Influence of adsorbates on the performance of a field emitter array in a high voltage triode setup

In the present work, black-silicon field emitter arrays (FEAs) are investigated regarding the influence of residual gas pressure on the characteristics and lifetime in the high voltage triode setup. Current-voltage-characteristics at different pressure levels are recorded and show a decreasing emiss...

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Bibliographic Details
Published in:Journal of applied physics 2017-09, Vol.122 (12)
Main Authors: Edler, Simon, Bachmann, Michael, Breuer, Janis, Dams, Florian, Düsberg, Felix, Hofmann, Martin, Jakšič, Jasna, Pahlke, Andreas, Langer, Christoph, Ławrowski, Robert, Prommesberger, Christian, Schreiner, Rupert
Format: Article
Language:English
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Summary:In the present work, black-silicon field emitter arrays (FEAs) are investigated regarding the influence of residual gas pressure on the characteristics and lifetime in the high voltage triode setup. Current-voltage-characteristics at different pressure levels are recorded and show a decreasing emission current with rising pressure. This decrease can be explained by an increase of the work function and charging of the emitter surface caused by adsorbates. The emission current can be restored to its initial value by heating of the FEA up to 110 °C during active emission. With this regeneration procedure, an extended lifetime from about 20 h to 440 h at a residual gas pressure of 10−5 mbar is achieved.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4987134