Ionodeterioration of the silicon nanocrystal photoluminescence
作者： J. Demarche , D. Barba , G. G. Ross , G. Terwagne
DOI: 10.1063/1.3665034
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摘要: The photoluminescence (PL) of Si nanocrystals (Si-nc) embedded in fused silica has been investigated under simultaneous excitations by laser and low energy proton beam. Ionodegradation the sample, characterized a rapid decrease spectral blueshift PL emission observed. These effects are associated with creation non-radiative centers Si-nc. Micro-Raman spectroscopy analysis shows that beam not changed average size Si-nc, but disturbed fraction Si-Si bonds inside which is consistent both simulations direct measurements. A post-annealing performed at 400 °C for 1 h can restore structural properties only part their nominal intensity recovered. Characterization damage induced irradiation reported this paper makes use light ion beams relevant experimental investigation nanostructured systems, such as ionoluminescence
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