Abstract
The photoluminescence and photoluminescence excitation spectra for Zn1−x Mn x O nanocrystals are presented. After annealing of powders in air, the intensity of the bands attributable to manganese decreases noticeably. This suggests that the oxygen vacancies affect the Zhang-Rice-like states appearing due to strong d-p-hybridization, which is confirmed by an increase in the band gap of Zn1−x Mn x O for low x. The origin of the 2.9-eV peak and the shape of its excitation spectrum are discussed qualitatively. For Zn1−x Mn x O nanocrystals, the shape of the excitation spectrum is as unusual as the intense absorption in the range (2.2–3.0) eV.
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Original Russian Text © N.B. Gruzdev, V.I. Sokolov, A.E. Ermakov, M.A. Uimin, A.A. Mysik, V.A. Pustovarov, 2010, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2010, Vol. 138, No. 2, pp. 261–265.
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Gruzdev, N.B., Sokolov, V.I., Ermakov, A.E. et al. Excitons and photoluminescence in ZnO and Zn0.99Mn0.01O nanocrystals. J. Exp. Theor. Phys. 111, 231–235 (2010). https://doi.org/10.1134/S1063776110080121
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DOI: https://doi.org/10.1134/S1063776110080121