Efficient field emission from single crystalline indium oxide pyramids

Jia, Hongbo; Zhang, Ye; Chen, Xihong; Shu, Jing; Luo, Xuhui; Zhang, Zhensheng; Yu, Dapeng
June 2003
Applied Physics Letters;6/9/2003, Vol. 82 Issue 23, p4146
Academic Journal
Well-aligned indium oxide pyramids were synthesized on a Ni-coated silicon (100) substrate by a chemical vapor deposition. Scanning electron microscopy and x-ray diffraction investigations show that these pyramids present a tetragonal morphology and single-crystalline cubic bixbyite structure. The size control of the pyramids was achieved by varying the growth temperature. Field-emission characteristics of the as-grown indium oxide pyramids were measured. The field-emission current density of the nanopyramids (average size: ∼ 180 nm) reached about 1 mA/cm[SUP2] at a threshold field of about 6.0 V/μm, which is comparable to that of carbon nanotubes, and can guarantee sufficient luminescence brightness in a flat panel display.


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