Optical properties of PbI-based perovskite structures

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299 Citations (Scopus)

Abstract

Remarkable enhancement of the excitonic binding energy and oscillator strength is demonstrated in PbI-based layered perovskite compounds where quantum well layers of corner sharing PbI6 octahedra are sandwiched by alkylammonium barrier layers with a much smaller dielectric constant. The enhancement is quantitatively explained by the image charge effect. By changing the dimensionality of PbI6 networks, we observe a change in the exciton formation energy from 1.633 eV for three-dimensional networks to 342 eV for zero-dimensional isolated octahedra. This change is mainly ascribed to the quantum confinement effect.

Original languageEnglish
Pages (from-to)269-274
Number of pages6
JournalJournal of Luminescence
Volume60-61
Issue numberC
DOIs
Publication statusPublished - 1994 Apr

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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