AlON:Ce^(3+)荧光粉的制备及光谱研究

Synthesis and photoluminescence of AlON: Ce^(3+) phosphors

采用高温固相法合成了不同浓度Ce3+掺杂的AlON荧光粉.通过X射线和扫描电镜分析了荧光粉的物相和显微结构,且利用荧光光谱仪测试了AlON:Ce3+荧光粉的发光光谱.结果表明,荧光粉在305nm紫外激发下发射390nm为中心的蓝光.温度依赖荧光谱测试发现,AlON:Ce3+荧光粉在150℃下发射强度能保持室温发射强度的86%.因此,该荧光粉是大功率白光发光二极管用最佳荧光粉的候选材料之一.

In this paper, AlON phosphors doped with Ce^3＋ are prepared by solid-state reaction method. Phases, microstructures and optical properties of the synthesized phosphors are characterized by X-ray diffraction and scanning electron microscopy and photoluminescence. The results indicate that AlON^3＋： Ce phosphors emit the blue light centered at 390 nm under the excitation of 305 nm. The emission intensity of AlON： Ce^3＋ at 150 ℃ is about 86% of that measured at room temperature. It demonstrates that the AlON： Ce^3＋ has a great potential in applications of high-density white light-emitting diodes.