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内蒙古师范大学 化学与环境科学学院 功能材料物理与化学自治区重点实验室,内蒙古 呼和浩特,010022
收稿日期:2013-03-28,
修回日期:2013-06-09,
纸质出版日期:2013-12-15
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李晶晶, 王喜贵. Tb<sup>3+</sup>掺杂ZnO-3SiO<sub>2</sub>发光材料的制备与发光性质[J]. 液晶与显示, 2013,28(6): 817-822
LI Jing-jing, WANG Xi-gui. Preparation and Luminescent Properties of ZnO-3SiO<sub>2</sub>:Tb<sup>3+</sup>[J]. , 2013,28(6): 817-822
李晶晶, 王喜贵. Tb<sup>3+</sup>掺杂ZnO-3SiO<sub>2</sub>发光材料的制备与发光性质[J]. 液晶与显示, 2013,28(6): 817-822 DOI: 10.3788/YJYXS20132806.0817.
LI Jing-jing, WANG Xi-gui. Preparation and Luminescent Properties of ZnO-3SiO<sub>2</sub>:Tb<sup>3+</sup>[J]. , 2013,28(6): 817-822 DOI: 10.3788/YJYXS20132806.0817.
采用溶胶-凝胶法制备了Tb
3+
掺杂的ZnO-3SiO
2
发光材料,通过DTA-TG、IR、XRD、SEM、激发和发射光谱图对其结构和发光性能进行了分析。DTA-TG测试表明,20~400℃出现明显失重现象,说明在此过程中凝胶中的吸附水、乙醇等物质发生了脱附释放;XRD测试证明,材料属于非晶态;SEM显示形成了表面光滑的四面体和多面体颗粒;IR光谱显示,样品制备过程中SiOSi桥氧键和非桥氧键的转变对材料的发光有较大影响。激发和发射光谱图显示,材料制备的最佳退火温度为600℃,Tb
3+
在ZnO-3SiO
2
基质中的掺杂量为2.75%(摩尔分数)时发光最好。在544 nm监测波长下,测得的最佳激发波长为紫外光377 nm,即在377 nm光激发下,材料发射的绿光单色性好。
Tb
3+
doped ZnO-3SiO
2
luminescent materials was prepared by the Sol-Gel method. The crystal structure and the luminescent properties of the samples are measured and characterized by using the method of DTA-TG
IR
XRD
SEM and excitation and emission spectra
respectively. The DTA-TG analysis shows that the weight loss is obvious in the tempe-rature range of 20~400℃
and this phenomenon corresponds to the loss of dissociated water and ethanol. The IR spectra show that the change between the bridge oxygen bonds and the non bridge oxygen bonds during the sample preparation has a large influence on the luminous efficiency. Powder XRD analysis indicates that the samples belong to the non-crystal materials. SEM of samples show that it forms grain structure of tetrahedron and polyhedron. The excitation and emission spectra show that the best annealing temperature is 600℃ for preparing material and the optimum doping amount of Tb
3+
is 2.75%(at%).It also shows that the best excitation light is the ultraviolet light with the wavelength of 377 nm when the wavelength of the monitoring light is 544 nm
that is to say
the monochromaticity and the luminescent intensity of green lights excited from the samples are optimum when the wavelength of the excitation light is 377 nm.
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