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Absorption spectrum of thin K2CdI4 films

  • Semiconductors and Dielectrics
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Abstract

The absorption spectrum of thin films of a new compound, K2CdI4, was studied. It was established that this compound belongs to direct-bandgap dielectrics and that its low-frequency electronic and excitonic excitations are localized in CdI 2−4 structural blocks of the crystal lattice. It was found that, in M 2CdI4 compounds (M = K, Rb, Cs), the bandgap width E g grows and the spin-orbit splitting of the valence band top decreases with increasing ionic radius of the alkali metal.

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Authors and Affiliations

  1. Kharkov National University, pl. Svobody 4, Kharkov, 61077, Ukraine

    O. N. Yunakova & V. K. Miloslavskii

  2. Kharkov National University of Radioelectronics, Kharkov, 61166, Ukraine

    E. N. Kovalenko

Authors
  1. O. N. Yunakova
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  2. V. K. Miloslavskii
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  3. E. N. Kovalenko
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__________

Translated from Fizika Tverdogo Tela, Vol. 47, No. 3, 2005, pp. 460–462.

Original Russian Text Copyright © 2005 by Yunakova, Miloslavski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \), Kovalenko.

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Yunakova, O.N., Miloslavskii, V.K. & Kovalenko, E.N. Absorption spectrum of thin K2CdI4 films. Phys. Solid State 47, 474–476 (2005). https://doi.org/10.1134/1.1884707

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  • DOI: https://doi.org/10.1134/1.1884707

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