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Type: 
Journal
Description: 
We investigated the properties of light emitting devices whose active layer consists of Er-doped Si nanoclusters (nc) generated by thermal annealing of Er-doped SiOx layers prepared by magnetron cosputtering. Differently from a widely used technique such as plasma enhanced chemical vapor deposition, sputtering allows to synthesize Er-doped Si nc embedded in an almost stoichiometric oxide matrix, so as to deeply influence the electroluminescence properties of the devices. Relevant results include the need for an unexpected low Si excess for optimizing the device efficiency and, above all, the strong reduction of the influence of Auger de-excitation, which represents the main nonradiative path which limits the performances of such devices and their application in silicon nanophotonics.
Publisher: 
AIP
Publication date: 
1 Mar 2010
Authors: 

Alessia Irrera, Fabio Iacona, Giorgia Franzò, Maria Miritello, Roberto Lo Savio, Maria Eloisa Castagna, Salvatore Coffa, Francesco Priolo

Biblio References: 
Volume: 107 Issue: 5 Pages: 054302
Origin: 
Journal of Applied Physics