Abstract
The combination of photoluminescence spectroscopy with the radioactive isotopes 7Be, 71As, 111Ag, 111In, 191Pt, 193Au and 197Hg is shown to provide definitive proof of the chemical identity of impurities producing photoluminescence spectra in all classes of semiconductors. The isotope 71As is used to show that radioactive isotopes can provide a powerful means of producing and studying a fundamental crystal defect such as an anti-site. Factors governing the luminescence intensities which can lead to apparently anomalous results are also discussed.
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