Title :
Field Emitters with Low Turn On Electric Field Based on Carbon Fibres
Author :
Wang, Qilong ; Mu, Hui ; Zhang, Xiaobing ; Lei, Wei ; Wang, Jinchan ; Zhao, Hongping ; Huang, Chengxian ; Wang, Yuchun
Author_Institution :
Dept. of Biomed. Eng., Southeast Univ.
Abstract :
This paper reports the development and the operation of field emitters with low turn on electric field based on carbon fibres. Field emitters of vertical carbon fibres on silicon substrate were fabricated by the catalyst chemical vapor deposition. The diameter of the fibres is about 3~4 mum and the height is larger than 1 mm. After one aging process of 150 minutes, field emission measurements of carbon fibres were carried out in a vacuum chamber with pressure of 5.0times10-4 Pa. The experimental results showed the turn on electric field is 1.5V/mum and the emission current density rises to 46.7mA/cm2 under the field of 2.8 V/mum. The field emission performance and stability of carbon fibres depends strongly on the vacuum level during the process of the experiments. Damages on carbon fibres were also observed because of ion bombardment
Keywords :
carbon fibres; chemical vapour deposition; field emission; silicon; 150 min; aging process; chemical vapor deposition; emission stability; field emitters; ion bombardment; silicon substrate; turn on electric field; vacuum chamber; vertical carbon fibres; Aging; Carbon dioxide; Chemical vapor deposition; Current density; Current measurement; Density measurement; Electric variables measurement; Pressure measurement; Silicon; Stability; CVD; Carbon fibres; Cold cathode; Field emission;
Conference_Titel :
Vacuum Electronics Conference, 2006 held Jointly with 2006 IEEE International Vacuum Electron Sources., IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
1-4244-0108-9
DOI :
10.1109/IVELEC.2006.1666320
