红色荧光粉KGd(WO_4)_2:Sm^(3+)的制备及发光性能

Preparation and photoluminescence of a red-emitting phosphor KGd(WO_4)_2:Sm^(3+)

采用高温固相法合成KGd(WO4)2:Sm3+荧光粉,样品在近紫外区404nm光激发下发射出Sm3+的特征光谱.通过X射线粉末衍射、荧光光谱等对其进行了表征,并分析了其发光特性,结果表明:在KGd(WO4)2:Sm3+中Sm3+离子最佳的掺杂量为5%(摩尔分数);烧结温度为1 000℃、助熔剂H3BO3的浓度为2%(摩尔分数)时,样品的发光强度最强.

A red - emitting KGd （ WO4 ） 2 ： Sm^3＋ was synthesized by solid - state reaction. It can be effectively excited by ultraviolet （404 nm）, and exhibits a satisfactory red performance. X - ray diffraction and photoluminescence spectra were employed to characterize its spectra property. The results show that the optimal concentration of Sm^3＋ in KGd（ WO4） 2： Sm^3＋ is about 5% （mol） and the proper amount of flux should be around 2% （mol）. The emission intensity becomes stronger as the firing temperature increases from 900 to 1 000℃.