ZnO/Al2O3 core-shell nanorod arrays: growth, structural characterization, and luminescent properties

被引：62

作者：

Chen, C. Y. ^{[1
]}

Lin, C. A. ^{[1
]}

Chen, M. J. ^{[2
]}

Lin, G. R. ^{[1
,3
]}

He, J. H. ^{[1
,3
]}

机构：

[1] Natl Taiwan Univ, Inst Photon & Optoelect, Taipei 10617, Taiwan

[2] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 10617, Taiwan

[3] Natl Taiwan Univ, Dept Elect Engn, Taipei 10617, Taiwan

来源：

NANOTECHNOLOGY | 2009年 / 20卷 / 18期

关键词：

MOLECULAR-BEAM EPITAXY; ZNO NANOSTRUCTURES; OPTICAL-PROPERTIES; NANOWIRE; DEPOSITION; SUBSTRATE; EMISSION; DEVICES;

D O I：

10.1088/0957-4484/20/18/185605

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report an aqueous chemical method to fabricate well-aligned ZnO/Al2O3 nanocrystal (NC) core-shell nanorod arrays (NRAs). Structural characterization showed that the shell layers are composed of alpha-Al2O3 nanocrystals. Photoluminescence measurements showed the enhancement of near-band-edge (NBE) emission of ZnO NRAs due to the presence of Al2O3 NC shells. The Al2O3 NC shell layer resulting in the flat-band effect near the ZnO surface leads to a stronger overlap of the wavefunctions of electrons and holes in the ZnO core, further enhancing the NBE emission. This approach should be very useful in designing many other core-shell NRAs for creating varieties of high-efficiency optoelectronic devices.

引用

页数：5

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