Abstract—
Сu1 – xAl0.25In0.75Se2 copper-deficient solid solutions with the chalcopyrite structure have been prepared by elemental synthesis from Cu, In, Al, and Se, and their unit-cell parameters have been determined for the first time as functions of x in the range 0 < x ≤ 0.20. It has been shown that the band peaking at 1.320 eV in the 78-K cathodoluminescence spectra of the Сu1 – xAl0.25In0.75Se2 solid solutions is most likely due to CuM and MCu (M = Al, In) antisite defects resulting from exchange of atoms between the copper and indium–aluminum sublattices in the chalcopyrite structure and that the band peaking at 1.245 eV arises from Cu2+ · VCu associates, which are predominant defects.
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This work was supported by the Russian Federation Ministry of Science and Higher Education, state research target no. AAAA-A19-119070790003-7.
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Gapanovich, M.V., Odin, I.N., Chukichev, M.V. et al. Structure and Luminescence Properties of Сu1 – xAl0.25In0.75Se2 (0 < x ≤ 0.20) Copper-Deficient Chalcopyrite Solid Solutions. Inorg Mater 57, 124–129 (2021). https://doi.org/10.1134/S0020168521010064
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DOI: https://doi.org/10.1134/S0020168521010064