Persistent Luminescence in Eu2+-Doped Compounds: A Review

Materials

Koen Van den Eeckhout¹  Philippe F. Smet² 

[1] Lumilab, Department of Solid State Sciences, Ghent University, Krijgslaan 281S1, 9000 Gent, Belgium;

关键词: persistent luminescence;    europium;    thermoluminescence;   

DOI  :  10.3390/ma3042536

来源: mdpi

【 摘 要 】

In 1996, Matsuzawa et al. reported on the extremely long-lasting afterglow of SrAl₂O₄:Eu²⁺ codoped with Dy³⁺ ions, which was more than 10-times brighter than the previously widely used ZnS:Cu,Co. Since then, research for stable and efficient persistent phosphors has continuously gained popularity. However, even today - almost 15 years after the discovery of SrAl₂O₄:Eu²⁺, Dy³⁺ - the number of persistent luminescent materials is still relatively low. Furthermore, the mechanism behind this phenomenon is still unclear. Although most authors agree on the general features, such as the existence of long-lived trap levels, many details are still shrouded in mystery. In this review, we present an overview of the important classes of known persistent luminescent materials based on Eu²⁺-emission and how they were prepared, and we take a closer look at the models and mechanisms that have been suggested to explain bright afterglow in various compounds.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.