Multi-band structure of amorphous carbon luminescence

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Structured photoluminescence (PL) spectra of hydrogenated amorphous carbon (a-C:H) layers prepared from benzene are presented. The spectra contain bands with peak positions in the range of 4.34-4.50, 3.93-4.01 and 3.64-3.79 eV in the ultraviolet region, and additional luminescence bands are in the energy regions of 3.19-3.28 and 2.85-2.96 eV, besides the previously mostly measured band, with a peak in the 2.28-2.48 eV photon energy range. Relative efficiency of these bands depends on the deposition conditions. Each of the new bands could be excited above a given photon energy and, therefore, the overall spectral shape as well as the structured feature of a-C:H luminescence varies with excitation energy. It is supposed that the opening of new radiation recombination transitions with increasing excitation energy explains the appearance of new luminescence bands.

Original languageEnglish
Pages (from-to)1115-1118
Number of pages4
JournalDiamond and Related Materials
Volume11
Issue number3-6
DOIs
Publication statusPublished - Mar 2002

Fingerprint

Amorphous carbon
Band structure
Luminescence
Excitation energy
luminescence
carbon
Photons
Electron transitions
Benzene
Photoluminescence
energy
Radiation
photons
excitation
benzene
photoluminescence
radiation

Keywords

  • Amorphous hydrogenated carbon
  • Band structure
  • Photoluminescence
  • UV range

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Multi-band structure of amorphous carbon luminescence. / Koós, M.; Füle, M.; Veres, M.; Tóth, S.; Pócsik, I.

In: Diamond and Related Materials, Vol. 11, No. 3-6, 03.2002, p. 1115-1118.

Research output: Contribution to journalArticle

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AU - Füle, M.

AU - Veres, M.

AU - Tóth, S.

AU - Pócsik, I.

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N2 - Structured photoluminescence (PL) spectra of hydrogenated amorphous carbon (a-C:H) layers prepared from benzene are presented. The spectra contain bands with peak positions in the range of 4.34-4.50, 3.93-4.01 and 3.64-3.79 eV in the ultraviolet region, and additional luminescence bands are in the energy regions of 3.19-3.28 and 2.85-2.96 eV, besides the previously mostly measured band, with a peak in the 2.28-2.48 eV photon energy range. Relative efficiency of these bands depends on the deposition conditions. Each of the new bands could be excited above a given photon energy and, therefore, the overall spectral shape as well as the structured feature of a-C:H luminescence varies with excitation energy. It is supposed that the opening of new radiation recombination transitions with increasing excitation energy explains the appearance of new luminescence bands.

AB - Structured photoluminescence (PL) spectra of hydrogenated amorphous carbon (a-C:H) layers prepared from benzene are presented. The spectra contain bands with peak positions in the range of 4.34-4.50, 3.93-4.01 and 3.64-3.79 eV in the ultraviolet region, and additional luminescence bands are in the energy regions of 3.19-3.28 and 2.85-2.96 eV, besides the previously mostly measured band, with a peak in the 2.28-2.48 eV photon energy range. Relative efficiency of these bands depends on the deposition conditions. Each of the new bands could be excited above a given photon energy and, therefore, the overall spectral shape as well as the structured feature of a-C:H luminescence varies with excitation energy. It is supposed that the opening of new radiation recombination transitions with increasing excitation energy explains the appearance of new luminescence bands.

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