| Citation: |
Qin Yuxiang, Hu Ming, Li Haiyan, Zhang Zhisheng, Zou Qiang. Preparation by a Low Temperature Method and the Field Emission Properties of Carbon Nanotube Cold Cathodes[J]. Journal of Semiconductors, 2006, 27(8): 1417-1421.
****
Qin Y X, Hu M, Li H Y, Zhang Z S, Zou Q. Preparation by a Low Temperature Method and the Field Emission Properties of Carbon Nanotube Cold Cathodes[J]. Chin. J. Semicond., 2006, 27(8): 1417.
|
Preparation by a Low Temperature Method and the Field Emission Properties of Carbon Nanotube Cold Cathodes
-
Abstract
We study a new preparation process for carbon nanotube (CNT) cold cathode,making use of the properties of low melting point and high conductivity. In this new process,the traditional organic binder or Ag paste is replaced with Ag nano-particles.A mixture paste of CNT,Ag nano-particles,and other organic solvents is spread on Cu-coated glass substrate.Through the melting and connecting of Ag nano-particles after sintering for 30min at 250℃,a flat CNT film with good field emission performance is obtained.Measurements reveal that the field emission properties are the best when CNT∶Ag mass ratio is 1∶1, with a threshold electric field of 4.9V/μm and an emission current density of 41mA/cm2 at 5.7V/μm. Too many Ag nano-particles in the mixed paste result in a noticeable decrease of the emission current at high voltages because of the coating CNT by the melting of Ag films. On the other hand, poor adhesion to the substrate and electric conductivity of the CNT cathode result when there are too few Ag nano-particles.-
Keywords:
- carbon nanotubes,
- Ag nano-particles,
- field emission,
- preparation
-
References
-
Proportional views
DownLoad: