Optical properties of Wannier excitons in closely located quantum wells in organic-inorganic layered perovskite-type compounds

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Abstract

We analyzed the optical properties of Wannier excitons in closely located quantum wells in organic-inorganic layered perovskite-type compounds. In the spectra of C n H2 n +1NH3X (n = 2, 3, or 4; X = Cl or Br), we observed absorption bands attributed to Wannier excitons. In the case of (C2H5NH3)2PbBr4, two bands were observed in the absorption and luminescence spectra. The two bands are attributed to split Wannier exciton levels arising from the interactions of closely located neighboring quantum wells. Such a split was not observed in the chloride-containing perovskite. This result indicates that the halogens in the inorganic layers have a significant effect on the interactions between the neighboring inorganic layers.

Original languageEnglish
Article number02CA01
JournalJapanese journal of applied physics
Volume57
Issue number2
DOIs
Publication statusPublished - 2018 Feb

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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