Photoluminescence properties of silica aerogel/porous silicon nanocomposites
| Autor: | A. Yu. Karlash, A I Tsiganova, G V Kuznetsov, Yu E Zakharko, Valeriy A. Skryshevsky |
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| Rok vydání: | 2010 |
| Předmět: |
Nanocomposite
Photoluminescence Materials science Acoustics and Ultrasonics Silicon Analytical chemistry Nanoparticle chemistry.chemical_element Aerogel Phosphor Condensed Matter Physics Porous silicon Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering chemistry Luminescence |
| Zdroj: | Journal of Physics D: Applied Physics. 43:335405 |
| ISSN: | 1361-6463 0022-3727 |
| Popis: | The luminescent properties of nanocomposite pellets based on silica aerogel and porous Si powder are studied depending on the ratio of chemical compounds. The photoluminescence of nanocomposites is characterized by a red–orange band related to silicon nanoparticles and a blue–green band related to silica aerogel with close values of decay time and activation energy. Remarkable tuning of nanocomposites' photoluminescence spectra in the RGB region is established allowing their use as promising phosphor materials for light-emitting diodes. The outgoing spectra of pellet photoluminescence are guided by the chemical composition ratio, porous Si and silica aerogel technology, and the storage time in ambient atmosphere. It was shown that using the silica aerogel as a dielectric matrix considerably increases the stability of photoluminescence yield of silicon nanoparticles. |
| Databáze: | OpenAIRE |
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