Control of interface abruptness of polar MgZnO/ZnO quantum wells grown by pulsed laser deposition

被引：28

作者：

Brandt, Matthias ^{[1
]}

Lange, Martin ^{[1
]}

Stoelzel, Marko ^{[1
]}

Mueller, Alexander ^{[1
]}

Benndorf, Gabriele ^{[1
]}

Zippel, Jan ^{[1
]}

Lenzner, Joerg ^{[1
]}

Lorenz, Michael ^{[1
]}

Grundmann, Marius ^{[1
]}

机构：

[1] Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 05期

关键词：

SPECTROSCOPY; EXCITONS;

D O I：

10.1063/1.3475402

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A strong quantum confined Stark effect (QCSE) was observed in wedge shaped MgZnO/ZnO quantum wells (QWs) grown by pulsed laser deposition. A reduced laser fluence of 1.8 J/cm(2) was used. Reference samples grown at higher standard fluence 2.4 J/cm(2) showed only a negligible QCSE. Using off-axis deposition without substrate rotation, a constant composition of the barriers was maintained while varying the well width in a wedge shaped QW. A redshift of the QW luminescence with increasing QW thickness up to 230 meV below the ZnO emission was found, accompanied by an increase in the exciton lifetime from 0.3 ns up to 4.2 mu s. (C) 2010 American Institute of Physics. [doi:10.1063/1.3475402]

引用

页数：3

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