Details

Autor(en) / Beteiligte

• Chen, Y. P.
• Zheng, C. H.

Titel

Optimized Growth of Tetra-Needlelike ZnO Whiskers in the Atmosphere for Field-Emission Digital Tube Application

Ist Teil von

• IEEE electron device letters, 2016-04, Vol.37 (4), p.504-507

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2016

Quelle

IEEE Xplore

Beschreibungen/Notizen

• Tetra-needlelike ZnO (T-ZnO) whiskers were directly synthesized by thermal oxidation in the atmosphere. The issue of large variations in morphology, purity, and field-emission performance was found to be greatly relieved through the optimization of the growth temperature, to balance the effects of increasing saturated vapor pressure (P s ) of zinc and decreasing oxygen content (n O2 ) with increasing temperature. The T-ZnO whiskers grown at 1000 °C exhibited uniform morphology, a low turn-ON electric field of 3.2 V/μm , a large field enhancement factor of 7122, and better field-emission stability than whiskers grown at other temperatures, so as to be suitable for application as field emitters. Using the optimized growth process, we fabricated a seven-segment field-emission digital tube which dynamically displayed the numbers 0-9 under the control of a driving circuit.