LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, B-9000, Ghent, Belgium.
Center for Nano- and Biophotonics (NB-Photonics), Ghent University, B-9000, Ghent, Belgium.
Sci Rep. 2019 Jul 19;9(1):10517. doi: 10.1038/s41598-019-46889-z.
Development of persistent luminescent materials has drawn continuous attention in recent years in view of their potential applications in the fields of security night-vision signage, in vivo bio-imaging and optical data storage. Currently, the normative evaluation of a new persistent luminescent material is focused on the light emission spectrum, the afterglow decay curve and the total duration time of the persistent luminescence. In this paper, we investigate the temperature dependent persistent luminescence in some well-known persistent phosphors and relate this to their thermoluminescence properties. The concept of the optimum working temperature is proposed as a new means for evaluating persistent phosphors. It is shown that there is a clear relation between the efficient temperature range of the afterglow output and the thermoluminescence glow curve. The experimental work is supported by simulations of thermoluminescence and afterglow characteristics. The concept of the optimum working temperature for persistent phosphors can be used as an evaluative criterion for applications in various working environments.
近年来，由于持久发光材料在安全夜视标识、体内生物成像和光学数据存储等领域的潜在应用，引起了人们的持续关注。目前，对新型持久发光材料的规范评估主要集中在发光光谱、余辉衰减曲线和持久发光的总持续时间上。在本文中，我们研究了一些著名的长余辉磷光体的温度相关持久发光，并将其与热致发光性能相关联。提出了最佳工作温度的概念，作为一种新的长余辉磷光体评估方法。结果表明，余辉输出的有效温度范围与热致发光发光曲线之间存在明显的关系。实验工作得到了热致发光和余辉特性模拟的支持。对于持久发光材料，最佳工作温度的概念可以用作在各种工作环境中应用的评估标准。
