College of Physics and Information Engineering, Fuzhou University, Fuzhou 350002, China
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DOI:
10.7502/j.issn.1674-3962.2014.03.04
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Abstract:
Surface-conducted field emission devices based on tetrapod-like zinc oxide (T-ZnO) emitter have been successfully fabricated by screen-printing, and the field emission properties were investigated. The scanning electron microscope images showed that the as-synthesized T-ZnO deposited uniformly in the gap between cathode and gate electrode forming conducting layer. The field emission measurement results showed that with the increases of anode voltage, anode current of the device became larger, while turn-on voltage became smaller. The turn-on voltage was 70V when the anode voltage was set to 2400V. The maximum brightness of the device reached 550 cd/m2 when the gate voltage was 120V. A measurement of the emission stability was carried out, and the emission current fluctuation was smaller than 4% during the 450min, which indicated that the field emission device had a good field emission stability.