A novel green-emitting long persistent luminescence (LPL) phosphor CaSr₂Al₂O₆:Tb³⁺ (CSA:Tb³⁺) has been developed by traditional solid-state reaction. The crystal structure, luminescence properties, decay curves and TL curves of CSA: Tb³⁺ are studied in this paper. The distribution of Ca, Sr, Al, O and Tb in phosphors was shown by elemental mapping and photoluminescence under fluorescence microscope. CSA: 0.05Tb shows the strongest luminescence, while CSA: 0.0075Tb exhibits the best LPL of 57 min. In order to study the mechanism of afterglow, the trap depth and distribution was analyzed by measuring the TL curves. By measuring the afterglow at high temperature, it is found that the afterglow also presents a high intensity at 464 K, indicating that CSA: 0.0075Tb³⁺ can be potentially applied above the room temperature.

通过传统的固相反应已经开发出一种新型的绿色发光长持续发光（LPL）磷光体CaSr ₂ Al ₂ O ₆：Tb ³⁺（CSA：Tb ³⁺）。CSA：Tb ³⁺的晶体结构，发光特性，衰减曲线和TL曲线本文进行了研究。通过荧光显微镜下的元素图谱和光致发光显示了Ca，Sr，Al，O和Tb在荧光粉中的分布。CSA：0.05Tb显示最强的发光，而CSA：0.0075Tb显示57分钟的最佳LPL。为了研究残光的机理，通过测量TL曲线分析了陷阱的深度和分布。通过测量高温下的余辉，发现余辉在464 K时也表现出高强度，表明CSA：0.0075Tb ³⁺可以在室温以上使用。