Abstract
Spectroscopic studies have been conducted for wurtzite ZnO/Mg 0.27Zn 0.73O 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 nm . 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.
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More From: Physica E: Low-dimensional Systems and Nanostructures
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