Preparation and Optical Properties of Zn1-xMnxTe1-yOy Highly Mismatched Alloy
A. Avdonin a, L. Van Khoi a, W. Pacuski b, V. Domukhovski a and R.R. Gałązka a
a Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
b Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland
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Received: 9 06 2007;
The Zn1-xMnxTe1-yOy alloy was prepared using a rapid crystallization technique. X-ray diffraction measurements were used to estimate the oxygen doping level. It is demonstrated that the oxygen solubility in Zn1-x MnxTe1-yOy alloys greatly depends on the manganese concentration. No oxygen related effects were observed in the manganese free samples. The highest value of the oxygen molar fraction (y) achieved in the present study was 0.0023 in a sample having manganese fraction (x) of 0.056. The decrease in the alloy band gap was observed with increasing oxygen content. The oxygen-related trap level in Zn1-xMnxTe1-yOy was found to be strongly shifted with respect to that in ZnTe1-yOy. The shift is assigned to a creation of complex (MnxO) traps.
DOI: 10.12693/APhysPolA.112.407
PACS numbers: 61.66.Dk, 61.72.Vv, 78.55.-m