Controllable Growth and Characterization of ZnO/MgO Quasi Core−Shell Quantum Dots
Crystal Growth & Design2008Vol. 9(1), pp. 263–266
Citations Over TimeTop 15% of 2008 papers
Y. J. Zeng, Z. Z. Ye, F. Liu, Donghan Li, Yong Lu, Wolfgang Jäeger, Haiping He, Li Zhu, Jingyun Huang, B. H. Zhao
Abstract
ZnO/MgO quasi core−shell quantum dots (QDs) were grown by a metal-organic chemical vapor deposition method on silicon substrates. The core−shell structure was well-characterized by a combination of cross-sectional transmission electron microscopy and angle-resolved X-ray photoelectron spectroscopy (XPS). Valence band XPS measurements were performed to investigate the effects of MgO shell layer on the energy band of ZnO/MgO QDs. Photoluminescence (PL) emission from the QDs showed remarkable enhancement after the growth of the MgO layer. In addition, exciton binding energy of 118 ± 5 meV in the ZnO/MgO QDs was obtained from temperature-dependent PL.
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