基质中非4f组态的电子态对Pr^(3+)离子发光的影响（英文）

Effects of Non-4f States on Pr^(3+) Luminescence in Phosphors

三价镨离子(Pr^(3+))是一种备受关注的稀土发光离子。学者们在过去几十年里对其发光性质进行了大量的理论和实验研究。在不同的基质材料中,由于非4f组态的电子态与Pr^(3+)离子发光能级相互作用,Pr^(3+)离子可以展现从紫外到红外波段的不同特征的光发射。影响Pr^(3+)离子发光的这些电子态可能源于4f5d激发组态、电荷迁移态或类激子态。本文中,我们以几种具有代表性的发光材料为例,简短地总结和评述了Pr^(3+)离子发光的不同谱形;也尝试解释了几个新颖的实验现象,例如:杂质束缚激子态和电荷迁移态对发光的猝灭影响。我们希望这些相关概念和谱学结果的整理有助于读者更好地理解一些实验上的发光现象,并为设计发光材料提供新的思路。

Different emission wavelengths of Pr3＋ ion,from the ultraviolet to the infrared,may result from the effects of non-4f states in phosphors. Such non-4f states generally refer to the Pr3＋4f5d state,exciton-like state or charge-transfer state. Here,we present a brief review on Pr3＋luminescence by the means of emission spectral measurement in several representative phosphors. Several interesting spectral phenomena are reported and reviewed,including the effects of impurity-trapped exciton state and charge-transfer state on the luminescence quenching in the Pr3＋-activated phosphors. We expect this review is beneficial to the readers to better understand their experimental findings,and to inspire them to design new and improved phosphor systems.