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Photoluminescence of Liquid Crystal Infiltrated Porous Silicon Film

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Abstract:

We have investigated the photoluminescence (PL) of a porous silicon film in which a typical nematic liquid crystal 4-pentyl-4’-cyanobiphenyl infiltrated. Before the liquid crystal filtration, the PL spectrum of the porous silicon film is comprised of two luminescent bands, one of which is located at about 600 nm whereas the other of which is located at about 450 nm. After the liquid crystal filtration, the porous silicon film gives off intense deep-blue PL with its peak located at about 400 nm at the cost of the complete quenching of the PL from the original porous silicon film. Our results have demonstrated that the luminescent properties of porous silicon films can be dramatically modified by liquid crystal infiltration.

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Periodical:

Materials Science Forum (Volumes 663-665)

Pages:

812-815

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.663-665.812

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Online since:

November 2010

Authors:

Yuan Ming Huang, Qing Lan Ma, Bao Gai Zhai

Keywords:

Infiltration, Nematic Liquid Crystal, Photoluminescence (PL), Porous Silicon (PS)

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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