介绍了一种高效下转换效应--"量子切割"."量子切割"是由于稀土离子之间的能量传递,使发光材料吸收一个真空紫外光子而放出两个可见光子的过程,为制备高效发光材料提供了新的思路.以Gd3+-Eu3+,Er3+-Gd3+-Tb3+体系为例讨论了"量子切割"机理在发光材料研究方面的一些应用,对其优缺点进行了讨论.
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