Abstract
The spectroscopic characteristics of theα-ZnAl2S4 wide bandgap semiconductor doped with Ti ions are investigated. It is shown, that theZnAl2S4:Ti spinel-type crystals exhibit luminescence in the IR spectral range 0.8–1.4 µm.The observed spectroscopic characteristics are assigned to the emission bands arising from the ligand-Ti4+ charge transfer for octahedral sites of titanium that is in agreement with the experimentalevidence for the absence of the EPR signal from Ti ions. A qualitative explanation of theexperimental data is given.
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