Influence of bismuth oxide purity and growth conditions on properties of photoexcited charge carriers in sillenite-structure crystals

Elena V. Mokrushina; Yu. B. Afanasiev; A. A. Nechitailov; A. A. Petrov; Victor V. Prokofiev

doi:10.1117/12.280730

14 July 1997 Influence of bismuth oxide purity and growth conditions on properties of photoexcited charge carriers in sillenite-structure crystals

Elena V. Mokrushina, Yu. B. Afanasiev, A. A. Nechitailov, A. A. Petrov, Victor V. Prokofiev

Author Affiliations +

Proceedings Volume 3178, Solid State Crystals: Growth and Characterization; (1997) https://doi.org/10.1117/12.280730
Event: XII Conference on Solid State Crystals: Materials Science and Applications, 1996, Zakopane, Poland

Abstract

Influence of bismuth oxide purity and growth conditions on photorefractive properties of sillenite structure materials has been analyzed. Various impurities present in starting materials affect significantly on photoexcited charge carriers in sillenites. Small concentrations of chromium (approximately 10^-4 wt.%) in Bi₁₂TiO₂₀ crystals decreases the diffusion length L_d of photoinduced charge carriers. Cr- doped BTO crystals were found to be sensitive in near IR region due to 'tails' in their absorption spectrum. Sillenite structure crystals grown in an oxygen-free atmosphere contain lower concentration of acceptor centers and demonstrate higher photoconductivity.

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Elena V. Mokrushina, Yu. B. Afanasiev, A. A. Nechitailov, A. A. Petrov, and Victor V. Prokofiev "Influence of bismuth oxide purity and growth conditions on properties of photoexcited charge carriers in sillenite-structure crystals", Proc. SPIE 3178, Solid State Crystals: Growth and Characterization, (14 July 1997); https://doi.org/10.1117/12.280730

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