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Optical Materials Express

Optical Materials Express

  • Editor: David Hagan
  • Vol. 4, Iss. 4 — Apr. 1, 2014
  • pp: 624–637

Influence of non-diamond carbon phase on recombination mechanisms of photoexcited charge carriers in microcrystalline and nanocrystalline diamond studied by time resolved photoluminescence spectroscopy

Pavel Galář, Branislav Dzurňák, Marian Varga, Marian Marton, Alexander Kromka, and Petr Malý  »View Author Affiliations

Optical Materials Express, Vol. 4, Issue 4, pp. 624-637 (2014)

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Recombination processes of photoexcited charge carriers in as-grown micro/nanocrystalline diamond films containing various amounts of non-diamond carbon phase were studied by time resolved photoluminescence spectroscopy. The photoluminescence was found to be strongly sensitive to diamond morphology and concentration of non-diamond carbon phase. We found two photoluminescence components differing in decay rates (nano/microsecond time scales) and in response to ambient air pressure, temperature and excitation light parameters. Experimental data form the basis for interpretation of recombination paths of photoexcited charge carriers in micro/nanocrystalline diamond films in dependence on their morphology and non-diamond carbon phase content.

© 2014 Optical Society of America

OCIS Codes
(260.3800) Physical optics : Luminescence
(300.6500) Spectroscopy : Spectroscopy, time-resolved
(320.4240) Ultrafast optics : Nanosecond phenomena
(160.4236) Materials : Nanomaterials
(180.5655) Microscopy : Raman microscopy

ToC Category:
Fluorescent and Luminescent Materials

Original Manuscript: January 6, 2014
Revised Manuscript: February 27, 2014
Manuscript Accepted: February 28, 2014
Published: March 7, 2014

Pavel Galář, Branislav Dzurňák, Marian Varga, Marian Marton, Alexander Kromka, and Petr Malý, "Influence of non-diamond carbon phase on recombination mechanisms of photoexcited charge carriers in microcrystalline and nanocrystalline diamond studied by time resolved photoluminescence spectroscopy," Opt. Mater. Express 4, 624-637 (2014)

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