| Autor: |
da Silva Pedro, Sandra, López, Ada, Pantoja Sosman, Lilian |
| Zdroj: |
SN Applied Sciences; January 2020, Vol. 2 Issue: 1 |
| Abstrakt: |
In this work, the photoluminescent properties of Zn2TiO4:Cr3+are presented. Samples were prepared from ZnO, TiO2and Cr2O3by solid-state reaction. The compound formation was confirmed by X-ray diffraction. Emissions were obtained using photoluminescence spectroscopy at room temperature. The system crystallizes in the space group Fd3¯mwith an inverse spinel structure. The emission spectrum presents a broad and intense band in the near-infrared region. Photoluminescence excitation shows two bands in the visible frequency range assigned to octahedral Cr3+transitions. Cr3+-doped and undoped sample emissions were compared. Optical spectra were analyzed and interpreted according to the crystal field theory and the Tanabe–Sugano energy matrices for the d3configuration by calculating the Dqand Bparameters. This work is a follow-up of the previous research on transition metal cations used as dopants in a Zn2TiO4lattice, and the current results suggest that the system might be a promising luminescence source at room temperature. |
| Databáze: |
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