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Photoluminescence and structural defects in erbium-implanted silicon annealed at high temperature

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6 Author(s)
Sobolev, N.A. ; Ioffe Physicotechnical Institute, St. Petersburg 194021, Russia ; Gusev, O.B. ; Shek, E.I. ; Vdovin, V.I.
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The behavior of luminescence spectra and structural defects in single crystal Czochralski silicon after erbium implantation at 1 MeV energy and 1×1013cm-2 dose with subsequent annealing at 1100 °C for 0.25–3 h in an argon or chlorine-containing ambience was studied by photoluminescence (PL), transmission electron microscopy, and chemical etching/Nomarski microscopy. We have found that annealing in the chlorine-containing ambience gives rise to dislocation loops and pure edge dislocations with dominant dislocation-related lines in the PL spectrum. Pure edge dislocations are responsible for the appearance of the lines. The Er-related lines due to the intra-4f shell transitions in the rare-earth ions dominate in the PL spectra and no structural defects are observed after annealing in argon. The observed differences in the optical and structural properties of Si:Er are associated with intrinsic point defects generated during the implantation and annealing. © 1998 American Institute of Physics.

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Applied Physics Letters  (Volume:72 ,  Issue: 25 )