Structural Defects and Photoluminescence in Zinc-Doped Lithium Niobate Crystals.
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| Title: | Structural Defects and Photoluminescence in Zinc-Doped Lithium Niobate Crystals. |
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| Authors: | Sidorov, N. V.1 (AUTHOR), Teplyakova, N. A.1 (AUTHOR) n.tepliakova@ksc.ru, Smirnov, M. V.1 (AUTHOR), Palatnikov, M. N.1 (AUTHOR) |
| Source: | Inorganic Materials. Oct2021, Vol. 57 Issue 10, p1028-1034. 7p. |
| Subjects: | Photorefractive effect, Photoluminescence, Band gaps, Crystals, Lithium niobate, Zinc oxide |
| 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. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| 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. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00201685 |
| DOI: | 10.1134/S0020168521100149 |
