Title :
Effect of outgassing on the field emission property of screen-printed CNTs
Author :
Yunkang Cui ; Xiaobing Zhang ; Wei Lei ; Yunsong Di ; Jing Chen ; Qilong Wang
Author_Institution :
Dept. of Basic Courses, Nanjing Inst. of Technol., Nanjing, China
Abstract :
To study the mechanism of current degradation of a cold cathode, the outgassing measurement of a field emission diode with screen-printed CNTs cathode has been taken with a quadrupole mass spectrometer (QMS) in an ultra-high vacuum (UHV) system. It was found that the H2, CO2, and CO were outgassed from the diode during the working process. The field emission properties of the cold cathode, such as turn-on field, threshold field and the emission current density, were largely related to the pressure of the outgases. From the outgassing experimental results, the relations between the emission current degradation and the outgassing of field emission devices have been found.
Keywords :
carbon compounds; carbon nanotubes; cathodes; current density; diodes; hydrogen; mass spectrometers; outgassing; CO2; H2; QMS; UHV system; carbon nanotubes; cold cathode; emission current degradation mechanism; emission current density; field emission device outgassing; field emission diode; field emission property; outgassing effect; outgassing measurement; quadrupole mass spectrometer; screen-printed CNT cathode; threshold field; turn-on field; ultrahigh vacuum system; working process; Carbon nanotubes; Cathodes; Current density; Degradation; Educational institutions; Scanning electron microscopy; Field emission property; Outgassing characteristics; printed CNTs cathode;
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2012 IEEE Ninth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0368-2
DOI :
10.1109/IVESC.2012.6264209
