL. 2
ER -