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Activation of fullerene coatings on field emitters by potassium atom and ion fluxes

  • Surface, Electron and Ion Emission
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Abstract

The activation of tip field emitters with a fullerene coating by the atomic and ionic fluxes of potassium is studied. The deposition of atomic potassium decreases characteristic voltage U 1 generating fixed fieldemission current I by a factor of 3.5–4.0. However, field emitters activated by potassium atoms are rapidly deactivated and the resulting decrease in U 1 after storage in a vacuum does not exceed 25–30%. A stable approximately twofold decrease in the characteristic voltage can be reached if the fullerene coating is exposed to a potassium ion flux. The enhanced efficiency of emitter activation by a potassium ion flux is explained by the formation of KC 60 endohedral and/or C60 K exohedral molecules in the fullerene coating.

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Authors and Affiliations

  1. St. Petersburg State Technical University, ul. Politekhnicheskaya 29, St. Petersburg, 195251, Russia

    T. A. Tumareva, G. G. Sominskii, A. K. Bondarenko, A. A. Veselov & I. A. Svetlov

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  1. T. A. Tumareva
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  2. G. G. Sominskii
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  3. A. K. Bondarenko
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  4. A. A. Veselov
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  5. I. A. Svetlov
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Original Russian Text © T.A. Tumareva, G.G. Sominskii, A.K. Bondarenko, A.A. Veselov, I.A. Svetlov, 2006, published in Zhurnal Tekhnicheskoĭ Fiziki, 2006, Vol. 76, No. 7, pp. 81–84.

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Tumareva, T.A., Sominskii, G.G., Bondarenko, A.K. et al. Activation of fullerene coatings on field emitters by potassium atom and ion fluxes. Tech. Phys. 51, 898–901 (2006). https://doi.org/10.1134/S1063784206070140

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  • DOI: https://doi.org/10.1134/S1063784206070140

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