Abstract
Experimental evidence is presented that photoinduced defect reactions in ZnSe{Ag} crystals give rise to the formation of (Ag0 i)2 interstitial donor pairs. As a result, the induced impurity photoconductivity spectrum shows, along with the band at 0.29 eV due to isolated Ag0 i atoms, a series of narrow bands in the range 0.3–0.6 eV (quasi-line spectrum). The energy positions and relative intensities of these bands are accounted for in terms of different pair separations in (Ag0 i)2 . The charge instability of Agi under band-gap excitation, associated with multiple electron trapping processes, leads to atomic instability, which gives rise to ionization-enhanced diffusion and the formation of (Ag0 i)2 donor pairs.
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Rizakhanov, M.A., Khamidov, M.M. & Emirov, Y.N. Photogeneration of Donor Pairs in ZnSe{Ag} Crystals. Inorganic Materials 36, 1200–1202 (2000). https://doi.org/10.1023/A:1026617328176
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DOI: https://doi.org/10.1023/A:1026617328176