Abstract
The absorption spectra and photo-and dark conductivity of the CdI2-PbI2 system are investigated in the temperature range 4.2–300 K. The temperature dependence of the photoluminescence and the IR stimulation spectra of luminescence and induced photoconductivity at 4.2 K are also studied. The results are interpreted by considering microphase inclusions of PbI2 into the CdI2 crystal lattice as activator centers. An energy-level diagram in which the narrow band of the PbI2 microphase genetically related to the metastable 3P0 level of lead plays a significant role is presented for this crystal system.
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