Efficiency of cathodoluminescent phosphors for a field-emission light source application
Efficiency of cathodoluminescent phosphors for a field-emission light source application
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DOI：
10.1116/1.1587134
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发表时间：
2003-07-01
影响因子：
1.4
通讯作者：
Hunt, CE
中科院分区：
文献类型：
--
作者：
Chubun, NN;Chakhovskoi, AG;Hunt, CE
本文研究了几种主要类型的阴极射线荧光粉在高亮度（30000 cd/m2）条件下的发光效率。加速电压从4到14 kV变化，电子束电流密度独立地从2到50 μ A/cm（2）变化。在这些条件下，观察到磷光体的热猝灭和电流饱和。由于这些因素的综合影响，发现表征磷光体的最佳方式是绘制效率（以lm/W为单位）对比功率密度（以mW/cm（2）为单位）的图。所得到的曲线图显示了电流负载和升高的温度对磷光体效率的综合影响。在200 mW/cm（2）和10 kV下，测得绿色荧光粉的最佳效率为55 lm/W，蓝色荧光粉为10 lm/W，红色荧光粉为13 lm/W。(C)2003年美国真空学会。
The efficiency of major types of cathodoluminescent phosphors has been investigated at high-brightness (up to 30 000 cd/m(2)) operational conditions using thermionic electron source. The accelerating voltage was varied from 4 to 14 kV and electron beam current density was independently varied from 2 to 50 muA/cm(2). Under those conditions both thermal quenching and current saturation of the phosphors were observed. Due to combined influence of those factors, it was found that the best way to characterize the phosphor is plotting the efficiency (in lm/W) versus the specific power density (in mW/cm(2)) graph. The resulting plots show the integrated influence of current loading and elevated temperature on the phosphor efficiency. The best efficiencies at 200 mW/cm(2) and 10 kV were measured for a green color phosphor -55 lm/W, for a blue one-10 lm/W, and for a red-13 lm/W. (C) 2003 American Vacuum Society.