湿化学方法制备Gd_2O_3∶Eu^(3+)红色荧光粉

Gd_2O_3∶Eu^(3+) red phosphor powder prepared by wet chemical methods

利用常用的3种湿化学方法(溶胶-凝胶法、共沉淀法和水热法),分别制备了Gd2O3∶Eu3+红色荧光粉体,并对它们的结构、形貌以及发光性能进行了分析和比较。XRD分析表明,3种湿化学方法制备的Gd2O3∶Eu3+粉体均属立方晶系。荧光光谱分析表明,3种湿化学方法所制备的荧光粉体的最强激发峰都位于256 nm附近,最强发射峰都位于612 nm附近。从荧光图谱中还可以看出,与其他两种方法相比,水热法所制备的样品有更强的激发峰和发射峰,其发光性质最佳。

Gd2O3∶ Eu^3＋ red phosphor powder samples were prepared by normally used wet chemical methods（sol-gel,co-precipitation and hydrothermal）,and their characteristics of structure and luminescence were analyzed by wide-angle X-ray diffraction（XRD）and spectrometry,The results showed that they all exhibit cubic structure and with a dominant peak at 612 nm due to the ^5D0→^7F2 transition of Eu^3＋;and the excitation spectrum showed a dominant peak at 256 nm due to the charge-transfer transition.It also can be found from the fluorescence spectrum that the intensity of both emission and excitation spectrums of the sample prepared by hydrothermal method was stronger than that of others,suggesting that the sample prepared by hydrothermal method is with better photoluminescence performance.