Fullerene-coated field emitters activated by a potassium ion flux in high electric fields |
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| Authors: | T. A. Tumareva G. G. Sominski I. A. Svetlov A. N. Morozov |
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| Affiliation: | (1) Alternative Energy Technology Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India;(2) Low Temperature Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India; |
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| Abstract: | Activation of fullerenes covering tip field emitters by a potassium ion flux is studied. New data for the effect of the coating thickness, emitter temperature during coating application, time of ion processing, and ion energy on the activation efficiency are derived. These data are used for optimization of the activation process. The result is a twofold decrease in the voltage necessary to obtain fixed emission currents. The performance of activated emitters in strong electric fields is investigated, and conditions under which the emission current is high are established. It is shown that emitters with a diameter of the top of 0.3 μm can stably operate at emission currents of up to 100 μm A. |
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