Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/9064
Title: Effect of the synthesis conditions on the properties of Co embedded porous Si nanostructures
Authors: Çetinel, Alper
Artunç, Nurcan
Tarhan, Enver
Keywords: Porous silicon
Cobalt nanoparticles
Electrodeposition
Photoluminescence
Passivation
Publisher: Elsevier Ltd.
Abstract: The electrodeposition of cobalt in the porous silicon (PSi) substrate was investigated in terms of the deposition times and current densities. The PSi/Co samples were characterized by SEM, XRD, Raman, and photoluminescence (PL) spectroscopies. The results indicated that for all current densities, the PL intensities of PSi/Co samples with shorter deposition times (t(s) <= 20 min) increased due to spherical Co nanoparticles (NPs) could be created the new recombination centers, compared to that of the undeposited PSi. On the other hand, the PL intensity of PSi/Co samples significantly decreased at longer deposition times (t(1) > 20 min) because of larger Co NP cluster promoted the formation of non-radiative centers. The increased PL intensities in samples with t(s) were attributed to both the quantum confinement effect and surface effects. PL analyses also suggested that after exposure to air for 60 days, PL characteristics of PSi/Co were stabilized depending on deposition time and current density.
URI: https://doi.org/10.1016/j.mseb.2019.04.008
https://hdl.handle.net/11147/9064
ISSN: 0921-5107
1873-4944
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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