采用水热法制备红色荧光粉KLa(MoO4)2∶Eu3+,通过X射线粉末衍射(XRD)、场发射扫描电镜（FE-SEM）和荧光光谱（PL）对样品进行了表征。实验结果表明:pH值是合成样品KLa(MoO4)2∶Eu3+的关键因素, 当溶液pH值接近7时, 荧光粉的纯度较高, 分散性良好、粒度均匀、呈规则球形。这种荧光材料可以被紫外光279 nm、近紫外光395 nm和蓝光465 nm有效激发, 发射主峰位于617 nm, 是一种可应用于白光LED转换用的新型红色荧光粉。

Eu3+-doped KLa(MoO4)2 phosphor was prepared successfully via the hydrothermal process. And it was characterized by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM) and photoluminescence (PL), respectively. The experimental results indicate that the pH values of the reaction solution have important effects on the phase structures and the morphologies of the products. A crystallization pH value of 7 was optimal. This phosphor can be effectively excited by 279, 395, 465 nm and emits red light at 617 nm with line spectra. The optical properties suggest that KLa(MoO4)2∶Eu3+ is an efficient red-emitting phosphor for white LEDs applications.