不同退火温度下GdF_3∶Eu^(3+)红色荧光粉的发光性能

Photoluminescence properties of Gd F_3∶Eu^(3+) red phosphors after being annealed with different temperature

采用水热法合成了GdF_3∶5%Eu^(3+)红色荧光粉,研究不同退火温度对荧光粉形貌、发光以及显色性能(CIE)的影响。通过比较不同退火温度下荧光粉的发光性能,发现随着退火温度的升高,Eu^(3+)所有发射峰都得到了相应的增强,并且相应的CIE更趋向于红色;但高温退火时,纳米晶之间的团聚更加严重,而且CIE坐标会趋向于某一极限位置。

GdF3 ： 5%Eu3＋ red phosphors were synthesized with Hydrothermal method, the morphology, luminescence proper-ties and the chromaticity coordinates （ CIE） of which were investigated after being annealed with different temperature. By comparing luminescence properties of the as - prepared and annealed phosphors, we found that all emission peaks of Eu3 ＋ i- ons are enhanced with the increase of annealing temperature, and all the characteristic emission peaks of which turn more ro-bust with the increasingly annealing temperature, correspondingly the CIE coordinate turns to red. For the case of higher an-nealing temperature, the nanoparticles will reunite each other and CIE coordinate of corresponding phosphor tend to be an extreme position.