Abstract
The ternary equilibrium diagram Zn-Sn-Se has been calculated for a liquid of composition x Zn = x Se = 10 -2 to 5x10 -2. For each binary system the liquid mixing energies (mixing enthalpy, excess entropy), are determined from literature data and by minimization of the total free enthalpy (Simplex method). The ternary diagram is generated in the same way with the help of the solubility measurements of ZnSe in Sn done by Rubenstein (1968) and us. Our experiments were performed in a special close tube arrangement also used for ZnSe epitaxy from tin solution. Epitaxial layers were prepared at temperature around 950°C on ZnSe substrates. Photoluminescence and electrical measurements indicate the material is donor doped. Chemical analysis reveals a profile of Al with a maximum near the substrate interface. That points out the importance of substrate purity in II-VI compounds epitaxy.
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