Temperature Dependency of Trap‐Controlled Persistent Luminescence,Laser & Photonics Reviews

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Temperature Dependency of Trap‐Controlled Persistent Luminescence
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-07-02 , DOI: 10.1002/lpor.202000060
Jiaren Du _{1,

2} , Ang Feng _{1,

2} , Dirk Poelman _{1,

2}

Affiliation

Phosphors featuring persistent luminescence, as distinctive photonic materials, have been explored extensively owing to their unusual properties and commercial interest as self‐sustained emitters in night‐vision surveillance, emergency signage, optical data storage, and in vivo bio‐imaging. However, widespread utilization of persistent phosphors at various outdoor conditions remains a formidable challenge due to the dependence of persistent luminescence performance on the environmental temperature. Here, the relation between the optimum working temperature and thermoluminescence (TL) glow curve is revealed with different TL read‐out approaches. Notably, the optimum working temperature, T_optimum, is proved to be an intrinsic parameter of a persistent phosphor, irrelevant to the TL heating rate. Temperature dependency of trap filling and releasing processes, demonstrated on a benchmark persistent phosphor with multiple trap occupation levels, is investigated to shed more light on temperature‐dependent, trap‐controlled persistent luminescence. This work presents new perspectives on their wide applications in terms of designing and screening persistent phosphors for various ambient conditions, and beyond.

中文翻译：

陷阱控制的持久发光的温度依赖性

具有持久发光特性的磷光体作为独特的光子材料，由于其不寻常的特性和作为夜视监视，紧急指示牌，光学数据存储和体内生物成像中的自持发射器的商业兴趣，已经得到了广泛的研究。然而，由于持久发光性能对环境温度的依赖性，在各种户外条件下持久使用磷光体的广泛使用仍然是一个艰巨的挑战。在此，通过不同的TL读数方法揭示了最佳工作温度与热致发光（TL）辉光曲线之间的关系。值得注意的是，最佳工作温度，Ť_最佳被证明是持久性磷光体的固有参数，与TL加热速率无关。对陷阱填充和释放过程的温度依赖性进行了研究，以具有多个陷阱占据水平的基准持久性磷光体进行了研究，以揭示更多与温度相关的，陷阱控制的持久性发光。这项工作就其在各种环境条件及其他条件下设计和筛选持久性磷光体方面提出了对其广泛应用的新观点。

更新日期：2020-07-02

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