Photoconductivity of Bi12Ti1-xPbxO20 Single Crystal |
M.T. Borowieca, B. Kozankiewicza, H. Szymczaka, J. Żmijab, A. Majchrowskib, M. Załęskia and T. Zayarnyuka a Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland b Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-908 Warsaw, Poland |
Received: August 25, 1999; revised version November 8, 1999 |
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Single crystals of mixed sillenites Bi12Ti1-xPbxO20 were grown using the top seeded solution growth method. The pulse illumination was used to study the phototransport properties of these crystals. It was evidenced that the illumination changed the photoconducting properties by 4-5 orders of magnitude comparing with previously studied Bi12MeO20, where Me = Ge, Si, Ti. The performed experiments indicate on the photogeneration of metallic grains in the insulating matrix of Bi12Ti1-xPbxO20. Correlations between photochromism and photoconductivity was established. |
DOI: 10.12693/APhysPolA.96.785 PACS numbers: 72.40.+w, 78.20.Nv, 72.20.Jv |