一种新型红色长余辉材料的设计与合成  

Design and synthesis of a new red long afterglow material

作　　者：刘东伟 王育华[1] LIU Dongwei;WANG Yuhua(College of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学物理科学与技术学院,兰州730000

出　　处：《功能材料》2020年第9期9166-9170,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51672115)。

摘　　要：用高温固相法在1100℃合成了一种新型红色长余辉材料Na9Ge5GaZn4O10:xPr^3+。X射线粉末衍射确定了合成的样品为单相,利用漫反射光谱计算的带隙为5.14 eV。在650 nm的监控波长下,激发峰位于483 nm处。在483 nm的激发下,样品呈现527、611、650、713和730 nm发射峰,其中在650 nm处的发射峰最强,显红光。最佳掺杂浓度为2%即Na9Ge5GaZn4O10:0.2Pr^3+的余辉时间约为2.5 h。通过样品的热释光分析其陷阱情况,并计算陷阱深度,约为0.65 eV。最后通过余辉机理图介绍了样品的余辉机理。A new red long afterglow phosphor Na9Ge5GaZn4O10:Pr^3+was synthesized by high temperature solid phase method at 1100℃.The synthesized sample was determined to be mono-phase by measuring X-ray powder diffraction,and the bandgap was calculated to be 5.14 eV after measuring the diffuse reflection spectrum of the sample.The emission spectrum of the sample was at 527,611,650,713 and 730 nm,among which the emission peak at 650 nm was the strongest,emitting red light,and the excitation peak was at 483 nm.Then,the decay curve of afterglow of the sample was measured,and the optimal doping concentration was 2%and afterglow time was about 2.5 h.The trap situation was analyzed through thermoluminescence of the sample,and the trap depth was calculated to be about 0.65 eV.Finally,the mechanism of afterglow was briefly described.

关 键 词：红色长余辉 热释光 陷阱 镓锗酸盐 余辉机理 

分 类 号：O433.3[机械工程—光学工程] O616[理学—光学]