研制了一种六角密排多迭层碳纳米管阴极.在这种结构中, 衬底银电极由烧结的银浆制作在透明锡铟氧化物电极上, 且具有六角形边缘, 相邻衬底银电极交错排列于阴极面板上.用ZnO和SnO2颗粒作为掺杂材料, 在衬底银电极和单一碳纳米管层之间制作了底部混杂层; 单一碳纳米管层中的碳纳米管主要被用于发射阴极电子.给出了六角密排多迭层碳纳米管阴极的制作工艺, 并研究了六角密排多迭层碳纳米管阴极用于电子源的可行性.将氮气作为保护气体, 采用烧结方法除掉制备浆料中的有机粘合剂及其它有机杂质.将六角密排多迭层碳纳米管阴极真空密封进三极场发射显示器中, 能够形成稳定的电子发射电流.测试结果表明, 与普通碳纳米管阴极相比, 六角密排多迭层碳纳米管阴极具有更优的电子发射特性, 其开启电场为1.83 V/μm, 最大电子发射电流为2 718.6 μA; 且其具有良好的电子发射曲线趋势, 当电场强度从2.17 V/μm增强到3.06 V/μm时, 电子发射电流的增幅约为1 410.3 μA.对电子发射电流随时间的波动变化进行了测试, 测试结果显示六角密排多迭层碳纳米管阴极具有可靠且稳定的电子发射电流.绿色发射图像表明六角密排多迭层碳纳米管阴极具有良好的电子发射均匀性及高的电子发射亮度.鉴于其简单的制作结构和制作工艺, 六角密排多迭层碳纳米管阴极具有一定的实际应用性.

A Hexagonal Close-packed Multi-lamination-layer Carbon Nanotube (HCP-MLL-CNT) cathode is proposed. In this scheme, the silver slurry is sintered to form the substrate silver electrode with a hexagon-shaped edge, which is fabricated on the transparent indium-tin-oxide electrode, with a staggered arrangement of the adjacent substrate silver electrode on the cathode faceplate. Using ZnO and SnO2 powders as mixing materials, the base blending layer is formed between the substrate silver electrode and the single CNT layer, whereas the CNTs in single CNT layers are mainly utilized to emit the cathode electrons. The fabrication process of an HCP-MLL-CNT cathode is discussed in detail, and and the feasibility study which the HCP-MLL-CNT cathode is applicable as an electron source is performed. The sintering method, in which the nitrogen gas is used as a protective gas, was adopted to remove the organic binder materials and other organic impurities of the preparation slurry. The HCP-MLL-CNT cathode was vacuum-sealed into the triode field emission display, and a stable electron emission current was formed. The measurement results indicate that the proposed HCP-MLL-CNT cathode possesses the enhanced electron emission characteristics, a low turn-on electric field of 1.83 V/μm, and the increased maximum electron emission current of 2718.6 μA. The HCP-MLL-CNT cathode revealed an excellent electron emission curve trend, in which the increasing range of electron emission current was approx. 1410.3 μA for the electric field enhancement range from 2.17 V/μm to 3.06 V/μm. The fluctuation of the electron emission current with time was also measured, and a reliable and stabile electron emission for HCP-MLL-CNT cathode was experimentally verified. The green emission image was displayed, which corroborated a good electron emission uniformity and high electron emission luminance of the proposed HCP-MLL-CNT cathode. It is shown that a simple fabrication structure and manufacturing process of the proposed HCP-MLL-CNT cathode possesses a high potential for practical applications.