Luminescence efficiency enhancement in laser soaked hydrogenated amorphous carbon films

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Abstract

A photoluminescence (PL) intensity increase and blue shift of PL spectra of annealed a-C:H films were observed under illumination by a laser beam of 2.54 eV photon energy. Saturation of PL intensity with characteristic times over 1000 s following an exponential curve was observed in samples deposited at 0 and -70 V bias. Upon incrementing the illumination intensity, faster saturation was observed. The findings were discussed in the framework of a PL mechanism, where excitation and recombination occur on π-bonded aggregates. The size distribution of these clusters in heat treated samples was supposed to shift to lesser mean value by laser illumination.

Original languageEnglish
Pages (from-to)2245-2247
Number of pages3
JournalApplied Physics Letters
Volume65
Issue number18
DOIs
Publication statusPublished - Jan 1 1994

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luminescence
photoluminescence
augmentation
carbon
illumination
lasers
saturation
shift
blue shift
laser beams
heat
photons
curves
excitation
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Luminescence efficiency enhancement in laser soaked hydrogenated amorphous carbon films. / Koós, M.; Pócsik, I.; Toth, L.

In: Applied Physics Letters, Vol. 65, No. 18, 01.01.1994, p. 2245-2247.

Research output: Contribution to journalArticle

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