在过去的几十年里,持久性发光材料的研究主要集中在Eu2+掺杂化合物上。然而,非Eu2+材料的年度出版物数量也稳步增长。到现在为止,已知的持久性磷光体的数量已增加到超过200,其中超过80%不是基于Eu2+,而是,在固有主机缺陷上,过渡金属(锰,铬,铜,等。)或三价稀土(铈,铒,铯,等。).在这次审查中,我们概述了这些非Eu2基持久性发光材料及其余辉特性。我们还仔细研究了一些剩余的挑战,例如可见光的兴奋性和多个发光中心之间能量转移的可能性。最后,我们总结了完整描述持久发光材料的必要元素,以便对这些磷光体进行更客观的比较。
During the past few decades, the research on persistent luminescent materials has focused mainly on Eu2+-doped compounds. However, the yearly number of publications on non-Eu2+-based materials has also increased steadily. By now, the number of known persistent phosphors has increased to over 200, of which over 80% are not based on Eu2+, but rather, on intrinsic host defects, transition metals (manganese, chromium, copper, etc.) or trivalent rare earths (cerium, terbium, dysprosium, etc.). In this
review, we present an overview of these non-Eu2+-based persistent luminescent materials and their afterglow properties. We also take a closer look at some remaining challenges, such as the excitability with visible light and the possibility of energy transfer between multiple luminescent centers. Finally, we summarize the necessary elements for a complete description of a persistent luminescent material, in order to allow a more objective comparison of these phosphors.