Applied Physics A

, Volume 113, Issue 3, pp 549–556

Field emission and photoluminescence of ZnO nanocombs

Article

DOI: 10.1007/s00339-013-7867-0

Cite this article as:
Wang, B., Wu, H.Y., Zheng, Z.Q. et al. Appl. Phys. A (2013) 113: 549. doi:10.1007/s00339-013-7867-0

Abstract

Three kinds of new comb-shape nanostructures of ZnO have been grown on single silicon substrates without catalyst-assisted thermal evaporation of Zn and active carbon powders. The morphology and structure of the prepared nanorods are determined on the basis of field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and x-ray diffraction (XRD). The growth mechanism of the ZnO nanocombs can be explained on the basis of the vapor–solid (VS) processes. In nanocombs 1 and nanocombs 2, the comb teeth grow along [0001] and the comb stem grows along [\(01\overline{1}0\)], while in nanocombs 3, nanoteeth grow along [\(01\overline{1}0\)] and stem grows along [0001]. The photoluminescence and field-emission properties of ZnO nanocombs 1–3 have been investigated. The turn-on electric field of ZnO nanocombs 1–3, which is defined as the field required to producing a current density of 10 μA/cm2, is 9, 7.7 and 7.1 V/μm, respectively. The field-emission performance relies not only on the tip’s radius of curvature and field enhancement factor, but also on the factor evaluating the degree of the screening effect.

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Shenzhen Key Lab of Micro-nano Photonic Information Technology, College of Electronic Science and TechnologyShenzhen UniversityShenzhenP.R. China
  2. 2.State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Physics and EngineeringSun Yat-sen UniversityGuangzhouP.R. China

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