LiXAlF6:xCe3+(X=Ca,Sr,Ba)的发光研究

光激励发光材料一直是人们竞争研究的对象。为在较短的时间内在发光中心存储更多的电子，要寻找一种荧光材料作为光激励发光材料的增感材料，使光激励发光材料敏化，从而提高光激励发光强度，这是提高激发光源利用率的最佳途径。通过对用紫外光源作激发源的光激励发光材料发光机理的研究，确定在紫外波段靠近短波方向的光可能使这种光激励发光材料敏化。Ce^3＋在氟化物体系中的发射通常位于紫外波段，对Ce^3＋掺杂浓度为x的LiXAlF6：xCe^3＋（X=Ca，Sr，Ba，x=0．002～0．012mol）一系列荧光材料作了研究，研究其发光是否在紫外波段，哪种基质更适合需要。采用高温固相法制备，研究该3种化合物的发射光谱及发射光谱随Ce^3＋掺杂浓度的变化。结果找到了最有可能作为用紫外光源作激发源的光激励发光材料的最佳Ce^3＋掺杂浓度的基质LiBaAlF6：xCe^3＋（x=0．010mol）。

Study on Luminescence of LiXAlF6:xCe3+(X=Ca,Sr,Ba)

Storage phosphors are always pursued by the researchers all over the world. Intensifying phosphors are therefore been searched for in order to acquire an equal quantity of stored electrons by lowering exposure dosage. Intensifying phosphors are purported to sensitize storage phosphors and enhance their photo-stimulated luminescence intensities. The wave band near the short UV light is recognized to possibly have intensifying effect on storage phosphors after the study of phosphors' mechanisms. In this paper,a series of LiXAlF6:Ce3+(X=Ca,Sr,Ba) phosphors,whose emission of Ce3+ is always located among UV band,were studied as the candidates of intensifying phosphors. High temperature solid diffusion manner was used in the phosphor preparation. Emission spectra of LiXAlF6:xCe3+(X=Ca,Sr,Ba,x=0.002~0.012 mol) were studied,and according to their luminescence wavelength the optimal compound with optimal doping concentration of Ce3+ was obtained,that is,LiBaAlF6:xCe3+(x=0.010 mol).