Greatly improved photoluminescence properties of the electrodeposited Y_2O_3:Eu~（3+） thin film phosphors by the addition of Na~+ and K~+ ions

摘要

In this work, Y_2O_3:Eu~(3+) thin film phosphors were prepared by electro-deposition method. The effect of Na~+ and K~+ ions on the photoluminescence properties of Y_2O_3:Eu~(3+) thin film phosphor was studied in details. It was found that the addition of Na~+ and K~+ ions could improve the photoluminescence intensity by 3 to 4 times. The highly improved photoluminescence intensity may be caused by different factors. The improved crystallinity and the increased optical volume caused by the flux effect of Na~+ and K~+ ions could be the major reasons for the enhanced photoluminescence intensity. It was also found that the average lifetime of Y_2O_3:Eu~(3+) thin film phosphors could be adjusted by the molar amount of Na~+ and K~+ ions.