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Cathodoluminescence of single ZnO nanorod heterostructures

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Authors
Piechal, Bernard; Yoo, Jinkyung; Elshaer, Abdelhamid; Mofor, Augustine Che; Yi, Gyu-Chul; Bakin, Andrey; Waag, Andreas; Donatini, Fabrice; Dang, Le Si
Issue Date
2007-04-02
Publisher
Wiley-Blackwell
Citation
phys. stat. sol. (b) 244, 1458 (2007)
Abstract
Optical properties of ZnO-based single nanorods are probed by cathodoluminescence (CL) measurements at T=5 K. We observe a variation of the ZnO near band edge CL by three orders of magnitude along the nanorod axis, accompanied by a spectral blueshift of 10-30 meV. This indicates a rather poor structural quality of the nanorod bottom part, close to the substrate. ZnO/ZnMgO quantum wells grown on top of ZnO nanorods are found to exhibit much stronger confinement effects as compared to their two-dimensional counterparts, suggesting a reduced spontaneous and piezoelectric polarization effects.
ISSN
0370-1972
Language
English
URI
http://hdl.handle.net/10371/5473
DOI
https://doi.org/10.1002/pssb.200675104
https://doi.org/10.1002/pssb.200675104
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College of Natural Sciences (자연과학대학)Dept. of Physics and Astronomy (물리·천문학부)Physics (물리학전공)Journal Papers (저널논문_물리학전공)
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