[The comparison of luminescence properties for Ce3+, Tb3+ ions in the fluorides].

G Wu, R Chen, Q Zhang

Index: Guang Pu Xue Yu Guang Pu Fen Xi 20(4) , 560-2, (2000)

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Abstract

The matrix K3AlF6 was prepared with a reaction of mixture of solution K2CO3 upon certain solution of Al(OH)3 plus HF (40%), dehydrating at 100 degrees C and annealing for 48 h at 600 degrees C. A series of phosphors for Ce3+, Tb3+ ions in complex fluorides KBF4 and K3AlF6 were synthesized by a solid reaction method. Their excitation and emission spectra were determined, compared with phosphors KAlF4: Ce, Tb, CaF2: Ce, Tb and AlF3: Ce, Tb. The results indicated that Ce3+ could only effectively sensitize Tb3+ in KAlF4 and enhance the emission of Tb3+ significantly. Ce3+ can not effectvely transfer energy to Tb3+ in matrixes CaF2, AlF3, KBF4 and K3AlF6.