Highly photoconducting sillenite single crystals

Single crystals of Bi 12TiO 20, and Bi 40Ga 2O 63 (titanium, and gallium sillenite) were grown with use of Top Seeded Solution Growth (TSSG) technique. Mixed sillenites described by the formula Bi 12Ti 1–xM xO 20 (M=V, Ga, Pb), some of them doped additionally with Cu were also obtained. Photoconduct...

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Bibliographic Details
Published in:Crystal engineering 2002-09, Vol.5 (3), p.273-282
Main Authors: Żmija, J., Borowiec, M.T., Majchrowski, A., Szymczak, H., Zayarnyuk, T.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Electronic transport in condensed matter
Exact sciences and technology
Growth from solutions
Materials science
Methods of crystal growth
physics of crystal growth
Photochromism
Photoconduction and photovoltaic effects
Photoconduction and photovoltaic effects
photodielectric effects
Photoconductivity
Physics
Sillenites
Top seeded solution growth
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Summary:Single crystals of Bi 12TiO 20, and Bi 40Ga 2O 63 (titanium, and gallium sillenite) were grown with use of Top Seeded Solution Growth (TSSG) technique. Mixed sillenites described by the formula Bi 12Ti 1–xM xO 20 (M=V, Ga, Pb), some of them doped additionally with Cu were also obtained. Photoconductivity under permanent, chopped, and pulse illumination and photochromism of obtained crystals were investigated and discussed. Some characteristic common features were found for photoconductivity obtained under conditions of chopped and constant illumination. Comparing the best known sillenite photoconductors we managed to obtain mixed titanium sillenites having photoconductivity four to five orders of magnitude higher.
ISSN:1463-0184
DOI:10.1016/S1463-0184(02)00038-2