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Nanomaterials and Nanotechnology, Vol. 3 No. Godište 2013, 2013.

Original scientific paper

https://doi.org/10.5772/56925

Photoluminescence Studies of Li-Doped Si Nanocrystals

Eva Klimešová orcid id orcid.org/0000-0002-9569-7511 ; Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
Jirí Vacík ; Nuclear Physics Institute, Academy of Sciences of the Czech Republic, Prague, Czech Republic
Václav Holy ; Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
Ivan Pelant ; Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic

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Abstract

We investigate the optical properties of Li-doped Si nanocrystals (both freestanding and matrix-embedded), which are potentially an important material for the new generation of lithium‐ion batteries. Our samples contain 10 – 100 Li atoms per one Si nanocrystal and their lattice is slightly expanded. The photoluminescence (PL) spectra of the S‐band of Li-doped Si nanocrystals are blue‐shifted by ~30nm compared to the undoped Si nanocrystals and their PL lifetime is correspondingly shorter. The F‐band emission is almost unaffected by Li doping. The observed changes in the PL performance are probably caused by Si lattice expansion induced by Li insertion. The reported spectral blue shift is favourable for certain photonic applications.

Keywords

silicon (Si) nanocrystals; photoluminescence; doping; Li-ion batteries

Hrčak ID:

142834

URI

https://hrcak.srce.hr/142834

Publication date:

1.1.2013.

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