摘要
场电子发射是一种独特的量子隧穿效应,也是真空微电子学的基础之一。基于场发射技术的冷阴极发射体一直被视为未来理想的电子发射阴极。石墨烯是一种具备单层碳原子结构的新型碳材料,其电子迁移率高、机械强度高、热导率高,具有稳定的物理化学特性,因此受到科研工作者的广泛关注。与此同时石墨烯具有较高的长径比(横向尺寸与厚度的比值),这一结构特性能够获得较大的场增强因子。石墨烯的上述特性使得其成为具有广阔应用前景的场发射阴极。本文主要综述石墨烯场发射理论的研究进展、石墨烯/石墨烯基场发射阴极的研究现状、场发射阴极结构以及场发射阴极的制备方法,并对场发射领域的石墨烯研究进行了展望。
Field electron emission is a special quantum tunneling effect,and it provides one of the basics of vacuum micro-electronics.Cold cathode which based on filed electron emission was regarded as an ideal electron emission cathode in the future.Graphene which has a two-dimensional structure with single carbon atom layer is a new type of carbon materials,with high electron mobility,good mechanical stiffness,high thermal conductivity,and stable physics and chemical characteristics.It has attracted tremendous interests of the researchers.Meantime,graphene has high aspect ratio（the ratio of lateral size and thickness）,the structure characteristics can obtain large field enhancement factor.The characteristics of graphene mentioned above made it a promising candidate for field electron emission.Theory of graphene field electron emission,development of graphene/graphene-based field emission cathode,the configuration and the preparation methods of the cathode were reviewed and the research about graphene in the field of field electron emission was also forecast.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2015年第1期145-150,共6页
Journal of Materials Science and Engineering
基金
上海市教委重点创新项目(14ZZ137)
上海市研究生创新基金资助项目(JWCXSL1402)
上海理工大学国家级项目培育基金项目(14XPM04)
关键词
石墨烯
场发射
复合阴极
graphene
field emission
composite cathode
