Cathodoluminescent characteristics of green-emitting ZnAl2O4:Mn thin-film phosphors
Cathodoluminescent characteristics of green-emitting ZnAl2O4:Mn thin-film phosphors
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DOI：
10.1007/s00339-003-2211-8
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发表时间：
2008-06
期刊：
影响因子：
--
通讯作者：
Z. Lou;J. Hao
中科院分区：
文献类型：
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作者：
Z. Lou;J. Hao
采用喷雾热解法在硅酸铝陶瓷板上制备了ZnAl 2 O 4：Mn薄膜。研究了薄膜在低至中等激发电压（<5 kV）下的阴极发光（CL）特性。当退火温度高于550 °C时，薄膜呈现出绿色的化学发光，对应于尖晶石结构中Zn 2+四配位的Mn 2+离子在4 T1和6A 1之间的跃迁。色品坐标为x=0.150和y=0.734，主波长为525 nm，色纯度为82%。发光亮度和效率取决于激发电压和电流密度。随着电流密度的增加，观察到饱和效应。当激发电压为4kV，电流密度为38 μ A/cm ~ 2时，获得了540 cd/m ~ 2的发光亮度和4.5lm/W的效率。
Thin films of ZnAl2O4:Mn were grown on aluminosilicate ceramic plates using spray pyrolysis of aqueous solutions. The cathodoluminescence (CL) properties of the films under low to medium excitation voltage (<5 kV) were investigated. The films exhibited green CL after being annealed at temperatures above 550 °C, which corresponds to the transition between4T1and6A1of Mn2+ions located in the tetra coordination of the Zn2+site in the spinel structure. The chromaticity coordinates were x=0.150 and y=0.734 with a dominant wavelength of 525 nm and an 82% color purity. The CL luminance and efficiency depended on the excitation voltage and current density. Saturation effects were observed as the current density increased. A luminance of 540 cd/m2and an efficiency of 4.5 lm/W were obtained at an excitation voltage of 4 kV with a current density of 38 μ A/cm2.