| Original Articles |
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Field Electron Emission from Highly Graphitic Diamond Films with Ball-Like Surface Morphologies |
| LI Yun-jun;YAO Ning;HE Jin-tian;ZHANG Bing-lin;GONG Zhi-ben1 |
| Department of Physics and Henan Fbndamental & Applied Science Institute, Zhengzhou University, Zhengzhou 450052
1Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031
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| Cite this article: |
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LI Yun-jun, YAO Ning, HE Jin-tian et al 1997 Chin. Phys. Lett. 14 633-636 |
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Abstract Chemical vapor deposited diamond films with ball-like surface morphologies for field electron emission are reported on Mo substrates. A transparent conducting thin film anode (indium-tin oxide film coated on glass substrate) technique was used to determine the locations of field emission sites on the film cathode. The emission site density was obtained by counting damage spots on the film anode by optical microscopy. These damage spots, caused by the impact of emission electrons, corresponded to the emission sites. With the ball-like diamond films, a low turn-on filed of 2.1 V/μm and high current density of 4 mA/cm2 from an emitting area of 0.3cm2 were obtained. A field enhancement model and injection mechanism have been developed to explain the low turn-on field and high emission current.
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| Keywords:
79.70.+q
81.15.Gh
73.40.Gk
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Published: 01 August 1997
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| PACS: |
79.70.+q
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(Field emission, ionization, evaporation, and desorption)
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81.15.Gh
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(Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))
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73.40.Gk
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(Tunneling)
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