可寻址式碳纳米管薄膜场发射显示器件的研究

发布时间：2018-04-28 13:55

本文选题：碳纳米管场发射 + 丝网印刷　；参考：《浙江大学》2015年硕士论文

【摘要】：碳纳米管作为一种准一维的管状结构材料,具有较大的C-C键能,较高的长径比和大的比表面积,这些赋予了它优异的机械强度,良好的导热性、导电性,稳定的化学性质以及不错的场发射特性等。从而使得碳纳米管在储氢、超级电容、复合材料、锂电池以及生物医学工程等领域有着极其广泛的应用。首先,本文在基础实验部分介绍了阴阳极各种浆料的配制,阴阳极板详细的刻蚀、印刷过程,利用丝印技术印刷制作阴极碳纳米管和阳极荧光粉薄膜,以及它们的烧结过程和处理方法,最后介绍FED器件的简单组装及测试过程。但是这样制作的阴阳极板还不能满足后续的封装实验要求,因此本文还对场发射阴极进行了一些优化,通过各种改进及处理,将其工作电压降低至200-250V之间,并提升其电流密度,从而改善其场发射发光的均匀性和亮度。其次,本文利用化学氧化还原的方法制备出了性能优良的石墨烯,并将其复合到三种碳纳米管中,并测试添加石墨烯后对它们场发射特性的影响。实验发现石墨烯的复合可以提升碳纳米管阴极薄膜的场发射效果；在三种碳纳米管中,DWCNTs的效果最好,开启电场低至0.6V/gm左右,阈值电场低至1.2V/gm左右,电流密度可达到16mA/cm2以上,其次是短而细的I型MWCNTs,电流密度可达到4-8mA/cm2,效果最差的是长而粗的II型MWCNTs,电流密度值一般在2mA/cm2以下。最后,本实验对优化后的阴极和阳极进行真空封装,制作工艺包括利用点胶机对极板进行低熔点玻璃粉点胶,阴阳极的组装和封结,FED器件的真空排气封装等。同时简单介绍了与FED相关驱动电路的工作原理,并将其焊接在FED显示模块的电极上面,最后对组装好的FED模块成功进行了点亮测试。
[Abstract]:As a kind of quasi-one-dimensional tubular structure material, carbon nanotubes have large C-C bond energy, high aspect ratio and large specific surface area, which give them excellent mechanical strength, good thermal conductivity and electrical conductivity. Stable chemical properties and good field emission properties. Carbon nanotubes are widely used in hydrogen storage, super capacitor, composite materials, lithium batteries and biomedical engineering. First of all, in the basic experiment part, this paper introduces the preparation of various kinds of paste of cathode and anode, the detailed etching and printing process of anode and cathode plate, and the production of cathode carbon nanotube and anodic phosphor film by screen printing technology. The sintering process and processing method are also introduced. Finally, the simple assembly and testing process of FED devices are introduced. However, the cathode plate made in this way can not meet the requirements of subsequent packaging experiments. Therefore, the field emission cathode is optimized in this paper. Through various improvements and treatments, the working voltage is reduced to 200-250 V, and the current density is increased. Thus, the uniformity and brightness of the field emission luminescence are improved. Secondly, graphene with excellent properties was prepared by chemical redox method, and was synthesized into three kinds of carbon nanotubes. The effect of graphene addition on their field emission characteristics was tested. It is found that the composite of graphene can enhance the field emission effect of carbon nanotube cathode film, and the effect of 0.6V/gm is the best among the three kinds of carbon nanotubes, the threshold electric field is lower than 0.6V/gm, the threshold electric field is lower than 1.2V/gm, and the current density is higher than 16mA/cm2. The second is the short and fine type I MWCNTs.The current density can reach 4-8 Ma / cm ~ 2. The worst effect is the long and coarse type II MWCNTs. The current density is generally below 2mA/cm2. Finally, the optimized cathode and anode are packaged in vacuum. The fabrication process includes low melting point glass powder dispenser, cathode and cathode assembly and vacuum exhaust packaging of fed device. At the same time, the working principle of the driver circuit related to FED is briefly introduced, and it is welded to the electrode of the FED display module. Finally, the assembled FED module is successfully illuminated and tested.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ127.11;TB383.1

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