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- Title
Structural Defects and Photoluminescence in Zinc-Doped Lithium Niobate Crystals.
- Authors
Sidorov, N. V.; Teplyakova, N. A.; Smirnov, M. V.; Palatnikov, M. N.
- Abstract
We demonstrate that increasing the zinc concentration in Zn-doped lithium niobate crystals to their first concentration threshold (~3.0 mol % ZnO) leads to a decrease in photovoltaic field, an increase in diffusion field, and a decrease in the luminescence intensity of NbLi emission centers. As the zinc concentration approaches the second concentration threshold (~6.8 mol % ZnO), the photovoltaic field increases, which is accompanied by a decrease in diffusion field and band gap. In addition, the integrated luminescence intensity drops as a consequence of the reduction in the concentration of defect centers in the form of NbLi–NbNb bipolaron pairs. At the same time, the emission intensity of NbLi small polarons increases and the photorefractive effect decreases markedly.
- Subjects
PHOTOREFRACTIVE effect; PHOTOLUMINESCENCE; BAND gaps; CRYSTALS; LITHIUM niobate; ZINC oxide
- Publication
Inorganic Materials, 2021, Vol 57, Issue 10, p1028
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1134/S0020168521100149