Room-temperature optical transmission measurements in the photon energy range 0.5-6 eV have been made on evaporated thin films of the semiconducting layered structures PbI 2 and BiI 3 during intercalation with hydrazine (N 2 H 4 ). After intercalation, the optical absorption edge shifts to higher energies by approximately 1 eV for PbI 2 , while for BiI 3 the shift is greater than 3 eV. The process is reversible. Unlike the case of the semiconducting transition-metal dichalcogenides, intercalation does not appear to introduce free carriers to the host lattice.
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Ghorayeb et al. (1984) studied this question.
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