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Complex Defect Formation in Heat Treated Aluminium Doped Cz Silicon

Published online by Cambridge University Press:  26 February 2011

Andrew C. T. Drakeford
Affiliation:
Physics Department, King's College London, Strand, London WC2R 2LS, UK
Edward C. Lightowlers
Affiliation:
Physics Department, King's College London, Strand, London WC2R 2LS, UK
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Abstract

Resistivity and photoluminescence measurements have been made on Al-doped CZ Si, with high and with low C concentrations, heat treated at 450°C. The results are compared with those obtained from nominally undoped CZ Si with a low residual B concentration. It is shown that Al acceptors are completely lost, presumably by the removal of Al from substitutional sites by exchange with Si self interstitials generated during oxygen aggregation. Luminescence features observed are tentatively identified with electronic transitions at neutral Al-C and Al-thermal donor complexes.

Type
Research Article
Copyright
Copyright © Materials Research Society 1988

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