Ce~(3+)在YGG中的光谱性质

本文首次报导并讨论Y_3Ga_5O_(12)石榴石中Ce~(3+)离子的漫反射吸收光谱,激发光谱及荧光性质。发现无论在紫外辐射,可见蓝光或电子束激发下,Ce~(3+)激活的YGG均呈现Ce~(3+)的5d-4f充许跃迁吸收和荧光性质。从440nm扩展到680nm附近的宽发射带是由于Ce~(3+)的最低的5d态跃迁到2FJ(J=5/2和7/2)终态结果。和YAG:Ce石榴石相比,YGG中Ce~(3+)的吸收带和发射带的位置向短波移动。

Optical properties of Ce~(3+) in yttrium gallium garnet phosphor

The diffuse reflection, excitation and fluorescence spectra of Ce3+ ions in Y3Ga5O12 garnet phosphor have been studied and discussed at room temperature for the first time. It has been found that the YGG:Ce3+ shows the optical properties of the allowed 5d-4f transition of Ce3+ ions whether under UV radiation or visible blue light or oathoderay excitation. The broad emission band extending from 430 to near 670 nm results from the transition of the lowest 5d level to 2FJ (J=5/2, 7/2) terminal state. In YGG, the optical behaviour of Ce3+ is very similar to that of Ce3+ in YAG, but the positions of absorption and emission bands of Ce3+ shift toward shorter wavelengths.