Optical properties of Cr-doped Zn1− x Mn x Te semimagnetic nanocrystals

The effect of Cr co-doping on the optical properties of Mn-doped ZnTe nanocrystals (NCs) embedded in a glass matrix is studied in this paper. The substitutional incorporation of Cr2+ ions into these semiconducting NCs was strongly evidenced by optical absorption and crystal field theory analyses, wh...

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Bibliographic Details
Published in:Applied physics letters 2018-02, Vol.112 (6)
Main Authors: Silva, Alessandra S., Lourenço, Sidney A., da Silva, Marco Aurélio T., Dantas, Noelio O.
Format: Article
Language:English
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Summary:The effect of Cr co-doping on the optical properties of Mn-doped ZnTe nanocrystals (NCs) embedded in a glass matrix is studied in this paper. The substitutional incorporation of Cr2+ ions into these semiconducting NCs was strongly evidenced by optical absorption and crystal field theory analyses, which showed the characteristic transitions of Cr2+ and Cr3+ ions. Transmission electron microscopy images revealed the NC size and invariance lattice parameter, with the incorporation of Mn2+ and Cr2+ ions. PL spectra showed that co-doping with Cr favors a competition between Mn2+ and Cr2+ ions, resulting in a decrease in the rate of Mn2+ substitution, zinc vacancy filling (VZn) in Zn1−x−yMnxCryTe NCs, and the formation of interstitial Cr3+ ions in the host glass system.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5016382