[Luminescence properties and energy transfer between Ce3+ and Gd3+ ions in KAlF4:Ce, Gd].
The matrix KAlF4 was prepared with a reaction of mixtures of solution K2CO3 upon certain solution of Al(OH)3 plus HF (40%), dehydrating at 100 degrees C and annealing for 48 h at 450 degrees C. A series of phosphors KAlF4:Ce, Gd were synthesized by a solid reaction method. Their excitation and emission spectra were determined. It was observed that Ce3+ could sensitize Gd3+ in KAlF4 effectively, so as to enhance the emission of Gd3+ significantly. But emission intensity of Gd3 + 6 P1/2-->8S7/2 decreased with the concentration of Gd3+ increased when the concentration of Ce3+ was constant.
Wu
G
G
Department of Chmistry, Anqing Normal College, 246011 Anqing.
Chen
R
R
Zhang
Q
Q