Electronic structure and field emission properties of in situ potassium-doped single-walled carbon nanotubes

Byeongchul Ha; Cheol Jin Lee

doi:10.1063/1.2431463

Electronic structure and field emission properties of in situ potassium-doped single-walled carbon nanotubes

Byeongchul Ha, Cheol Jin Lee

School of Electrical Engineering

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

34 Citations (Scopus)

Abstract

In situ potassium (K)-doped single-walled carbon nanotube (SWCNT) was synthesized using a hydrogen arc-discharge method. X-ray photoelectron spectroscopy analysis showed that the K-doped SWCNTs consisted of 0.12% K mass composition. The K-doped SWCNTs showed the lower turn-on electric field of 2.0 Vμm at a current density of 10-9 A cm2 and the higher emission current density of 3.0 mA cm2 at an applied field of 4.6 Vμm compared with the undoped SWCNTs. The improved field emission performance of K-doped SWCNTs was mainly attributed to the decreased work function and the increased density of state near the Fermi energy.

Original language	English
Article number	023108
Journal	Applied Physics Letters
Volume	90
Issue number	2
DOIs	https://doi.org/10.1063/1.2431463
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Electronic structure and field emission properties of in situ potassium-doped single-walled carbon nanotubes",

abstract = "In situ potassium (K)-doped single-walled carbon nanotube (SWCNT) was synthesized using a hydrogen arc-discharge method. X-ray photoelectron spectroscopy analysis showed that the K-doped SWCNTs consisted of 0.12% K mass composition. The K-doped SWCNTs showed the lower turn-on electric field of 2.0 Vμm at a current density of 10-9 A cm2 and the higher emission current density of 3.0 mA cm2 at an applied field of 4.6 Vμm compared with the undoped SWCNTs. The improved field emission performance of K-doped SWCNTs was mainly attributed to the decreased work function and the increased density of state near the Fermi energy.",

author = "Byeongchul Ha and Lee, {Cheol Jin}",

note = "Funding Information: This work was supported by the Center for Nanotubes and Nanostructured Composites at Sungkyunkwan University and by the National R&D project for Nano Science and Technology and by the Ministry of Commerce, Industry, and Energy of Korea through a components and Materials Technology Development Project (No. 0401-DD2-0162), and by the research fund of Korea University.",

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AU - Ha, Byeongchul

AU - Lee, Cheol Jin

N1 - Funding Information: This work was supported by the Center for Nanotubes and Nanostructured Composites at Sungkyunkwan University and by the National R&D project for Nano Science and Technology and by the Ministry of Commerce, Industry, and Energy of Korea through a components and Materials Technology Development Project (No. 0401-DD2-0162), and by the research fund of Korea University.

PY - 2007

Y1 - 2007

N2 - In situ potassium (K)-doped single-walled carbon nanotube (SWCNT) was synthesized using a hydrogen arc-discharge method. X-ray photoelectron spectroscopy analysis showed that the K-doped SWCNTs consisted of 0.12% K mass composition. The K-doped SWCNTs showed the lower turn-on electric field of 2.0 Vμm at a current density of 10-9 A cm2 and the higher emission current density of 3.0 mA cm2 at an applied field of 4.6 Vμm compared with the undoped SWCNTs. The improved field emission performance of K-doped SWCNTs was mainly attributed to the decreased work function and the increased density of state near the Fermi energy.

AB - In situ potassium (K)-doped single-walled carbon nanotube (SWCNT) was synthesized using a hydrogen arc-discharge method. X-ray photoelectron spectroscopy analysis showed that the K-doped SWCNTs consisted of 0.12% K mass composition. The K-doped SWCNTs showed the lower turn-on electric field of 2.0 Vμm at a current density of 10-9 A cm2 and the higher emission current density of 3.0 mA cm2 at an applied field of 4.6 Vμm compared with the undoped SWCNTs. The improved field emission performance of K-doped SWCNTs was mainly attributed to the decreased work function and the increased density of state near the Fermi energy.

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Electronic structure and field emission properties of in situ potassium-doped single-walled carbon nanotubes

Abstract

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