论文部分内容阅读
采用传统高温固相法,以钨酸锶为基质材料,掺杂稀土Eu3+制备了可被紫色光有效激发的红色荧光粉Sr1-2xNaxWO4∶Eu3x+。通过测定与分析样品Sr1-2xNaxWO4∶Eu3x+的激发和发射光谱,发现激发光谱在395nm处吸收值最大,发射光谱的发射主峰位于613nm处,属于Eu3+的5D0→7F2特征跃迁。不同的Eu3+掺杂浓度下样品发光强度不同,当x=0.07时发光强度最佳。电荷补偿剂Na+对样品发光强度的影响很大,主要原因是Na+的加入会影响基质的晶体结构,当Na+的含量与Eu3+含量相同时样品发光强度最好,Na+含量增加到一定程度后基质结晶不完善,荧光体的发光强度急剧下降。
The red phosphor Sr1-2xNaxWO4:Eu3x +, which can be effectively excited by purple light, was prepared by the traditional high-temperature solid-state method using strontium tungstate as the matrix material and doped with rare earth Eu3 +. By measuring and analyzing the excitation and emission spectra of Sr1-2xNaxWO4:Eu3x +, the absorption peak at 395nm was found to be the largest, and the main emission peak at 613nm was assigned to the 5D0 → 7F2 transition of Eu3 +. The luminescence intensities of samples with different Eu3 + doping concentration are different, and the luminescence intensity is the best when x = 0.07. The charge compensation Na + has a great influence on the luminescence intensity of the sample. The main reason is that the addition of Na + affects the crystal structure of the matrix. When the content of Na + is the same as that of Eu3 +, the luminescence intensity of the sample is the best. Imperfect, the luminescent intensity of the phosphor drops sharply.