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Growth, structural and optical properties of ZnO/ZnMgO core-shell heterostructures

被引：0
|
作者：
Hassani, S. A. Said [1 ]
Sartel, C. [1 ]
Vilar, C. [1 ]
Amiri, G. [1 ]
Lusson, A. [1 ]
Sallet, V. [1 ]
Galtier, P. [1 ]
机构：
[1] Univ Paris Saclay, Univ Versailles St Quentin En Yvelines, CNRS, Grp Etud Matiere Condensee, 45 Ave Etats Unis, F-78035 Versailles, France
来源：
PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 13 NO 7-9 | 2016年 / 13卷 / 7-9期
关键词：
ZnO nanowires; core-shell; MOCVD growth; ZnMgO alloy; MOLECULAR-BEAM EPITAXY; ALIGNED ZNO NANORODS; MORPHOLOGY;
D O I：
10.1002/pssc.201600001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
ZnO nanowires have been grown by metalorganic chemical vapor deposition on sapphire substrates. The use of N2O and DEZn as oxygen and zinc precursors combined with high temperature leads to the spontaneous growth of vertical ZnO nanowires (NWs) on underlying three dimensional islands present at the bottom of each nanowire. These nanowires are grown along the c axis of the wurtzite structure, exhibit well defined m-plane facets and are free of extended defects. This configuration is favorable to band-gap engineering studies. Based on this, we have grown a series of radial ZnO/ZnMgO shells and quantum wells with different thicknesses and Mg concentrations. ZnxMg1-xO alloys have been grown using O-2, (MCp)(2)Mg and DEZn as oxygen, magnesium and zinc precursors. Low temperature photoluminescence spectroscopy and transmission electron microscopy have assessed Mg concentrations in the shell up to 20 %. Electron diffraction reveals that the ZnMgO alloyed structure is, at least partially, ordered. Micro-photo-luminescence performed on a single ZnO/ZnMgO core-shell nanowire including a quantum well exhibits luminescence properties, with a lateral quantum confined emission. (C) 2016 WILEY-VCH Verlag GmbH & Co.
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页码：564 / 567
页数：4
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