Abstract
The work considers the influence of various types of equilibrium defects on photovoltaic and diffusion fields and on the band gap of nominally pure and zinc-doped lithium niobate crystals. Concentrations of OH groups and point defects in the NbLi cationic sublattice (the deepest electron traps) and the Li/Nb ratio are calculated from the IR absorption spectra to estimate their contributions to proton conductivity. The IR absorption spectra reveal a correlation between the concentration of NbLi defect and the intensity of bands at ~3480 cm–1.
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Russian Text © The Author(s), 2021, published in Zhurnal Strukturnoi Khimii, 2021, Vol. 62, No. 8, pp. 1286-1295.https://doi.org/10.26902/JSC_id78520
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Sidorov, N.V., Teplyakova, N.A. & Palatnikov, M.N. STUDY OF THE DEFECTIVE STRUCTURE OF LITHIUM NIOBATE CRYSTALS OF DIFFERENT COMPOSITIONS AND THEIR INFLUENCE ON THE OPTICAL AND ELECTRICAL PROPERTIES. J Struct Chem 62, 1200–1208 (2021). https://doi.org/10.1134/S0022476621080059
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DOI: https://doi.org/10.1134/S0022476621080059