Abstract
A semi-quantitave model describing the influence of interfaces and stress fields on {113}-defect generation in silicon during 1-MeV electron irradiation, is further developed to take into account also the role of extrinsic point defects. It is shown that the observed distribution of {113}-defects in high-flux electron-irradiated silicon and its dependence on irradiation temperature and dopant concentration can be understood by taking into account not only the influence of the surfaces and interfaces as sinks for intrinsic point defects but also the thermal stability of the bulk sinks for intrinsic point defects. In heavily doped silicon the bulk sinks are related with pairing reactions of the dopant atoms with the generated intrinsic point defects or related with enhanced recombination of vacancies and self-interstitials at extrinsic point defects. The obtained theoretical results are correlated with published experimental data on boron-and phosphorus-doped silicon and are illustrated with observations obtained by irradiating cross-section transmission electron microscopy samples of wafers with highly doped surface layers.
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Vanhellemont, J., Romano-Rodríguez, A. On the influence of extrinsic point defects on irradiation-induced point-defect distributions in silicon. Appl. Phys. A 58, 541–549 (1994). https://doi.org/10.1007/BF00348164
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DOI: https://doi.org/10.1007/BF00348164