Optoelectronic effect of porous silicon surface treatment with samarium ions for different deposition times and characterizations

Zarroug, Ahmed; Bouznif, Zouheir; Hamed, Zied Ben; Derbali, Lotfi; Ezzaouia, Hatem

doi:10.1007/s00170-017-0600-y

Cited by 6 publications

(1 citation statement)

References 31 publications

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“…The blue shift of the PL peak position, i.e. the increase in the band gap of the PSi/Co samples, could be resulted from the oxygen atoms forming cobalt oxide compounds at the PSi/Co interface for short deposition times [28][29][30]. On the other hand, observed redshift in the PL spectra of PSi/Co samples with increasing deposition time, has arisen from the clustering Co nanoparticle on the surface which causes an increase in the number of non-radiative centers [31,32].…”

Section: Photoluminescence Analysesmentioning

confidence: 99%

Effect of the synthesis conditions on the properties of Co embedded porous Si nanostructures

Çetinel

Artunç

Tarhan

2019

Materials Science and Engineering: B

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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 l > 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. how structural, morphological and PL properties of PSi/Co nanostructures vary with the Co nanoparticles deposited via the

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