| Citation: |
Zhang Yongai, Wu Chaoxing, Zheng Yong, Guo Tailiang. Synthesis and efficient field emission characteristics of patterned ZnO nanowires[J]. Journal of Semiconductors, 2012, 33(2): 023001. doi: 10.1088/1674-4926/33/2/023001
Zhang Y N G, Wu C X, Zheng Y, Guo T L. Synthesis and efficient field emission characteristics of patterned ZnO nanowires[J]. J. Semicond., 2012, 33(2): 023001. doi: 10.1088/1674-4926/33/2/023001.
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Synthesis and efficient field emission characteristics of patterned ZnO nanowires
doi: 10.1088/1674-4926/33/2/023001
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Abstract
Patterned ZnO nanowires were successfully synthesized on ITO electrodes deposited on the glass substrate by using a simple thermal evaporation approach. The morphology, crystallinity and optical properties of ZnO nanowires were characterized by scanning electron microscopy, X-ray diffraction, energy dispersive X-ray and photoluminescence spectroscopy. Their field emission characteristics were also investigated. SEM images showed that the ZnO nanowires, with a diameter of 100-200 nm and length up to 5 μm, were highly uniform and well distributed on the linear ITO electrodes. The field emission measurement indicated that patterned ZnO nanowire arrays have a turn-on field of 1.6 V/μm at current density of 1 μ A/cm2 and a threshold field of 4.92 V/μ m at current density of 1 mA/cm2 at an emitter-anode gap of 700 μm. The current density rapidly reached 2.26 mA/cm2 at an applied field of 5.38 V/μm. The fluctuation of emission current was lower than 5% for 4.5 h. The low turn-on field, high current density and good stability of patterned ZnO nanowire arrays indicate that it is a promising candidate for field emission application.-
Keywords:
- zinc oxide
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References
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