Origin of Blue Photoluminescence from Naturally Oxidized Porous Silicon

Abstract:

Upon the 325 nm excitation from a helium-cadmium laser, the photoluminescence (PL) from aged porous silicon was investigated with fluorescence spectroscopy. Each PL spectrum of the aged porous silicon films contained two luminescent bands, one of the luminescent bands peaked at about 466.7 nm whereas the other luminescent band peaked at about 596.1 nm. The origin of the blue PL from aged porous silicon was discussed, and our results indicated that the blue photoluminescence of porous silicon films originated from the silicon oxide itself.

• Periodical: Solid State Phenomena (Volumes 181-182)
• Pages: 374-377
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.181-182.374
• Online since: November 2011
• Authors: Yuan Ming Huang, Qing Lan Ma, Bao Gai Zhai
• Keywords: Blue Emission, Oxidation, Photoluminescence (PL), Porous Silicon, Silicon Oxide

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