碳纳米管膜场发射三极管的制备及特性研究

Fabrication and Properties of Field Emission Triode of Carbon Nanotube Films

对多壁碳纳米管薄膜作为阴极的真空三极结构发光管器件进行了初步研制。研究了器件结构及场发射特性。研究证明碳纳米管薄膜是一种性能优良的冷阴极材料。采用CNTs薄膜为阴极的真空发光管器件可以在10-6～10-7Pa的真空度下稳定工作,并在较低的阳极工作电压下获得较大的电流。在阳极电压为5.8kV,栅压为750V时,在3cm2发射面积上,可获得1.1mA的电流值。器件的发射电流较稳定,且亮度达到1.8×103cd/m2,十分适用于户外大屏幕显示。

Based on our study on field emission from multi-walled experimentally manufactured field emission display （FED） demonstrated an excellent performance of MWNTs as field carbon nanotubes （MWNTs）, this work triode with a MWNTs cold cathode, and emitters. The measured luminance of the phosphor screens was 1.8×10^3 cd/m^2 for green light and the emission is stable at the pressure of 10^-6-10^-7Pa. When grid voltage was 750 V and anode voltage 5. 8 kV, the maximum current of anode attains 1.1 mA at 3 cm^2 emission area, which could be used as lighting elements for outdoor large size displays.