Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1790538 | Journal of Crystal Growth | 2014 | 4 Pages |
Abstract
Heavily tin (Sn)-doped Si crystals in a concentration up to 4Ã1019Â cmâ3 were grown by the Czochralski method. Variation of Sn concentration in the crystals was well expressed by the Pfann equation using a segregation coefficient of k=0.016. From the occurrence of growth interface instability and the appearance of Sn precipitates in the grown crystals, the solubility limit of Sn was considered to be around 5Ã1019Â cmâ3. Interstitially dissolved oxygen Oi was presented at a concentration of 8-9Ã1017Â cmâ3 in the grown Sn-doped crystals. The FT-IR absorption peak relating to a Si-Oi-Si quasi-molecule at 1106Â cmâ1 showed preferential occupation of Oi at the bond-centered position of Si-Si. The Oi peak shifted to the lower wave number side with increasing Sn concentration in Si, implying expansion of the Si-Si bond.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
I. Yonenaga, T. Taishi, K. Inoue, R. Gotoh, K. Kutsukake, Y. Tokumoto, Y. Ohno,