Excited states of the free excitons in CuInSe2 single crystals

M. V. Yakushev, F. Luckert, C. Faugeras, A. V. Karotki, A. V. Mudryi, R. W. Martin

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Abstract

High-quality CuInSe2 single crystals were studied using polarization resolved photoluminescence (PL) and magnetophotoluminescence (MPL). The emission lines related to the first (n=2) excited states for the A and B free excitons were observed in the PL and MPL spectra at 1.0481 meV and 1.0516 meV, respectively. The spectral positions of these lines were used to estimate accurate values for the A and B exciton binding energies (8.5 meV and 8.4 meV, respectively), Bohr radii (7.5 nm), band gaps (E-g(A)=1.050 eV and E-g(B)=1.054 eV), and the static dielectric constant (11.3) assuming the hydrogenic model.

Original languageEnglish
Article number152110
Number of pages3
JournalApplied Physics Letters
Volume97
Issue number15
DOIs
Publication statusPublished - 11 Oct 2010

Keywords

  • radiative recombination
  • optical properties
  • crystals
  • excited states
  • free excitons
  • CulnSe2
  • single crystals

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Cite this

Yakushev, M. V., Luckert, F., Faugeras, C., Karotki, A. V., Mudryi, A. V., & Martin, R. W. (2010). Excited states of the free excitons in CuInSe2 single crystals. Applied Physics Letters, 97(15), [152110]. https://doi.org/10.1063/1.3502603