Composite character of the photoluminescence in hydrogenated amorphous carbon films

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10 Citations (Scopus)

Abstract

Composite photoluminescence (PL) spectra, consisting of numerous characteristic bands, are presented for hydrogenated amorphous carbon (a-C:H) layers, prepared from methane or benzene. Some of these appear already in the visible range of excitation, the others can be excited by UV light only. Three peaks with maximum position in the range 4.34-4.50, 3.93-4.01 and 3.64-3.70 eV are in the ultraviolet region. Additional peaks appear in the ranges 3.17-3.22 and 2.85-2.92 eV beside the well-known broad PL band with maximum in the 2.1-2.33 eV range. The relative intensities vary on deposition conditions. Our results measured on numerous samples strongly suggest the existence of some type of intrinsic radiative centers.

Original languageEnglish
Pages (from-to)852-857
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume299-302
Issue numberPART 2
DOIs
Publication statusPublished - Apr 1 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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