Platinum Assisted Vapor-Liquid-Solid Growth of Er-Si Nanowires and Their Optical Properties

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We report the optical activation of erbium coated silicon nanowires (Er-SiNWs) grown with the assist of platinum (Pt) and gold (Au), respectively. The NWs were grown on Si substrates by using a chemical vapor transport process using SiCl(4) and ErCl(4) as precursors. Pt as well as Au worked successfully as vapor-liquid-solid (VLS) catalysts for growing SiNWs with diameters of similar to 100 nm and length of several micrometers, respectively. The SiNWs have core-shell structures where the Er-crystalline layer is sandwiched between silica layers. Photoluminescence spectra analyses showed the optical activity of SiNWs from both Pt and Au. A stronger Er(3+) luminescence of 1,534 nm was observed from the SiNWs with Pt at room- and low-temperature (25 K) using the 488- and/or 477-nm line of an Ar laser that may be due to the uniform incorporation of more Er ions into NWs with the exclusion of the formation of catalyst-induced deep levels in the band-gap. Pt would be used as a VLS catalyst for high performance optically active Er-SiNWs.
Publisher
SPRINGER
Issue Date
2010-02
Language
English
Article Type
Article
Keywords

SILICON NANOWIRES; ENERGY-TRANSFER; ERBIUM; LUMINESCENCE; ACTIVATION; EXCITATION; DEPOSITION; GOLD; FILM

Citation

NANOSCALE RESEARCH LETTERS, v.5, pp.286 - 290

ISSN
1931-7573
DOI
10.1007/s11671-009-9477-5
URI
http://hdl.handle.net/10203/99356
Appears in Collection
NT-Journal Papers(저널논문)
Files in This Item
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