Structural, morphological, optical and electrical properties of Schottky diodes based on CBD deposited ZnO : Cu nanorods

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dc.contributor.author Mwankemwa, Benard S.
dc.contributor.author Legodi, M.J. (Matshisa Johannes)
dc.contributor.author Mlambo, Mbuso
dc.contributor.author Nel, Jackie M. (Jacqueline Margot)
dc.contributor.author Diale, M. (Mmantsae Moche)
dc.date.accessioned 2017-05-02T12:14:08Z
dc.date.issued 2017-07
dc.description.abstract Undoped and copper doped zinc oxide (ZnO) nanorods have been synthesized by a simple chemical bath deposition (CBD) method at a temperature of 90 C. Structural, morphological, optical and electrical properties of the synthesized ZnO nanorods were found to be dependent on the Cu doping percentage. X-ray diffraction (XRD) patterns revealed strong diffraction peaks of hexagonal wurtzite of ZnO, and no impurity phases from metallic zinc or copper. Scanning electron microscopy (SEM) images showed changes in diameter and shape of nanorods, where by those doped with 2 at.% and 3 at.% aggregated and became compact. Selected area electron diffraction (SAED) patterns indicates high quality, single crystalline wurtzite structure ZnO and intensities of bright spots varied with copper doping concentration. UVevisible absorption peaks of ZnO red shifted with increasing copper doping concentration. Raman studies demonstrated among others, strong and sharp E2 (low) and E2 (high) optical phonon peaks confirming crystal structure of ZnO. Current-voltage measurements based on the gold/ZnO nanorods/ITO showed good rectifying behavior of the Schottky diode. The predicted Schottky barrier height of 0.60 eV was obtained which is not far from the theoretical Schottky-Mott value of 0.80 eV en_ZA
dc.description.department Physics en_ZA
dc.description.embargo 2018-07-31
dc.description.librarian hb2017 en_ZA
dc.description.sponsorship The University of Pretoria and National Research Foundation (NRF), South Africa, Grant No: 91550 and 94166. en_ZA
dc.description.uri http:// www.elsevier.com/locate/superlattices en_ZA
dc.identifier.citation Mwankemwa, BS, Legodi, MJ, Mlambo, M, Nel, JM & Diale, M 2017, 'Structural, Morphological, Optical and Electrical properties of Schottky diodes based on CBD deposited ZnO : Cu Nanorods', Superlattices and Microstructures, vol. 107, pp. 163-171. en_ZA
dc.identifier.issn 0749-6036
dc.identifier.other 10.1016/j.spmi.2017.04.018
dc.identifier.uri http://hdl.handle.net/2263/60159
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2017 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Superlattices and Microstructures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Superlattices and Microstructures, vol. 107, pp. 163-171, 2017. doi : 10.1016/j.spmi.2017.04.018. en_ZA
dc.subject Structural properties en_ZA
dc.subject Electron microscopy en_ZA
dc.subject Electrical properties en_ZA
dc.subject Zinc oxide (ZnO) en_ZA
dc.subject Chemical bath deposition (CBD) en_ZA
dc.subject X-ray diffraction (XRD) en_ZA
dc.subject Scanning electron microscopy (SEM) en_ZA
dc.subject Selected area electron diffraction (SAED) en_ZA
dc.title Structural, morphological, optical and electrical properties of Schottky diodes based on CBD deposited ZnO : Cu nanorods en_ZA
dc.type Postprint Article en_ZA


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