2009•Journal of Functional BiomaterialsOpen access
The effect of field emission properties of carbon nanotube cathodes on different substrates
Guo Tai-liang
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Abstract
The effect of field emission properties of carbon nanotube (CNT) cathodes on CrCuCr thin-film,indium tin oxides (ITO) transparent-film and silver (Ag) paste thick-film were investigated,which prepared by screen-printing,sintered with high temperature. The morphologies of CNT cathodes on different electrode substrates were observed by scanning electron mircroscope (SEM),and the field emission properties were characterized in the same condition of 1.33×10-5Pa. The results showed that three kinds of CNT cathodes have different field emission properties. The field emission tests indicate that the turn on electric field of the CNT cathode on CrCuCr thin-film is 0.99V/mm,the one on ITO thin-film’s 2.05V/mm,the one on Ag paste thick-film’s 2.46V/mm. When the electric field is 3.0V/μm,the brightness luminosities of CrCuCr-cathode,ITO-cathode and Ag paste-cathode were 2472,1889,587cd/m2,respectively. It can be speculated that the field emission property of the CNT cathode on CrCuCr thin-film takes precedence over the others,and the one on Ag paste thick-film is lousiest.