Effect of Cathode-Anode Distance on Field Emission Properties for Carbon Nanotube Film Emitters

被引：21

作者：

Liu, Huarong ^{[1
,2
]}

Kato, Shigeki ^{[3
]}

Saito, Yahachi ^{[1
]}

机构：

[1] Nagoya Univ, Dept Quantum Engn, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, Venture Business Lab, Nagoya, Aichi 4648603, Japan

[3] High Energy Accelerator Sci Inst KEK, Tsukuba, Ibaraki 3050801, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2009年 / 48卷 / 01期

关键词：

CURRENT-DENSITY;

D O I：

10.1143/JJAP.48.015007

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The influence of the cathode-anode distance (gap) on field emission (FE) properties is investigated for carbon nanotube film emitters. Any increase in the gap can cause a clear shift in the plot of emission current (I) against applied field (EA) (I-EA Curve) to the low field regime, resulting from an increase in the corresponding field enhancement factor (beta(FN)). However, normalization of these I-E-A curves through the use of the local field (E-L) concept shows that the emission sites are invariant during a change in the gap, although they attain stronger E-L at larger gaps. When a modified Fowler-Nordheim plot [ln(l/E-A(2))-2ln beta(FN) vs 1/E-A] is employed, the plots obtained at various gaps provide a unique intercept with the vertical axis, consistent with the experimental data measured at differing gaps. (c) 2009 The Japan Society of Applied Physics

引用

页数：5

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