Abstract
The effect of nanoparticle fillers on the field electron emission properties of CNT paste emitters was investigated. Several nanoparticle fillers such as graphite, SiC, TiC, and Ni nanoparticles were used for fabricating the CNT paste emitters. By adding other nanoparticles like SiC, TiC or Ni nanoparticles to the graphite nanoparticle, the CNT paste emitter shows improved field electron emission properties. Especially, the CNT paste emitter made with the combination of graphite, TiC, and Ni nanoparticles exhibits the best field electron emission performance with a low turn-on electric field of 1.75 V/μm, a low threshold electric field of 2.12 V/μm, and a high emission current density of 1218.28 mA/cm2 at an applied electric field of 4.6 V/μm. It also presents good field electron emission stability with a small degradation rate of 10.68% and a small fluctuation rate of ±0.54% over 20 h. The result is caused by the increased electron emission sites of the CNT paste emitter, increased electrical conductivity of the CNT paste emitter, and decreased contact resistance between the CNT paste emitter and the Kovar substrate.
| Original language | English |
|---|---|
| Pages (from-to) | 2690-2699 |
| Number of pages | 10 |
| Journal | ACS Applied Electronic Materials |
| Volume | 6 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2024 Apr 23 |
Bibliographical note
Publisher Copyright:© 2024 American Chemical Society
Keywords
- Carbon nanotube paste emitter
- contact resistance
- electrical conductivity
- field electron emission
- graphite nanoparticles
- high current density
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Electrochemistry