Cathodoluminescence of single ZnO nanorod heterostructures

被引：13

作者：

Piechal, Bernard

Yoo, Jinkyoung

Elshaer, Abdelhamid

Mofor, Augustine Che

Yi, Gyu-Chul

Bakin, Andrey

Waag, Andreas

Donatini, Fabrice

Dang, Le Si

机构：

[1] Univ Grenoble 1, CNRS CEA UFJ Joint Grp Nanophys & Semicond, CNRS, UMR 5588, F-38402 St Martin Dheres, France

[2] Pohang Univ Sci & Technol, Natl CRI Ctr Semicond Nanorods, Pohang 790784, South Korea

[3] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea

[4] TU Braunschweig, IHT, D-38106 Braunschweig, Germany

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2007年 / 244卷 / 05期

关键词：

D O I：

10.1002/pssb.200675104

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Optical properties of ZnO-based single nanorods are probed by cathodoluminescence (CL) measurements at T=5 K. We observe a variation of the ZnO near band edge CL by three orders of magnitude along the nanorod axis, accompanied by a spectral blueshift of 10-30 meV. This indicates a rather poor structural quality of the nanorod bottom part, close to the substrate. ZnO/ZnMgO quantum wells grown on top of ZnO nanorods are found to exhibit much stronger confinement effects as compared to their two-dimensional counterparts, suggesting a reduced spontaneous and piezoelectric polarization effects. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：1458 / 1461

页数：4

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