Alloy-fluctuation-induced exciton localization in high-Mg-content (0.27 ≤ x ≤ 0.55) wurtzite MgxZn1-xO epilayers

被引：16

作者：

Liu, Z. L. ^{[1
]}

Mei, Z. X. ^{[1
]}

Wang, R. ^{[1
]}

Zhao, J. M. ^{[1
]}

Liang, H. L. ^{[1
]}

Guo, Y. ^{[1
]}

Kuznetsov, A. Yu ^{[2
]}

Du, X. L. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Univ Oslo, Dept Phys, NO-0316 Oslo, Norway

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2010年 / 43卷 / 28期

基金：

美国国家科学基金会;

关键词：

MOLECULAR-BEAM EPITAXY; STOKES SHIFT; QUANTUM; BLIND; FILMS; EXCITATION; DYNAMICS; OXIDE; ZNO;

D O I：

10.1088/0022-3727/43/28/285402

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Stokes shifts and near-band emission in high-Mg-content single-phase wurtzite Mg(x)Zn(1-x)O (0.27 <= x <= 0.55) epilayers were investigated by photoluminescence (PL) and photoluminescence excitation combining laser and synchrotron excitation experiments. The observed Stokes shifts (e.g. 365 meV for the sample containing 55% Mg) as well as the 'S-shaped' temperature dependence of the maximum PL emissions were explained in terms of Mg compositional fluctuations in our sample resulting in exciton localization in potential traps and, consequently, suppression of non-radiative recombination making high-Mg-content MgZnO a good candidate for optical applications.

引用

页数：5

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