Ce^(3+),Tb^(3+)氟化物磷光体的发光性质比较  

The Comparison of Luminescence Properties for Ce^(3+),Tb^(3+) Ions in the Fluorides

作　　者：吴根华[1] 陈荣[2] 张启运[2] 

机构地区：[1]安庆师范学院化学系,安庆246011 [2]北京大学化学与分子工程学院,北京100871

出　　处：《光谱学与光谱分析》2000年第4期560-562,共3页Spectroscopy and Spectral Analysis

基　　金：北京市自然科学基金!(批准号2942006)

摘　　要：采用溶液反应和固相反应分别合成了K3 AlF6基质化合物及KBF4∶Ce,Tb和K3 AlF6∶Ce,Tb等磷光体 ,研究了它们的光谱特性 ,并与KAlF4∶Ce,Tb、CaF2 ∶Tb和AlF3 ∶Ce,Tb等磷光体的发光特性进行了比较。结果发现 ,CaF2 ∶Ce ,Tb、AlF3 ∶Ce ,Tb、KBF4∶Ce,Tb和K3 AlF6∶Ce ,Tb等磷光体中Ce3 +对Tb3 +的能量传递不能有效进行 ,有时Tb3 +甚至对Ce3 +起猝灭作用。仅在KAlF4∶Ce,Tb中Ce3 +能有效地进行能量传递 ,使Tb3 +的发光强度大大增强 ,因而KAlF4有可能成为一种有应用前景的氟铝酸盐类发光材料基质化合物。The matrix K 3AlF 6 was prepared with a reaction of mixture of solution K 2CO 3 upon certain solution of Al(OH) 3 plus HF(40%),dehydrating at 100 ℃ and annealing for 48 h at 600 ℃.A series of phosphors for Ce 3+ ,Tb 3+ ions in complex fluorides KBF 4 and K 3AlF 6 were synthesized by a solid reaction method.Their excitation and emission spectra were determined,compared with phosphors KAlF 4∶Ce,Tb,CaF 2∶Ce,Tb and AlF 3∶Ce,Tb.The results indicated that Ce 3+ could only effectively sensitize Tb 3+ in KAlF 4 and enhance the emission of Tb 3+ significantly.Ce 3+ can not effectively transfer energy to Tb 3+ in matrixes CaF 2,AlF 3,KBF 4 and K 3AlF 6.

关 键 词：氟化物 磷光体 荧光特性 发光材料 掺杂 

分 类 号：O613.41[理学—无机化学]