Diffuse reflectance spectra (ρλ) in the range of 0.2−2.5 μm and their changes after modification of micron-sized zinc oxide mZnO powders with nZnO nanopowders of various concentrations have been investigated. A decrease in the reflection coefficient (ρ) in the region of 0.40–1.0 μm and its increase in the region of 1.0–2.5 μm in modified mZnO/nZnO powders have been established. It is shown that a decrease in the reflection coefficient is determined by an increase in the concentration of intrinsic point defects. The increase in the reflection coefficient is determined by two factors: an increase in the concentration of free electrons and an increase in the scattering coefficient due to a change in the granulometric composition of the modified powders. A mechanism for the formation of granules in nanoparticle-modified powders has been proposed.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 8, pp. 3–9, August, 2022.
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Mikhailov, M.M., Lapin, A.N., Yuryev, S.A. et al. Optical Properties of ZnO Powders Modified with ZnO Nanoparticles. Russ Phys J 65, 1239–1245 (2022). https://doi.org/10.1007/s11182-023-02757-y
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DOI: https://doi.org/10.1007/s11182-023-02757-y