Enhanced low-temperature thermionic field emission from surface-treated N-doped diamond films

F. A.M. Köck; J. M. Garguilo; Billyde Brown; R. J. Nemanich

doi:10.1016/S0925-9635(02)00006-7

Enhanced low-temperature thermionic field emission from surface-treated N-doped diamond films

F. A.M. Köck, J. M. Garguilo, Billyde Brown, R. J. Nemanich

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

Nitrogen-doped diamond films have been synthesized for application as a low-temperature thermionic field-emission cathode. The critical result of this study is the observation of uniform electron emission from UV photo-excitation and from thermionic field emission for films terminated with hydrogen or a 0.3-nm Ti layer. The samples were imaged with photoelectron emission microscopy (PEEM) and thermionic field-emission electron microscopy (T-FEEM) at temperatures up to 900 °C, and the electron emission current was recorded vs. the applied voltage. Hydrogen-passivated films show enhanced electron emission, but become unstable at elevated temperatures, while Ti-terminated films showed similar enhanced emission at temperatures up to 950 °C. Temperature-dependent I/V measurements show strongly increased electron emission at higher temperatures, suggesting that electron emission originates from the conduction band. These results indicate a promising new material for the production of low-temperature, high-brightness electron sources.

Original language	English (US)
Pages (from-to)	774-779
Number of pages	6
Journal	Diamond and Related Materials
Volume	11
Issue number	3-6
DOIs	https://doi.org/10.1016/S0925-9635(02)00006-7
State	Published - Mar 2002
Externally published	Yes

Keywords

Chemical vapor deposition (CVD)
Diamond
Field emission

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Chemistry(all)
Mechanical Engineering
Materials Chemistry
Electrical and Electronic Engineering

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10.1016/S0925-9635(02)00006-7

Cite this

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title = "Enhanced low-temperature thermionic field emission from surface-treated N-doped diamond films",

abstract = "Nitrogen-doped diamond films have been synthesized for application as a low-temperature thermionic field-emission cathode. The critical result of this study is the observation of uniform electron emission from UV photo-excitation and from thermionic field emission for films terminated with hydrogen or a 0.3-nm Ti layer. The samples were imaged with photoelectron emission microscopy (PEEM) and thermionic field-emission electron microscopy (T-FEEM) at temperatures up to 900 °C, and the electron emission current was recorded vs. the applied voltage. Hydrogen-passivated films show enhanced electron emission, but become unstable at elevated temperatures, while Ti-terminated films showed similar enhanced emission at temperatures up to 950 °C. Temperature-dependent I/V measurements show strongly increased electron emission at higher temperatures, suggesting that electron emission originates from the conduction band. These results indicate a promising new material for the production of low-temperature, high-brightness electron sources.",

keywords = "Chemical vapor deposition (CVD), Diamond, Field emission",

author = "K{\"o}ck, {F. A.M.} and Garguilo, {J. M.} and Billyde Brown and Nemanich, {R. J.}",

note = "Funding Information: We gratefully acknowledge the Duke University Free Electron Laser Laboratory, where all electron emission microscopy experiments were performed. This research was supported through the Frontier Carbon Technology Project, the Japan Fine Ceramics Center, ONR and PTS Company–John Driscoll.",

year = "2002",

month = mar,

doi = "10.1016/S0925-9635(02)00006-7",

language = "English (US)",

volume = "11",

pages = "774--779",

journal = "Diamond and Related Materials",

issn = "0925-9635",

publisher = "Elsevier BV",

number = "3-6",

}

TY - JOUR

T1 - Enhanced low-temperature thermionic field emission from surface-treated N-doped diamond films

AU - Köck, F. A.M.

AU - Garguilo, J. M.

AU - Brown, Billyde

AU - Nemanich, R. J.

N1 - Funding Information: We gratefully acknowledge the Duke University Free Electron Laser Laboratory, where all electron emission microscopy experiments were performed. This research was supported through the Frontier Carbon Technology Project, the Japan Fine Ceramics Center, ONR and PTS Company–John Driscoll.

PY - 2002/3

Y1 - 2002/3

N2 - Nitrogen-doped diamond films have been synthesized for application as a low-temperature thermionic field-emission cathode. The critical result of this study is the observation of uniform electron emission from UV photo-excitation and from thermionic field emission for films terminated with hydrogen or a 0.3-nm Ti layer. The samples were imaged with photoelectron emission microscopy (PEEM) and thermionic field-emission electron microscopy (T-FEEM) at temperatures up to 900 °C, and the electron emission current was recorded vs. the applied voltage. Hydrogen-passivated films show enhanced electron emission, but become unstable at elevated temperatures, while Ti-terminated films showed similar enhanced emission at temperatures up to 950 °C. Temperature-dependent I/V measurements show strongly increased electron emission at higher temperatures, suggesting that electron emission originates from the conduction band. These results indicate a promising new material for the production of low-temperature, high-brightness electron sources.

AB - Nitrogen-doped diamond films have been synthesized for application as a low-temperature thermionic field-emission cathode. The critical result of this study is the observation of uniform electron emission from UV photo-excitation and from thermionic field emission for films terminated with hydrogen or a 0.3-nm Ti layer. The samples were imaged with photoelectron emission microscopy (PEEM) and thermionic field-emission electron microscopy (T-FEEM) at temperatures up to 900 °C, and the electron emission current was recorded vs. the applied voltage. Hydrogen-passivated films show enhanced electron emission, but become unstable at elevated temperatures, while Ti-terminated films showed similar enhanced emission at temperatures up to 950 °C. Temperature-dependent I/V measurements show strongly increased electron emission at higher temperatures, suggesting that electron emission originates from the conduction band. These results indicate a promising new material for the production of low-temperature, high-brightness electron sources.

KW - Chemical vapor deposition (CVD)

KW - Diamond

KW - Field emission

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U2 - 10.1016/S0925-9635(02)00006-7

DO - 10.1016/S0925-9635(02)00006-7

M3 - Article

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SN - 0925-9635

VL - 11

SP - 774

EP - 779

JO - Diamond and Related Materials

JF - Diamond and Related Materials

IS - 3-6

ER -

Enhanced low-temperature thermionic field emission from surface-treated N-doped diamond films

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Keywords

ASJC Scopus subject areas

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