ZHAI Chun-xue, ZHANG Zhi-yong, WANG Xue-wen, ZHAO Wu. Influence of Thermal Annealing on Field Emission of Nano-diamond Coating[J]. Chinese Journal of Luminescence, 2008,29(2): 387-392
ZHAI Chun-xue, ZHANG Zhi-yong, WANG Xue-wen, ZHAO Wu. Influence of Thermal Annealing on Field Emission of Nano-diamond Coating[J]. Chinese Journal of Luminescence, 2008,29(2): 387-392DOI:
Influence of Thermal Annealing on Field Emission of Nano-diamond Coating
The fabricating processes of diamond-based field emission cathode mainly include two modes:growing film and fabricating micro tips or micro-patterned emitters. Growing film is time-consuming and ineffective; micro pattern fabricating is cost-consuming and complicated. Both processes are not adapted to commercial application of large screen field emission displays. The third process was supposed in this paper:coating nano-diamond powders on titanium substrate by spin-coating method. Ohmic contact between diamond coating and Ti substrate could be formed after thermal annealing at proper temperature
which supplies electrons for nano-diamond particles located in coating surface and make them effective emitters. Atomic force microscopy(AFM)
scanning electron microscopy(SEM)
X-ray diffraction(XRD)and Raman spectroscopy were employed to study the influence of the annealing temperature on bonding effect and field emission properties. Thermal treatment at extreme low or high temperature is not benefit to improve the field emission properties of the samples
while the ones annealed at about 700℃ could gain better bonding state.The samples with different coating thickness were annealed at 700℃ to investigate the effect of the coating thickness on the field emission property. Taking the electron transport and diamond emitter number into considerations
neither the excessive thick nor thin coating is good for amelioration of the emission property. Annealed at 700℃
the sample with nine-layer coating presents better property. The threshold electric field of the sample is 4.6 V/μm
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