Improvement of Turn-On Voltage by Thermal Annealing of a Tungsten Single Emitter Coated with a Carbonaceous Film Deposited in Liquid Methanol

Tomomi YOSHIMOTO  Tatsuo IWATA  

IEICE TRANSACTIONS on Electronics   Vol.E94-C   No.12   pp.1913-1916
Publication Date: 2011/12/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Semiconductor Materials and Devices
field emission,  carbonaceous film,  DLC,  electrochemical deposition,  annealing,  

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A carbonaceous thin film was deposited on a tungsten single emitter by electrolysis of liquid methanol. The carbonaceous single emitter was thermally treated under vacuum conditions, and changes in its field emission characteristics were examined. The field emission characteristics obeyed the Fowler–Nordheim relationship for all annealing temperatures. The turn-on voltage decreased from 1640 V to 790 V with annealing up to 1373 K.