Mechanisms of field emission from diamond coated Mo emitters

被引：20

作者：

Schlesser, R ^{[1
]}

McClure, MT ^{[1
]}

McCarson, BL ^{[1
]}

Sitar, Z ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

来源：

关键词：

field emission; molybdenum emitters; diamond films;

D O I：

10.1016/S0925-9635(97)00290-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A combination of field emission energy distribution (FEED) and I-V measurements was used to study the field emission mechanisms of tip-shaped molybdenum emitters electrophoretically coated with nominally intrinsic diamond powders. Field-induced band bending was studied as a function of applied voltage and was interpreted in terms of a two-barrier model. Field emitted electrons originated from the conduction band minimum of diamond. Electron injection at the Mo/diamond interface was identified as the dominant field emission current limiting factor. It was concluded that potential negative electron affinity (NEA) properties of diamond did not contribute to a current enhancement. The latter statement was confirmed by the observation that graphite coatings enhanced emission currents in a similar way to diamond coatings. (C) 1998 Elsevier Science S.A.

引用

页码：636 / 639

页数：4

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