掺Ce^3＋的碱土氟化物的紫外发光特性研究

研究了掺杂稀土离子Ce^3＋的碱土氟化物发光体LiXAlF6：Ce^3＋（X=Ca^2＋，Sr^2＋或Ba^2＋），XBaAlF6：Ce^3＋（X=Li6＋，Na^＋或K^＋）及LiBaXF6：Ce^3＋（X=Al^3＋，Ga^3＋或In^3＋）的紫外发光特性。实验发现，在LiXAlF6=Ce^3＋中，随着X元素原子序数的增大，Ce^3＋的发光峰就向短波方向移动。首次研究了在XBaAlF6：Ce^3＋与LiBaXF6：Ce^3＋中的X元素的一价与三价离子对Ce^3＋发光的影响，发现这些一价与三价离子的原子序数的变化并不影响Ce^3＋的发射光谱的峰值，它们只在晶格中起着填隙和电荷补偿作用，这有利于Ce^3＋的发光，使发光强度有所增强。这些紫外发光可用来增强X射线影像板中所包含的储存辐射的发光体BaFBr：Eu“的发光，使X射线影像板的显像增强。

Study on Ultra-Violet Luminescent Properties of Alkaline Earth Fluoride Phosphors Doped with Rare Earth Ion Ce3+

Studing the uhra-violet （UV） luminescent properties of alkaline earth fluoride phosphors doped with rare earth ion Ce^3＋. Our experiments discover that in LiXAlF6：Ce^3＋（X=Ca^2＋, Sr^2＋ or Ba^2＋）, the emission peak of Ce^3＋ shifts to the shorter wavelength with the increasing of the nuclear number of X elements. However the mono- valent- and tri-valent- cations of X elements in XBaAlF6：Ce^3＋（X=Li^＋, Na^＋ or K^＋） and LiBaXF6：Ce^3＋（X=Al^3＋, Ga^3＋ or In^3＋） do not obviously affect the emission peaks of Ce3＋ and these cations of X elements only act as charge-compensation or blank-filling, which is of benefit to the luminescence of Ce^3＋. These UV-lights can be used to increase the radiation storage phosphor BaFBr：Eu^2＋ in an intensified X-ray imaging plate.