Quantum confinement effect in ZnO/Mg0.2Zn0.8O multishell nanorod heterostructures

Eue Soon Jang, Jun Young Bae, Jinkyoung Yoo, Won Il Park, Dong Wook Kim, Gyu Chul Yi, T. Yatsui, M. Ohtsu

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Abstract

We report on photoluminescence measurements of Mg0.2 Zn0.8 OZnO Mg0.2 Zn0. 8 O multishell layers on ZnO core nanorods. Dominant excitonic emissions in the photoluminescence spectra show a blueshift depending on the ZnO shell layer thickness attributed to the quantum confinement effect in the nanorod heterostructure radial direction. Furthermore, near-field scanning optical microscopy clearly shows sharp photoluminescence peaks from the individual nanorod quantum structures, corresponding to subband levels.

Original languageEnglish
Article number023102
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume88
Issue number2
DOIs
StatePublished - 2006

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