Abstract
ABSTRACTWe detect new luminescence lines in Czochralski-grown silicon after prolonged heat treatments at 450°C. The properties of the new optical transition are well explained by a thermal donor-free hole recombination. From the IR-absorption spectra measured on the same samples, we have evidence for an inhomogeneous distribution of the thermal donors. The spatial fluctuations of the thermal donors appear to be necessary for the new luminescence spectrum to emerge.
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