Strong blue-green luminescence of silicon-rich silicon oxide with doping of C and TB

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The effects of C doping and Tb co-doping on the enhancement of visible luminescence from silicon-rich silicon oxide (SRSO), which consists of Si nanoclusters embedded inside an SiO2 matrix, are investigated. C-doped SR.SO (SRSO : C) and Tb co-doped films were fabricated by an electron cyclotron resonance-plasma enhanced chemical vapor deposition method with concurrent sputtering of Tb target by using SiH4, O-2, and CH4 source gases followed by a high temperature anneal. Intense blue-white visible luminescence, visible to the naked eye under daylight conditions, was observed from SRSO : C film with a nearly equal amount of C and excess Si, after an anneal at 950 C and furthermore tuned by controlling the C to excess Si ratio, the C content, and the anneal temperature. The film co-doped with Tb also shows strong Tb3+ photoluminescence which is enhanced by the content of C. The 543 nm Tb3+ lifetimes were in the range of 0.5 - 1.2 msec, comparable to those from Tb-doped silica. Based on the results, we conclude that exciton recombination in C-incorporated Si nanoclusters is responsible for visible luminescence of SRSO : C and can efficiently excite incorporated Tb3+ ions.
Publisher
KOREAN PHYSICAL SOC
Issue Date
2004-12
Language
English
Article Type
Article; Proceedings Paper
Keywords

RARE-EARTH IONS; ER3+ LUMINESCENCE; SI NANOCRYSTALS; QUANTUM DOTS; THIN-FILMS; DOPED GAN; PHOTOLUMINESCENCE; OXYGEN

Citation

JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.45, pp.S689 - S692

ISSN
0374-4884
URI
http://hdl.handle.net/10203/81420
Appears in Collection
NT-Journal Papers(저널논문)
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