Reticulated vitreous carbon field emission cathodes for light source applications
Reticulated vitreous carbon field emission cathodes for light source applications
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DOI：
10.1116/1.1527956
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发表时间：
2003-01-01
影响因子：
1.4
通讯作者：
Persson, P
中科院分区：
文献类型：
--
作者：
Chakhovskoi, AG;Hunt, CE;Persson, P
网状玻璃碳 (RVC) 被证明是一种可行的阴极发光灯场发射电子源。 RVC 的高空隙体积和多孔结构有助于在表面形成大量自然发射点。发射中心由碳支柱的锋利边缘形成，这是通过对宏观开孔材料进行简单加工而产生的。在真空或开放空气中对发射器进行额外的表面处理有助于增加提取的电流并减少电流波动。电子发射已在 10(-6) 至 10(-8) Torr 真空环境下在 10 至 500 muA 范围内进行了评估。在使用商用阴极发光荧光粉的密封玻璃原型设备中进行了超过 5000 小时的延长寿命测试。二极管和三极管配置的亮度水平超过 10 000 cd/m(2)。制造成本低，加上化学和机械坚固性，使 RVC 成为电子束真空器件应用（例如无汞阴极发光光源）的可行材料。 (C) 2003 年美国真空协会。
Reticulated vitreous carbon (RVC) is demonstrated as a viable field emission electron source for cathodoluminescent lamps. The high void volume and porous structure of RVC help create a large number of natural emission sites on the surface. Emission centers are formed by the sharp edges of the carbon struts, which result from simple machining of the macroscopic open-pore material. Additional surface treatment of the emitters in vacuum or in open, air helps to increase the extracted current and reduce the current fluctuations. Electron emission has been, evaluated in the 10 to 500 muA range, in 10(-6) to 10(-8) Torr vacuum ambient. Extended lifetime tests were carried out for over 5000 h in sealed glass prototype devices utilizing commercial cathodoluminescent phosphors. Brightness levels exceeding 10 000 cd/m(2) were achieved for diode and triode configurations. The low cost of manufacturing, along with chemical and mechanical robustness, make RVC a viable material for electron-beam vacuum device applications such as mercury-free cathodoluminescent light sources. (C) 2003 American Vacuum Society.