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Influence of carbon on erbium lattice location inSi:Er

Published online by Cambridge University Press:  17 March 2011

X. T. Ren  and
M. B. Huang
X. T. Ren
Affiliation:
Department of Physics, University at Albany, State University of New York, Albany, NY 12222
M. B. Huang
Affiliation:
Department of Physics, University at Albany, State University of New York, Albany, NY 12222
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Abstract

The 1.5 µm luminescence from Si:Er is known to strongly depend on impurities(e.g. carbon) in silicon. In this work, we investigate the effect of carbonco-doping on the lattice location of Er atoms in Si by Rutherfordbackscattering(RBS)/channeling techniques. A float-zone (FZ) Si (100) waferwas first amorphized to a depth of ~ 0. 3 µm by Si ions implanted to a doseof ~ 1×1015cm2 at liquid nitrogen temperature. Carbonions were then implanted into the amorphous silicon, which wasrecrystallized via solid phase epitaxial growth (SPEG) at 600°C following Cimplant. Finally Er ions were implanted into the C-doped and C-free Sicrystals, with the substrate temperature at 25°C and 300°C respectively. TheRBS/channeling results show that the Er redistribution and Si crystallinityare strongly affected by C co-doping. The incorporation of C into Si cansignificantly suppress Er surface segregation, and modify the latticelocation of Er atoms in Si. We discuss these effects in terms of theformation of Er-C defect complexes.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 647: Symposium O – Ion Beam Synthesis & Processing of Advanced Materials , 2000 , O11.28
Copyright
Copyright © Materials Research Society 2001

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