Author:
Michailovska K.V., ,Indutnyi I.Z.,Shepeliavyi P.E.,Sopinskyy M.V.,Dan’ko V.A.,Yukhymchuk V.O., , , , ,
Abstract
ncs-Si–SiO x :Sm structures formed by high-temperature air annealing of the SiO x films doped with samarium during thermal co-evaporation in vacuum of silicon monoxide and metallic Sm was studied. By measuring the spectra of photoluminescence (PL), it has been shown that doping of SiO x films with Sm stimulates their decomposition into Si and SiO 2 , and also reduces the transition temperature of silicon nanoparticle from the amorphous state to the crystalline one. With an increase in the impurity content up to 2 wt.%, along with the ncs-Si luminescence, the PL spectrum exhibits emission bands of Sm 3+ and Sm 2+ ions, which do not appear at a lower Sm concentration. The presence of silicon nanocrystals in SiO x films doped with Sm and annealed at 970 °C in air has been confirmed using Raman scattering spectra. A possible mechanism for interaction of samarium ions with the SiO x matrix and ncs-Si has been discussed.
Publisher
National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications)
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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