Visible Light-Emitting Hydrogenated Nanocrystalline Silicon-on-Insulator Films: Formation and Properties

Ida E. Tyschenko; Vladimir A. Volodin

doi:10.4028/www.scientific.net/SSP.178-179.453

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HomeSolid State PhenomenaSolid State Phenomena Vols. 178-179Visible Light-Emitting Hydrogenated...

Visible Light-Emitting Hydrogenated Nanocrystalline Silicon-on-Insulator Films: Formation and Properties

Abstract:

Hydrogenated Si nanocrystals were performed by high-dose (51017 cm-2) low-energy (24 keV) H+ ion implantation of silicon-on-insulator (SOI) layers. The formation of the nanocrystalline phase was observed in the as-implanted samples and in those annealed at the temperature of 200-400o C. Both the Raman shift and the broadening of the phonon peak corresponded to Si nanocrystals with the diameters ranging from ~2 to ~3 nm. The room-temperature photoluminescence (PL) peaked at 1.58 - 1.64 eV was observed at room temperature. The PL peak energy corresponded to the energy of quantum confined exciton in the Si nanocrystals with the diameters mentioned above. The PL intensity had the bell-shaped dependence on the measurement temperature and had its maximum near 150 K. The estimated thermal activation energy of the PL was about 12.1 meV and was in good accordance with the singlet-triplet splitting energy of the exciton states.

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Solid State Phenomena (Volumes 178-179)

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453-458

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https://doi.org/10.4028/www.scientific.net/SSP.178-179.453

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Online since:

August 2011

Authors:

Ida E. Tyschenko, Vladimir A. Volodin

Keywords:

Amorphous Silicon, Hydrogen, Ion Implantation, Nanocrystal, Silicon-on-Insulator (SOI), Visible Photoluminescence

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