Title :
High-current edge emission source from aligned graphene
Author :
Jianlong Liu ; Nannan Li ; Baoqing Zeng
Author_Institution :
Nat. Lab. for Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Graphene sheet with high enhancement factor and low emission field were exfoliated from carbon fibers in carbon cloth. It was a new concept that kept the graphene sheets stay on the carbon fiber and were used, in situ, as emitters. Due to their high multistage enhancement factor and intrinsic low contact resistance, electron emission from these graphene required a low emission field. The threshold-field corresponding to emission current density of 1mA/cm2 was about 0.7V/μm. This high enhancement factor was attributed to the effects of the high aspect ratio of graphene sheets and the geometry of carbon cloth.
Keywords :
carbon fibres; contact resistance; current density; electron field emission; graphene; aligned graphene; carbon cloth; carbon fibers; electron emission; emission current density; graphene sheet; high aspect ratio; high multistage enhancement factor; high-current edge emission source; intrinsic low contact resistance; low emission field; threshold-field; Annealing; Anodes; Carbon dioxide; Chemicals; Graphene; Optical fiber devices; carbon fiber; field emission; graphene; low field;
Conference_Titel :
Vacuum Nanoelectronics Conference (IVNC), 2013 26th International
Conference_Location :
Roanoke, VA
DOI :
10.1109/IVNC.2013.6624745
