Stoichiometric dependence of optical and photoconductive properties of Bi12TiO20 single crystals

Anna V. Egorysheva; Vladimir I. Burkov; Yuri F. Kargin; Vitaliy M. Skorikov

doi:10.1117/12.418839

15 March 2001 Stoichiometric dependence of optical and photoconductive properties of Bi₁₂TiO₂₀ single crystals

Anna V. Egorysheva, Vladimir I. Burkov, Yuri F. Kargin, Vitaliy M. Skorikov

Proceedings Volume 4358, Optics of Crystals; (2001) https://doi.org/10.1117/12.418839
Event: Optics of Crystals, 2000, Mozyr, Belarus

Abstract

Bi₁₂TiO₂₀ single crystals were grown from the various melt compositions (5.0-10.0 mol.% TiO₂). The stoichiometric dependence of optical and photoconductive properties of Bi₁₂TiO₂₀ crystals is studied. It was observed that the lattice constant value depends on TiO₂-concentration in the melt. The melt composition dependencies of absorption coefficient and circular dichroism value have linear character in spectral range 410- 500 nm. The bismuth-richer melt-grown crystals performed the higher values of absorption coefficient and intensities of the band in the circular dichroism spectrum. It is shown that photoconductivity is more sensitive characteristic to melt composition. The crystal grown from the bismuth- poorest melt exhibits the photoconductivity which is two order of magnitude higher, than in crystal grown from the bismuth-richer melt, over studied spectral range. The crystal grown from 9 mol.% TiO₂ melt composition performs the maximal values of photocurrent and photoinduced absorption. Based on these optical and electrical results, the nature of the local centers in Bi₁₂TiO₂₀ crystals is discussed.

Citation Download Citation

Anna V. Egorysheva, Vladimir I. Burkov, Yuri F. Kargin, and Vitaliy M. Skorikov "Stoichiometric dependence of optical and photoconductive properties of Bi₁₂TiO₂₀ single crystals", Proc. SPIE 4358, Optics of Crystals, (15 March 2001); https://doi.org/10.1117/12.418839

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