Publication result 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

English Title

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

Type

Paper in proceedings (conference paper)

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.

English 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

Key words in English

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

Authors

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

RIV year

2025

Released

04.09.2024

Publisher

IEEE

ISBN

979-8-3503-7976-1

Book

2024 37th International Vacuum Nanoelectronics Conference (IVNC)

Pages from

1

Pages to

2

Pages count

2

URL

https://ieeexplore.ieee.org/document/10652268

BibTex

@inproceedings{BUT189289,
  author="Zuzana {Košelová} and Daniel {Burda} and Mohammad Mahmoud Mohammad {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="1--2",
  publisher="IEEE",
  doi="10.1109/IVNC63480.2024.10652268",
  isbn="979-8-3503-7976-1",
  url="https://ieeexplore.ieee.org/document/10652268"
}