期刊
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
卷 21, 期 2-4, 页码 671-675出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physe.2003.11.110
关键词
quantum wells; II-VI semiconductors; quantum-confined stark effect; phonon-exciton interactions
Spectroscopic studies have been conducted for wurtzite ZnO/Mg0.27Zn0.73O multiple quantum wells. Internal electric fields at interfaces are found to have an influence on the photoluminescence (PL) properties for well width (L-w) greater than 4.2 mn. These experimentally observed features are characteristic of the quantum-confined Stark effects; the magnitude of the electric field due to spontaneous and piezoelectric polarizations and the depth of the triangle-shaped potential wells are the monotonically increasing functions of Mg concentration and the L-w, respectively. Results of the time-resolved PL study are also presented. (C) 2003 Elsevier B.V. All rights reserved.
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