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用丝网印刷技术在不锈钢基底上制备了碳纳米管场发射阴极,它由一层多壁碳纳米管浆料和一层粘结层组成,这种双层结构增强了碳纳米管与基底之间的结合力和导电性。采用真空封接的工艺实现了碳纳米管场发射阴极在像素管中的应用,像素管以钼网作为栅极,荧光屏作为阳极,在10kV的阳极电压和脉冲模式下得到了均匀并且稳定的发光效果,在50h的测试中没有明显的电流衰减,说明其中的碳纳米管场发射阴极有较长的寿命。另外,制备的像素管具有较低的功耗,有可能应用于户外大屏幕显示器。
A carbon nanotube field emission cathode was prepared on a stainless steel substrate by a screen printing technique. The cathode consists of a multi-walled carbon nanotube slurry and a bonding layer, which enhances the bonding between the carbon nanotubes and the substrate Between the binding force and conductivity. The vacuum sealing process was used to realize the application of carbon nanotube field emission cathode in the pixel tube with the molybdenum mesh as the grid and the phosphor screen as the anode. The uniform and stable emission was obtained under the anode voltage and pulse mode of 10 kV Effect, no significant current decay in the 50h test, indicating that the carbon nanotube field emission cathode has a longer life expectancy. In addition, the prepared pixel tube has lower power consumption, and may be applied to an outdoor large-screen display.