The role of hydrogen in luminescence of electrochemically oxidized porous Si layer

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Abstract

Remarkable improvements of photoluminescence (PL) efficiency together with large blueshift of PL peak wavelength have been achieved by electrochemical oxidation. It is known from Fourier transform infrared (FT-IR) measurements that the SiO2 covering on pore walls has discontinuities where the surface states are terminated by hydrogen. Dramatic degradation of luminescence transitions in anodically oxidized PSL, due to thermal hydrogen desorption, indicates the importance of hydrogen in electrochemical surface passivation.

Original languageEnglish
Pages (from-to)121-124
Number of pages4
JournalJournal of Luminescence
Volume57
Issue number1-6
DOIs
Publication statusPublished - Jan 1 1993

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ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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