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FTIRS study of porous silicon at different oxidation stages

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Abstract

Electroluminiscence (EL) in liquid of porous silicon (PS) has been attributed to radiative recombination of electrochemically generated holes from the bulk of the semiconductor and electrons injected into the conduction band of PS by species adsorbed on the surface. An examination of the surface of PS submitted to oxidation by means of Fourier Transform Infrared Spectroscopy indicates that the concentration of Si-Hx bonds does not significantly vary during the time interval in which EL is recorded, and therefore that the electrons belonging to the Si-H bonds do not intervene in the generation of EL.

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  1. Departamento de Física Aplicada, Universidad Autónoma de Madrid, C-12, 28049, Madrid, Spain

    J. D. Moreno, R. Guerrero-Lemus, R. J. Martín-Palma, J. M. Martínez-Duart, M. L. Marcos & J. González-Velasco

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  1. J. D. Moreno
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  2. R. Guerrero-Lemus
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  3. R. J. Martín-Palma
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  4. J. M. Martínez-Duart
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  5. M. L. Marcos
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  6. J. González-Velasco
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Moreno, J.D., Guerrero-Lemus, R., Martín-Palma, R.J. et al. FTIRS study of porous silicon at different oxidation stages. Journal of Materials Science 34, 3067–3069 (1999). https://doi.org/10.1023/A:1004688613686

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