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Proceedings Paper

Stoichiometric dependence of optical and photoconductive properties of Bi12TiO20 single crystals
Author(s): Anna V. Egorysheva; Vladimir I. Burkov; Yuri F. Kargin; Vitaliy M. Skorikov
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Paper 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.

Paper Details

Date Published: 15 March 2001
PDF: 5 pages
Proc. SPIE 4358, Optics of Crystals, (15 March 2001); doi: 10.1117/12.418839
Show Author Affiliations
Anna V. Egorysheva, Kurnakov Institute of General and Inorganic Chemistry (Russia)
Vladimir I. Burkov, Moscow Institute of Physics and Technology (Russia)
Yuri F. Kargin, Kurnakov Institute of General and Inorganic Chemistry (Russia)
Vitaliy M. Skorikov, Kurnakov Institute of General and Inorganic Chemistry (Russia)


Published in SPIE Proceedings Vol. 4358:
Optics of Crystals
Vasiliy V. Shepelevich; N. N. Egorov, Editor(s)

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