Effect of Ni2+ ions concentration on the local crystal field of Zn1-xNixTe nanocrystals

• Published in: Chemical physics letters 2020-07, Vol.750, Article 137481
• Main Authors: Silva, Alessandra S., Figueiredo, Leandro C., de Souza, Paulo E.N., Morais, Paulo C., Pelegrini, Fernando, Dantas, Noelio O.
• Format: Article
• Language: English
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2020.137481

[Display omitted] •Growth of Ni2+ ion-doped ZnTe NCs (Zn1-xNixTe samples) in a glass system using the fusion-nucleation method.•Effect of Ni concentration on the ZnTe NCs local crystalline field.•Nanostructures for technological applications.•Simultaneous use of spin, electronic and optical properties. In this work, we report the study of Zn1-xNixTe nanocrystals in a glass matrix, synthesized by a new protocol based on the fusion-nucleation method. Optical absorption spectra, analyzed based on the crystalline field theory, confirm the substitutional incorporation of Ni2+ ions in the ZnTe semiconductor lattice with tetrahedral symmetry. Transmission electron microscopy images show invariance in the lattice parameter of these nanocrystals, with the incorporation of Ni2+ ions. Electron paramagnetic resonance spectra display resonance lines that confirm the substitutional incorporation (g = 2.0991) and also the presence of Ni2+ ions at Zn vacancy sites (g ≈ 2.0023) of the ZnTe lattice.