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Ce~(3+)离子有一个宽而强的4f-5d吸收带,它能有效地吸收能量。Ce~(3+)离子的荧光寿命非常短,能将能量有效地传递给其它离子起敏化作用。对于Ce~(3+)→Tb~3+),Ce~(3+)→EU~(3+)和Ce~(2+)→Mn~(3+)的敏化作用已有许多报导,并在灯用发光材料上获得应用。Blasse等提出在Ce~(3+)敏化Tb~(3+)时。用Gd~(3+)作中间体能获得高效发光材料。由于Ce~(3+)的5d能级强烈地依赖于基质,其发射波长可以从紫外到红区,而Gd~(3+)的4f-4f跃迁的激发和发射峰值随基质的变化改变不大,因此将有可能呈现不同的Ce~(3+)-Gd~(3+)的能量转移过程。
Ce ~ (3+) ions have a broad and strong 4f-5d absorption band that absorbs energy efficiently. Ce ~ (3+) ions have a very short fluorescence lifetime and can effectively transfer energy to other ions for sensitization. There have been many reports on the sensitization effects of Ce ~ (3+) → Tb ~ 3 +, Ce ~ (3+) → EU ~ (3+) and Ce ~ (2+) ~ Mn ~ (3+) And in light with light-emitting materials to obtain applications. Blasse et al. Proposed Ce ~ (3+) to sensitize Tb ~ (3+). Gd ~ (3+) can be used as an intermediate to obtain high efficient luminescent materials. Since the 5d level of Ce 3+ strongly depends on the host, its emission wavelength can range from ultraviolet to red, and the excitation and emission peaks of 4f-4f transition of Gd 3+ change with the change of substrate Therefore, it is possible to show different energy transfer processes of Ce ~ (3 +) - Gd ~ (3+).