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Published online by Cambridge University Press: 25 February 2011
Complex defects in semiconductors are briefly reviewed, with emphasis on the electronic structure. Classes of such defects with a varying degree of complexity are discussed, with reference to recent optical data for neutral defects in GaP and silicon. These include PGa-antisite related substitutional complexes in GaP, Gai-acceptor complexes in GaP, substitu-tional chalcogen complex defects in silicon and vacancy-impurity complexes in silicon.