Abstract
Nitrogen-doped diamond films were successfully synthesized using a urea/methanol saturated solution as a nitrogen source. Scanning electron microscopy (SEM) and Raman spectroscopy revealed that the morphology and quality of the diamond films were not altered due to nitrogen doping. However, increasing the urea/methanol ratio in gas mixture markedly influences the field emission properties of diamond films, which were optimized when the films were grown using H2/CH4/urea = 300:18:6 sccm. The electron field emission of the films can be turned on at a low field as 5.0 V μm-1 and the emission current density as large as Jc = 1019 μA cm-2 can be attained at 21.6 V μm-1 applied field. The effective work function is φe = 0.034 eV.
Original language | English |
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Pages (from-to) | 1591-1599 |
Number of pages | 9 |
Journal | Diamond and Related Materials |
Volume | 9 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2000 |
Event | 5th International Conference on Advanced Materials - Beijing, China Duration: 1999 Jun 13 → 1999 Jun 18 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- General Chemistry
- Mechanical Engineering
- Materials Chemistry
- Electrical and Electronic Engineering