Intense thermal field electron emission from room-temperature stable electride

Yoshitake Toda, Sung Wng Kim, Katsuro Hayashi, Masahiro Hirano, Toshio Kamiya, Hideo Hosono, Takeshi Haraguchi, Hiroshi Yasuda

Research output: Contribution to journalArticle

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Abstract

Thermal field emission (TFE) from a flat surface of 12CaO·7 Al2 O3 (C12A7) electride was examined at temperatures up to 900 °C and applied external voltages of 0-6 kV in a 10-5 Pa vacuum. TFE started to occur at ∼650 °C and steeply increased at ∼900 °C to reach ∼80 μA (∼1.5 A cm-2) when an extraction field of 105 V cm-1 (an extraction voltage of 6 kV) was applied. The work function estimated from the Richardson-Dushman equation was ∼2.1 eV, which is rather smaller than that of La B6 (∼2.7 eV). It is experimentally confirmed that the emission with a current of ∼50 μA (from a 80 μm diameter area) was stably sustained for more than 90 h. The efficient and stable emission at relatively low temperature in a moderate vacuum atmosphere strongly suggests that the C12A7 electride has high potential for TFE applications.

Original languageEnglish
Article number254103
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number25
DOIs
Publication statusPublished - Dec 27 2005
Externally publishedYes

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thermal emission
electron emission
field emission
Richardson-Dushman equation
room temperature
vacuum
electric potential
flat surfaces
atmospheres
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Toda, Y., Kim, S. W., Hayashi, K., Hirano, M., Kamiya, T., Hosono, H., ... Yasuda, H. (2005). Intense thermal field electron emission from room-temperature stable electride. Applied Physics Letters, 87(25), 1-3. [254103]. https://doi.org/10.1063/1.2149989

Intense thermal field electron emission from room-temperature stable electride. / Toda, Yoshitake; Kim, Sung Wng; Hayashi, Katsuro; Hirano, Masahiro; Kamiya, Toshio; Hosono, Hideo; Haraguchi, Takeshi; Yasuda, Hiroshi.

In: Applied Physics Letters, Vol. 87, No. 25, 254103, 27.12.2005, p. 1-3.

Research output: Contribution to journalArticle

Toda, Y, Kim, SW, Hayashi, K, Hirano, M, Kamiya, T, Hosono, H, Haraguchi, T & Yasuda, H 2005, 'Intense thermal field electron emission from room-temperature stable electride', Applied Physics Letters, vol. 87, no. 25, 254103, pp. 1-3. https://doi.org/10.1063/1.2149989
Toda, Yoshitake ; Kim, Sung Wng ; Hayashi, Katsuro ; Hirano, Masahiro ; Kamiya, Toshio ; Hosono, Hideo ; Haraguchi, Takeshi ; Yasuda, Hiroshi. / Intense thermal field electron emission from room-temperature stable electride. In: Applied Physics Letters. 2005 ; Vol. 87, No. 25. pp. 1-3.
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AU - Hirano, Masahiro

AU - Kamiya, Toshio

AU - Hosono, Hideo

AU - Haraguchi, Takeshi

AU - Yasuda, Hiroshi

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