Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Optical properties of LiNbO3:B crystals

N.V. Sidorov, M.V. Smirnov, R.A. Titov, N.A. Teplyakova, M.N. Palatnikov

Tananaev Institute of Chemistry  Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences»

DOI: 10.26456/pcascnn/2022.14.227

Original article

Abstract: The optical properties of nominally pure LiNbO3stoich, near-stoichiometric LiNbO3stoich (6,0 wt% K2O), LiNbO3cong and LiNbO3:B (0,55 and 0,83 mol% B2O3 in the charge) crystals in the visible region of the spectrum (λ = 380-700 nm) were studied by photoluminescence. LiNbO3:B crystals were grown by Czochralski using the technology of a direct solid-phase doping of the congruent charge by boron oxide (B2O3). The photoluminescence intensity increases in the series of crystals: LiNbO3stoich, LiNbO3stoich (6,0 wt% K2O), and LiNbO3cong. The photoluminescence intensity is determined by the concentration of deep electron traps (NbLi – «niobium antisite») and the stoichiometry of these crystals. The photoluminescence intensity of LiNbO3:B (0,55 and 0,83 mol% B2O3 in the charge) crystals is close to the photoluminescence intensity of LiNbO3stoich crystal. This can be explained by the fact that the composition and structure of LiNbO3:B (0,55 and 0,83 mol% B2O3 in the charge) crystals approach the composition and structure of the stoichiometric crystal.

Keywords: lithium niobate, crystal, defects, direct solid-phase doping, photoluminescence

  • Nikolay V. Sidorov – Dr. Sc., Professor, Chief Researcher and as Head of the Vibrational Spectroscopy Sector of the Electronic Engineering Materials Laboratory, Tananaev Institute of Chemistry  Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences»
  • Maksim V. Smirnov – postgraduate student, Tananaev Institute of Chemistry  Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences»
  • Roman A. Titov – Junior Researcher, Vibrational Spectroscopy Sector of the Electronic Engineering Materials Laboratory, Tananaev Institute of Chemistry  Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences»
  • Natalya A. Teplyakova – Ph. D., Senior Researcher, Vibrational Spectroscopy Sector of the Electronic Engineering Materials Laboratory, Tananaev Institute of Chemistry  Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences»
  • Mikhail N. Palatnikov – Dr. Sc., Chief Researcher and as Head of the Electronic Engineering Materials Laboratory, Tananaev Institute of Chemistry  Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences»

Reference:

Sidorov, N.V. Optical properties of LiNbO3:B crystals / N.V. Sidorov, M.V. Smirnov, R.A. Titov, N.A. Teplyakova, M.N. Palatnikov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2022. — I. 14. — P. 227-234. DOI: 10.26456/pcascnn/2022.14.227. (In Russian).

Full article (in Russian): download PDF file

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