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Proceedings Paper

Carrier relaxation and stimulated emission in ZnO nanorods grown by catalyst-assisted vapor transport on various substrates
Author(s): V. Avrutin; Ü. Özgür; N. Izyumskaya; S. Chevtchenko; J. Leach; J. C. Moore; A. A. Baski; C. Litton; H. O. Everitt; K. T. Tsen; M. Abouzaid; P. Ruterana; H. Morkoç
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Paper Abstract

ZnO nanorods were grown by catalyst-assisted vapor phase transport on Si(001), GaN(0001)/c-Al2O3, and bulk ZnO(0001) substrates. Morphology studies as well as X-ray diffraction and transmission electron microscopy showed that ZnO nanorods grew mostly perpendicular to the GaN(0001) and ZnO(0001) substrate surface, whereas a more random directional distribution was found for nanorods on Si(001). Integral optical properties of fabricated nanorods were studied by steady-state photoluminescence and time-resolved photoluminescence. Stimulated emission was observed from ZnO nanorods on GaN(0001)/c-Al2O3 substrates, most likely due to their vertical orientation. Near-field scanning optical microscopy was applied to investigate luminescent properties of individual rods. Raman spectroscopy revealed biaxial compressive strain in the nanorod samples grown on Si(001). Conductive atomic force microscopy showed that nanorods are electrically isolated from each other. I-V spectra of individual nanorods were measured.

Paper Details

Date Published: 20 February 2007
PDF: 7 pages
Proc. SPIE 6474, Zinc Oxide Materials and Devices II, 64741M (20 February 2007); doi: 10.1117/12.708835
Show Author Affiliations
V. Avrutin, Virginia Commonwealth Univ. (United States)
Ü. Özgür, Virginia Commonwealth Univ. (United States)
N. Izyumskaya, Virginia Commonwealth Univ. (United States)
S. Chevtchenko, Virginia Commonwealth Univ. (United States)
J. Leach, Virginia Commonwealth Univ. (United States)
J. C. Moore, Virginia Commonwealth Univ. (United States)
A. A. Baski, Virginia Commonwealth Univ. (United States)
C. Litton, Air Force Research Lab. (United States)
H. O. Everitt, Duke Univ. (United States)
Army Aviation and Missile RDEC (United States)
K. T. Tsen, Arizona State Univ. (United States)
M. Abouzaid, SIFCOM, CNRS, ENSICAEN (France)
P. Ruterana, SIFCOM, CNRS, ENSICAEN (France)
H. Morkoç, Virginia Commonwealth Univ. (United States)


Published in SPIE Proceedings Vol. 6474:
Zinc Oxide Materials and Devices II
Ferechteh Hosseini Teherani; Cole W. Litton, Editor(s)

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