Abstract
ZnSe x S 1− x single crystals which can be used in blue luminescent devices have been prepared from the vapor phase by sublimation method. Their photoluminescence and reflection spectra were measured. Typically, there was a very weak free exciton luminescence; but, the bound exciton emissions were very pronounced, indicating the presence of substitutional impurities in the form of neutral donors and acceptors. The energy band profile was been obtained within the wide composition range of bulk ZnSe x S 1− x single crystals.
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