量子切割"——一种实现高效下转换的新途径

Quantum Cutting":A New Route to Efficient Downconversion

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。

An efficient downconversion, 'quantum cutting', is introduced. In a 'quantum cutting' process, the luminescent materials absorb one vacuum ultraviolet (VUV) photon and emit two visible photons based on the energy transfer of rare earth metals, which offers a new route to prepare high efficient luminescent materials. Two examples based on the Gd3+Eu3+,Er3+Gd3+Tb3+ systems are supplied to investigate the application of quantum cutting in research of luminescent materials, and the advantages and disadvantages are discussed.