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Optimization of field emission properties from multi-walled carbon nanotubes using ceramic fillers

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Abstract

The field emission properties of multi-walled carbon nanotubes were examined using a screen-printed thick film with a diode-type configuration in a vacuum. The effects of various concentrations of two different ceramic fillers, indium tin oxide (ITO) powder and a glass frit, on the emission current density and turn-on field were evaluated. The emission properties of both pastes were dependent on the amount of filler. Considerably enhanced emission properties were obtained with the paste containing 5–10 wt.% of either ITO or the glass frit compared with those without a filler. The paste containing the ceramic filler showed enhanced emission properties compared with that containing the 5 wt.% Ag conventionally used, which confirmed the importance of the filler. The paste containing 10 wt.% ITO represented an emission current density of 176.4 μA/cm2 at 5 V/μA, a turn-on field of 1.87 V/μA for an emission current density of 1 μA/cm2 and a field enhancement factor of 7580. The paste formulation was also found to be suitable for fine patterning using UV-lithography techniques. A long-term stability test for 110 h of a paste containing 10 wt.% ITO revealed a half-life of approximately 30000 h, which is appropriate for commercial applications.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Yeungnam University, 712-749, Gyeongsan, Korea

    Jong-Hyun Lee, Parlindungan Yonathan, Hyun-Tae Kim & Dang-Hyok Yoon

  2. Electric Material Development Team, Corporate R&D Center, Samsung SDI, 449-577, Yong-in, Korea

    Jaemyung Kim

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  1. Jong-Hyun Lee
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  2. Parlindungan Yonathan
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  3. Hyun-Tae Kim
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  4. Dang-Hyok Yoon
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  5. Jaemyung Kim
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Correspondence to Dang-Hyok Yoon.

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Lee, JH., Yonathan, P., Kim, HT. et al. Optimization of field emission properties from multi-walled carbon nanotubes using ceramic fillers. Appl. Phys. A 93, 511–516 (2008). https://doi.org/10.1007/s00339-008-4797-3

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  • DOI: https://doi.org/10.1007/s00339-008-4797-3

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