Optical and field emission properties in different nanostructures of ZnO

Singh, J., Kumar, P., Late, D. J., Singh, T., More, M. A., Joag, D. S., Tiwari, R. S., Hui, K. S., Hui, K. N. and Srivastava, O. N. (2012) Optical and field emission properties in different nanostructures of ZnO. Digest Journal of Nanomaterials and Biostructures, 7 (2). pp. 795-806. ISSN 1842-3582

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Abstract

ZnO nanostructures with different morphologies e.g. nanotetrapods, nanorods, nanocombs and nanoaeroplanes has been fabricated by evaporation of pure zinc powder without catalysts in the temperature range of 400~900 °C. The structures and properties of obtained products were examined using scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, X-ray diffraction, room temperature photoluminescence and field emission. Photoluminescence spectra showed an ultravoilet-green emission and strong orange-red emission peaks at room temperature. The field emission studies of the as grown nanocombs revealed that threshold field, required to draw a current density of ~1.0 μA/cm2 is ~ 1.4 V/μm. An emission current density of ~9.05 μA/cm2 has been drawn from nanocombs at an applied electric field of ~ 1.92 V/μm. The field enhancement factor found to be ~8050, indicating that the electron emission from nanometric dimension of the emitter. Such, ZnO nanostructures are likely to be candidates as building blocks for constructing photonic and flat panel display.

Item Type: Article
Uncontrolled Keywords: current stability,field emission,nanocombs,nanowires,zno
Faculty \ School: Faculty of Science > School of Mathematics
Related URLs:
Depositing User: Pure Connector
Date Deposited: 04 Oct 2016 12:02
Last Modified: 22 Apr 2020 01:47
URI: https://ueaeprints.uea.ac.uk/id/eprint/60697
DOI:

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