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Effects of Cu diffusion-doping on structural, optical and magnetic properties of ZnO nanorod arrays grown by VPT

Yilmaz, S., McGlynn, Enda orcid logoORCID: 0000-0002-3412-9035, Bacaksiz, E., Özcan, Ş., Byrne, Daragh orcid logoORCID: 0000-0002-2040-9765, Henry, Martin O. and Chellappan, R.K. (2012) Effects of Cu diffusion-doping on structural, optical and magnetic properties of ZnO nanorod arrays grown by VPT. Journal of Applied Physics, 111 . 013903-013903. ISSN 0021-8979

Abstract
Well-aligned ZnO nanorods were prepared by the vapor phase transport method on Si covered with a ZnO buffer layer. After the nanostructure growth, Cu was doped into the ZnO nanorods by diffusion at three different temperatures and for different times. Undoped and Cu diffusion-doped ZnO samples are highly textured, with the c axis of the wurtzite structure along the growth direction. The incorporation of Cu caused some slight changes in the nanorod alignment, although the wurtzite crystal structure was maintained. X-ray photoelectron spectroscopy measurements revealed that Cu ions were in a divalent state and substituted for the Zn2+ ions of the ZnO matrix. Photoluminescence results at 10 K indicate that the incorporation of copper leads to a relative increase of Cu-related structured green band deep level intensity. Magnetic measurements revealed that both undoped and Cu diffusion-doped ZnO samples exhibited room temperature ferromagnetism. It was also found that bound magnetic polarons play an important role in the appearance of room temperature ferromagnetism in Cu diffusion-doped ZnO nanorods.
Metadata
Item Type:Article (Published)
Refereed:Yes
Subjects:Engineering > Materials
Physical Sciences > Nanotechnology
Physical Sciences > Semiconductors
DCU Faculties and Centres:Research Initiatives and Centres > National Centre for Plasma Science and Technology (NCPST)
DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:American Institute of Physics
Official URL:http://dx.doi.org/10.1063/1.3673861
Copyright Information:© 2012 AIP
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:19626
Deposited On:08 Nov 2013 10:56 by Enda Mcglynn . Last Modified 04 Oct 2018 12:24
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