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Title: ZnCdO/ZnO coaxial multiple quantum well nanowire heterostructures and optical properties
Authors: Cheng, C.
Liu, B.
Sie, E.J.
Zhou, W.
Zhang, J. 
Gong, H. 
Alfred Huan, C.H.
Sum, T.C.
Sun, H.
Fan, H.J.
Issue Date: 11-Mar-2010
Citation: Cheng, C., Liu, B., Sie, E.J., Zhou, W., Zhang, J., Gong, H., Alfred Huan, C.H., Sum, T.C., Sun, H., Fan, H.J. (2010-03-11). ZnCdO/ZnO coaxial multiple quantum well nanowire heterostructures and optical properties. Journal of Physical Chemistry C 114 (9) : 3863-3868. ScholarBank@NUS Repository.
Abstract: High quality vertical-aligned arrays of ZnCdO/ZnO coaxial multiple-quantum-well (MQW) nanowire heterostructures are fabricated for the first time by combining a simple chemical vapor deposition (CVD) and pulsed laser deposition (PLD) method. The ZnO nanowire core enables epitaxial and dislocation-free growth of uniform ZnCdO/ZnO quantum wells. Both steady-state and time-resolved photoluminescence measurements of the MQW nanowires are performed in the temperature range of 10-300 K. Strong quantum confinement and carrier localization effect are verified. In addition, an S-shaped temperature dependence is observed for both the exciton emission energy (Ep) and their lifetime in ZnCdO MQWs, which has not previously been reported in ZnMgO MQWs. A simple phenomenological model was introduced to explain this anomalous behavior. Such ZnCdO/ZnO coaxial MQW nanowires might find applications in nanoscale laser sources and other oxide-based quantum devices. © 2010 American Chemical Society.
Source Title: Journal of Physical Chemistry C
ISSN: 19327447
DOI: 10.1021/jp911310r
Appears in Collections:Staff Publications

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