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Persistent luminescence in the self-activated K2Zr(BO3)2

机译：自激活K 2 Zr（BO 3 ） 2 的持久发光

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This study reports a cyan emitting self-activated persistent phosphor K2Zr(BO3)2. The material is synthesized by solid state reaction method. The persistent phosphor was characterized in detail by X-ray powder diffraction, diffuse reflectance, photoluminescence, persistent luminescence and thermoluminescence spectra. After UV irradiation, the K2Zr(BO3)2 phosphor shows a cyan persistent luminescence dominating at ～485 nm. Both the fluorescence and persistent luminescence are due to charge transfer emission from the central zirconium ion to oxygen in the ligand. The deconvolution of the thermoluminescence curve reveals that there are four traps responsible for the persistent luminescence. The depth of the dominant trap is 0.66 eV. Based on experimental results, the trapping and detrapping processes of the charge carriers are discussed. A rudimentary energy level scheme was proposed to explain the mechanisms of persistent luminescence as well as photoluminescence.
机译：这项研究报告了一种发出青色的自活化持久性荧光粉K 2 Zr（BO 3 ） < sub> 2 。该材料通过固态反应方法合成。通过X射线粉末衍射，漫反射，光致发光，持久性发光和热致发光光谱来详细表征持久性磷光体。紫外线照射后，K 2 Zr（BO 3 ） 2 磷光体显示出在〜485 nm处占主导地位的青色持续发光。荧光和持续发光都是由于电荷从中心锆离子转移到配体中的氧而引起的。热致发光曲线的反卷积表明，存在四个陷阱负责持久性发光。主陷阱的深度为0.66 eV。基于实验结果，讨论了载流子的俘获和去俘获过程。提出了一个基本的能级方案来解释持续发光以及光致发光的机理。

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