Design and characterization of Eu2+-doped Ba4Si6O16 photostimulated phosphor for optical information storage
Design and characterization of Eu2+-doped Ba4Si6O16 photostimulated phosphor for optical information storage
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用于光信息存储的Eu2掺杂Ba4Si6O16光激励荧光粉的设计与表征
DOI：
10.1016/j.jlumin.2020.117556
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发表时间：
2020
影响因子：
3.6
通讯作者：
Zhou Jiangcong
中科院分区：
文献类型：
--
作者：
Zhao Lite;Liu Tianpeng;An Hongxiang;Wang Hongwei;Lv Kangming;Huang Jianhui;Li Xiaoshuang;Zhou Jiangcong
新型的余辉发光材料由于其存储容量大、成本低、可重复性好等优点，正成为新型信息存储器件的潜在候选材料。本研究通过在Ba 4Si 6 O 16（BSO）基质中共掺杂Eu 2+和La 3+，成功地制备了一种新型的光激励发光材料。首先，系统研究了BSO：xEu ~（2+）的晶体结构、光致发光（PL）和PL激发（PLE）。在紫外光照射下，所制备的BSO：0.02Eu ~（2+）样品具有最好的荧光衰减性能。其次，通过引入陷阱深度工程的方法，在BSO：0.02Eu ~（2+）中引入La ~（3+）离子，也获得了较好的发光性能。利用热释光光谱研究了BSO：Eu ~（2+），La ~（3+）中的陷阱分布和电子运动动力学。最后，通过980/808 nm的光激励实验验证了BSO：Eu 2+，La 3+具有良好的光存储性能，在光信息系统中具有良好的应用前景。此外，根据实验和理论计算结果的分析，提出了BSO：0.02Eu ~（2+），La ~（3+）晶体中Eu ~（2+）和La ~（3+）晶体中Eu ~（2+）和PSL的能级示意图。
Novel persistent luminescence (PersL) phosphors are emerging as potential candidates for up-to-data information storage devices owing to its large memory capacity, low cost, and rewritable capability. In this study, a novel photostimulated luminescence (PSL) phosphor was successfully developed through co-doping Eu2+and La3+ions in Ba4Si6O16(BSO) host. Firstly, the crystal structure, photoluminescence (PL), and PL excitation (PLE) of BSO:xEu2+were studied systematically. Under the UV light source irradiation, the as-prepared BSO:0.02Eu2+sample exhibits the best PersL decay property. Secondly, by applying the strategy of trap depth engineering, outstanding PersL performance is observed when La3+ions were introduced into BSO:0.02Eu2+as well. Moreover, the trap distribution and dynamics of electron motion in BSO: Eu2+, La3+are characterized using methods of thermoluminescence spectra. Finally, verified by 980/808 nm photostimulation, BSO: Eu2+, La3+shows promising application in optical information systems with a good optical storage capacity. In addition, based on the analysis of experiment and theoretical calculation results, a tentative energy level schematic is proposed to illustrate the mechanism of PersL and PSL in BSO:0.02Eu2+, La3+.