Publication detail

From deformation to performance: WO3-coated tungsten emitters created by anodization

KOŠELOVÁ, Z. BURDA, D. ALLAHAM, M. FOHLEROVÁ, Z. KNÁPEK, A.

Original Title

From deformation to performance: WO3-coated tungsten emitters created by anodization

Type

conference paper

Language

English

Original Abstract

This study investigates the field emission characteristics of tungsten single-tip field emitters coated with a thin tungsten trioxide (WO3) layer. The WO3 dielectric barrier at the metal-vacuum interface aims to enhance performance by extending operational lifespan and increasing current levels. High-voltage applications risk deforming the emitter tip due to phase transitions to plasma. However, altered tip shapes, formed from evaporation may provide stability and performance benefits. Our results show that emitters with thicker oxide layers after deformation can exhibit stable emission characteristics and higher voltage thresholds, suggesting that oxide-coated tungsten tips can enhance cold field emission properties.

Keywords

Tungsten emitters, cold field emission, FEM analysis, oxide coating, dielectric barrier

Authors

KOŠELOVÁ, Z.; BURDA, D.; ALLAHAM, M.; FOHLEROVÁ, Z.; KNÁPEK, A.

Released

15. 7. 2024

Publisher

IEEE

ISBN

979-8-3503-7975-4

Book

2024 37th International Vacuum Nanoelectronics Conference (IVNC)

Pages from

79

Pages to

80

Pages count

182

BibTex

@inproceedings{BUT189289,
  author="Zuzana {Košelová} and Daniel {Burda} and Mohammad Mahmoud {Allaham} and Zdenka {Fohlerová} and Alexandr {Knápek}",
  title="From deformation to performance: WO3-coated tungsten emitters created by anodization",
  booktitle="2024 37th International Vacuum Nanoelectronics Conference (IVNC)",
  year="2024",
  pages="79--80",
  publisher="IEEE",
  isbn="979-8-3503-7975-4"
}