Origin of luminescence from Si−-implanted (11¯02) Al2O3

作者: C. J. Park , Y. H. Kwon , Y. H. Lee , T. W. Kang , H. Y. Cho

DOI: 10.1063/1.1699471

关键词:

摘要: Cathodoluminescence (CL), photoluminescence, and transmission electron microscopy have been used to study the light-emitting structural properties of (11¯02) sapphire implanted with 30-keV Si ions subsequently annealed at temperatures up 1100 °C. This procedure creates oriented crystallites diameters in range 4–5 nm together extended defects parallel (0001) planes (11¯02) Al2O3. Several CL bands found Si−-implanted Al2O3(Al2O3:Si−) before and/or after annealing are compared those from O−- Al−-implanted samples. These related experiments, including temperature implant dose dependence, suggest that a yellow band (2.16 eV/574 nm) Al2O3:Si− is nanocrystal related, while others defect related.

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