基于CNT-Ni丝状阴极的场发射荧光灯

Field Emission Fluorescence Lamp Based on CNT-Ni Linear Cathode

采用电泳法在金属镍(Ni)丝表面沉积碳纳米管(CNT)材料,制备成CNT-Ni丝状阴极,并在圆柱形玻璃灯管中对其进行二极结构的场发射性能测试。结果表明,CNT材料呈网状结构均匀平铺于Ni丝表面,CNT-Ni丝状阴极具有良好的场发射性能,开启场强为0.82V/μm;当阳压为3400V时,电流为2.3mA,发光亮度达到7500cd/m2;阳压为4000V时,丝状阴极场发射电流连续测试10h变化不大。

CNT-Ni linear cathode is fabricated by electrophoretic deposition method, and its field emission properties are measured in the cylinder glass tube. There is a homogeneous layer of CNT reticulation on the surface of linear cathode. The field emission measurement shows that the linear cathode possesses good properties, such as low turn-on electric field of 0.82 V/μm, the current of 2.3 mA at the voltage 3 400 V, high luminance brightness of 7 500 cd/m^2, and at the voltage 4 000 V, the emission current of CNT-Ni linear cathode without significant degradation after 10 h.