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Photoluminescence of porous silicon stain etched and doped with erbium and ytterbium

✍ Scribed by B. Díaz-Herrera; B. González-Díaz; R. Guerrero-Lemus; C. Hernández-Rodríguez; J. Méndez-Ramos; V.D. Rodríguez

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 560 KB
Volume: 41
Category: Article
ISSN: 1386-9477
DOI: 10.1016/j.physe.2008.09.015

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## Abstract Stain etching of silicon in aqueous solutions composed of FeCl~3~ + HF + concentrated (HClO~4~ or H~2~SO~4~) leads to highly luminescent porous Si with a unique dual layer structure. The upper layer (∼3 μm thick) exhibits bluer luminescence (peaked at 560–590 nm) and a porosity in exces