基于二氧化硅纳米结构阵列型电子源的制备及电子发射特性研究

项目名称： 基于二氧化硅纳米结构阵列型电子源的制备及电子发射特性研究

项目编号： No.61205022

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 刘震

作者单位： 西安交通大学

项目金额： 27万元

中文摘要： 电子源是场发射显示器的核心部件，开发制备工艺简单、高发射效率、高稳定性及均匀性的新型电子源是当前光电子显示器件的研究热点。针对当前大多数电子源存在着发射效率低、均匀性和稳定性差以及对真空度要求高等问题，本项目以开发一种可直接激发气体发光的新型电子源为切入点，提出一种制备工艺简单、高发射效率及稳定性的基于二氧化硅纳米结构的新型阵列型电子源，并对其电子发射特性、电子传输机制及电子激发气体发光的机理进行研究；通过研究电子能量分布及电子激发气体的频谱分布，揭示工艺参数、器件结构、二氧化硅纳米颗粒尺寸等参数对电子发射特性的影响规律，阐明电子源的发射机制及电子激发气体发光的机理，获得电子能量分布与气体激发能量的对应关系；结合理论分析与实验验证，探索新型电子源的关键制备工艺并优化器件结构。本研究对提高电子源的发射效率，促进其在光电子显示、传感器、真空紫外光源等领域的应用具有非常重要的研究意义和实用价值。

中文关键词： 电子源；纳米材料；电子发射特性；制备；二氧化硅

英文摘要： Development of a novel electron source with high emission efficiency,uniformity and stability is a hot issue in the research of field emission display since the electron source is a key component for the field emission display device and most of the current electron sources are lower in emission efficiency, uniformity and stability. Desirable features of electron emission devices are high emission current density, low operation voltage, small emission angle and energy dispersion, and high stability. In addition, the simple and easy fabrication process is also important for the device to be used in various applications.In this project,a novel electron source based on nanostructured silicon dioxide array is proposed, which could directly excite the gas without discharge,therefore, it can improve the luminous efficacy of the light source.The proposed electron source is high in emission efficiency and stability and could be fabricated in a simple process.The emission characterstics and the gas directly excited by the electron source are studied,the relationships between the emission efficiency and the fabrication parameters, structure of the device, the dimensions of nanostructured silicon dioxide are investigated, the mechanisms of electron emission from cold cathode and the gas excited by the proposed electron so

英文关键词： Electron source；Nanostructured material；emission characteristic；fabrication method；silicon dioxide