Electronic and excitonic structures of inorganic-organic perovskite-type quantum-well crystal (C4H9NH3) 2PbBr4

Kenichiro Tanaka, Takayuki Takahashi, Takashi Kondo, Kenichi Umeda, Kazuhiro Ema, Tsutomu Umebayashi, Keisuke Asai, Kazuhito Uchida, Noboru Miura

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189 Citations (Scopus)


The electronic and excitonic structures of an inorganic-organic perovskite-type quantum-well crystal (C4H9NH 3)2PbBr4 have been investigated by optical absorption, photoluminescence, electroabsorption, two-photon absorption, and magnetoabsorption spectroscopies. Excitons in (C4H9NH 3)2PbBr4 are of the Wannier-type, and ns (n ≥ 2) excitons form an ideal two-dimensional Wannier exciton system. The binding energy, longitudinal-transverse splitting energy, and exchange energy of Is excitons have been determined to be 480, 70 and 31 meV, respectively. These high values originate from both a strong two-dimensional confinement and the image charge effect. These values are larger than those in (C6H 13NH3)2PbI4, owing to the smaller dielectric constant of the well layer in (C4H9NH 3)2PbBr4 than that in (C6H 13NH3)2PbI4. The seemingly unusual electric-field dependence of excitons resonance is also reasonably understood by taking the image charge effect into account.

Original languageEnglish
Pages (from-to)5923-5932
Number of pages10
JournalJapanese Journal of Applied Physics
Issue number8
Publication statusPublished - 2005 Aug 5


  • Electroabsorption
  • Image charge effect
  • Inorganic-organic perovskite-type crystal
  • Magnetoabsorption
  • Photoluminescence
  • Quantum confinement effect
  • Quantum wells
  • Two-dimensional excitons
  • Two-photon absorption
  • Wannier excitons


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