新型阴极射线荧光薄膜的制备及改善场发射均匀性应用研究

项目名称： 新型阴极射线荧光薄膜的制备及改善场发射均匀性应用研究

项目编号： No.61464001

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 李政林

作者单位： 广西科技大学

项目金额： 46万元

中文摘要： 为改善大面积冷阴极材料的场致电子发射均匀性，本项目拟研制一种能通过光电导效应调控场发射局域电流的新型阴极射线荧光薄膜。当薄膜被特定波长的光源局部照射时，相应区域的阴极材料才能进入大电流老炼状态而改变电子发射能力。经过多步骤的选区电流处理，阴极材料可获得大面积均匀稳定的场发射特性。项目拟重点解决以下问题：构建基于聚合物/无机荧光材料/碳纳米材料的多层复合结构，利用聚合物丰富的网络结构和碳纳米材料良好的导电性能来改善薄膜的热稳定性和导电能力；分析新器件结构下场致电子发射的受调控过程，利用电子束发散效应降低新技术对薄膜在耐流能力和抗轰击能力等方面的要求；测试及改善复合纳米结构的荧光和光电导性能，利用能级结构等理论对相关现象进行机理解释。该类新型荧光薄膜可以应用在其它有关场发射技术的基础研究中。项目研究结果对研制大面积平面光源和高分辨率场发射显示器件具有直接的指导意义。

中文关键词： 场发射；发光材料；光电导；导电聚合物；碳纳米管

英文摘要： In this subject, we will develop novel fluorescent films for cathodoluminescence to improve the uniformity of field emission from large area cold cathode materials. Local field emission current can be regulated by photoconductive mechanisms of the films. Only when specific ray of light irradiate on anodic film, can the corresponding cathodic film turn into large current aging state and change the field emission properties. Uniformity and stability of field emission form large area cold cathode materials will be obtained after several steps of local electric treatment. The highlights of the project mainly include: synthesize multilayer composites based on polymer, inorganic fluorescent materials, and carbon nanomaterials, and improve thermal stability and electrical conductivity of the films by the abundant network structures of polymers and the high conductivity of carbon nanomaterials; analyze the regulated course of electric emission, and reduce the requirements for anti breakdown ability of the films by designing appropriate device structure and utilizing beam divergence effect; test and imporve the performances of fluorescence and photoconduction of the films, and explain related mechanisms by energy level structure theory. The novel fluorescent films have potential applications for other basic researches related to field emission technology. The results have direct significance for preparing planar light sources based on large area cold cathode nanomaterials and high resolution field emission display devices.

英文关键词： field emission;luminescent materials;photoconduction;conductive polymer;carbon nanotube