Room temperature photoluminescence from nanostructured amorphous carbon | Zendy

S. J. Henley | Zendy; J. David Carey | Zendy; S. Ravi P. Silva | Zendy

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Room temperature photoluminescence from nanostructured amorphous carbon

Author(s) -

S. J. Henley,

J. David Carey,

S. Ravi P. Silva

Publication year - 2004

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1839641

Subject(s) - photoluminescence , materials science , raman spectroscopy , amorphous solid , amorphous carbon , analytical chemistry (journal) , carbon fibers , laser ablation , argon , spectroscopy , hydrogen , chemical engineering , laser , optoelectronics , crystallography , optics , composite material , chemistry , physics , organic chemistry , chromatography , quantum mechanics , composite number , engineering

Visible room-temperature photoluminescence (PL) was observed from hydrogen-free nanostructured amorphous carbon films deposited by pulsed laser ablation in different background pressures of argon (P-Ar). By varying P-Ar from 5 to 340 mTorr, the film morphology changed from smooth to rough and at the highest pressures, low-density filamentary growth was observed. Over the same pressure regime an increase in the ordering of sp(2) bonded C content was observed using visible Raman spectroscopy. The origin of the PL is discussed in terms of improved carrier localization within an increased sp(2) rich phase.

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