Evidence that blue luminescence of oxidized porous silicon originates from SiO2

DOI PDF 被引用文献5件
  • A. J. Kontkiewicz
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • A. M. Kontkiewicz
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • J. Siejka
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • S. Sen
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • G. Nowak
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • A. M. Hoff
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • P. Sakthivel
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • K. Ahmed
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • P. Mukherjee
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • S. Witanachchi
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620
  • J. Lagowski
    Center for Microelectronics Research and Physics Department, University of South Florida, Tampa, Florida 33620

抄録

<jats:p>We have analyzed red and blue luminescence from porous silicon as a function of oxidation parameters and feature dimension determined with an atomic force microscope. We have found correlation between blue luminescence intensity and the increase in feature size caused by oxidation. We have further shown that blue luminescence, is identical, with respect to spectrum and fast decay, to that of high microelectronic quality SiO2 grown on crystalline silicon using dry oxygen plus an organic chlorine compound. Thus, we conclude that blue luminescence originates from SiO2 film rather than from the silicon nanocrystals in the porous material. Intensity enhancement, as compared to SiO2 on crystalline wafers, comes from the gigantic surface area of porous silicon.</jats:p>

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