Abstract
Field emission characteristics of undoped polycrystalline diamond films with different structural properties have been investigated. By introducing positive bias voltage and/or increasing CH4/H2 ratio, the film quality is significantly deteriorated together with the increase of nondiamond carbon component and the surface morphologies of the films lost their unique facet shape. The reason for the increase of nondiamond carbon content is described in terms of both the increase of substrate temperature and the excessive generation of CHn radicals. It is confirmed that an increase in the nondiamond carbon content markedly enhances field emission properties of diamond films. From the spatial distribution of emission sites, it is suggested that the transport path of field-emitted electrons depends on the nondiamond carbon content: for the film with a large amount of nondiamond carbon, electrons transport preferentially through the conducting mediums such as grain boundaries while for the film with a relatively small amount of nondiamond carbon, electron transport occurs mainly through the diamond surface.
| Original language | English |
|---|---|
| Pages (from-to) | 7508-7518 |
| Number of pages | 11 |
| Journal | Journal of Applied Physics |
| Volume | 87 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2000 May 15 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Cite this
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Mechanism of field emission from chemical vapor deposited undoped poly crystalline diamond films. / Shim, Jae Yeob; Baik, Hong Koo; Song, Kie Moon.
In: Journal of Applied Physics, Vol. 87, No. 10, 15.05.2000, p. 7508-7518.Research output: Contribution to journal › Article
TY - JOUR
T1 - Mechanism of field emission from chemical vapor deposited undoped poly crystalline diamond films
AU - Shim, Jae Yeob
AU - Baik, Hong Koo
AU - Song, Kie Moon
PY - 2000/5/15
Y1 - 2000/5/15
N2 - Field emission characteristics of undoped polycrystalline diamond films with different structural properties have been investigated. By introducing positive bias voltage and/or increasing CH4/H2 ratio, the film quality is significantly deteriorated together with the increase of nondiamond carbon component and the surface morphologies of the films lost their unique facet shape. The reason for the increase of nondiamond carbon content is described in terms of both the increase of substrate temperature and the excessive generation of CHn radicals. It is confirmed that an increase in the nondiamond carbon content markedly enhances field emission properties of diamond films. From the spatial distribution of emission sites, it is suggested that the transport path of field-emitted electrons depends on the nondiamond carbon content: for the film with a large amount of nondiamond carbon, electrons transport preferentially through the conducting mediums such as grain boundaries while for the film with a relatively small amount of nondiamond carbon, electron transport occurs mainly through the diamond surface.
AB - Field emission characteristics of undoped polycrystalline diamond films with different structural properties have been investigated. By introducing positive bias voltage and/or increasing CH4/H2 ratio, the film quality is significantly deteriorated together with the increase of nondiamond carbon component and the surface morphologies of the films lost their unique facet shape. The reason for the increase of nondiamond carbon content is described in terms of both the increase of substrate temperature and the excessive generation of CHn radicals. It is confirmed that an increase in the nondiamond carbon content markedly enhances field emission properties of diamond films. From the spatial distribution of emission sites, it is suggested that the transport path of field-emitted electrons depends on the nondiamond carbon content: for the film with a large amount of nondiamond carbon, electrons transport preferentially through the conducting mediums such as grain boundaries while for the film with a relatively small amount of nondiamond carbon, electron transport occurs mainly through the diamond surface.
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U2 - 10.1063/1.373016
DO - 10.1063/1.373016
M3 - Article
AN - SCOPUS:0001040855
VL - 87
SP - 7508
EP - 7518
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 10
ER -