| Autor: |
Tokko, Olga Vladimirovna, Kadetova, Alexandra Vladimirovna, Prusskii, Andrey Ivanovich, Smirnov, Maxim Vladimirovich, Palatnikov, Mikhail Nikolaevich, Sidorov, Nikolay Vasilievich |
| Zdroj: |
Physica Status Solidi (A) - Applications and Materials Science; March 2024, Vol. 221 Issue: 6 |
| Abstrakt: |
The correlation between photoluminescence in the near‐IR region and point defect centers in the LiNbO3crystals co‐doped with Zn and Mg both by homogeneous and direct methods has been studied. X‐ray diffraction (XRD) analysis shows that the LiNbO3:Zn:Mg (4.68:0.9 mol%) crystal obtained by homogeneous doping has the least number of intrinsic defects compared to the others. It has been established that ZnLidefects stimulate photoluminescence (PL) in the near‐IR region of the luminescence spectrum in the LiNbO3:Zn:Mg crystals obtained by homogeneous doping. The LiNbO3:Zn:Mg (4.68:0.90 mol%) crystal has the maximum PL intensity and the LiNbO3:Zn:Mg (3.83:0.97 mol%) crystal has the minimum. Both crystals are doped homogeneously. Such defects as niobium vacancies (VNb) and niobium in the empty octahedron (Nboct) are suggested as luminescence quenchers in the co‐doped crystals. In the directly doped LiNbO3:Zn:Mg crystals impurities are placed in the lithium position. In homogeneously doped crystals the mechanism of magnesium incorporation into the structure depends on the zinc concentration. The ZnLidefects stimulated photoluminescence (PL) in the near‐IR region of the spectrum in the homogeneously doped crystals. The maximum PL intensity was observed in the LiNbO3:Zn:Mg (4.68:0.90 mol%) crystal. |
| Databáze: |
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