论文部分内容阅读
采用原位共沉淀与气氛还原氮化相结合的方法,在1100℃下制备出Ca2AlSi3O_2N5:Sm~(3+)。使用X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)以及稳态瞬态荧光光谱仪(PL)对合成产物的结构、微观形貌和发光特性进行了研究。在287nm紫外光激发下,测得Ca2AlSi3O_2N5:Sm~(3+)的发射光谱为1个多峰宽谱,主峰分别为602nm(4G5/2→6H7/2)和650nm(4G5/2→6H9/2)。研究了Sm~(3+)掺杂浓度对Ca2AlSi3O_2N5:Sm~(3+)红光荧光粉发光性能的影响。结果表明,随着Sm~(3+)掺杂浓度增大,发光强度先增大后减小。
Ca2AlSi3O_2N5: Sm ~ (3+) was prepared at 1100 ℃ by a combination of in-situ coprecipitation and atmospheric reduction nitridation. The structure, microstructure and luminescence properties of the synthesized product were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and steady-state transient fluorescence spectrometer (PL) The emission spectrum of Ca2AlSi3O_2N5: Sm ~ (3+) is 1 multimodal and broad spectrum with the main peaks of 602nm (4G5 / 2 → 6H7 / 2) and 650nm (4G5 / 2 → 6H9 / 2). The effect of Sm 3+ doping concentration on the luminescent properties of Ca 2 AlSi 3 O 2 N 5: Sm 3+ red phosphor was studied. The results show that with the increase of Sm ~ (3 +) doping concentration, the luminescence intensity first increases and then decreases.