Ultrafast photoluminescence from (C6H5C2H4NH3)2PbI4

T. Fujita, H. Nakashima, M. Hirasawa, T. Ishihara

Research output: Contribution to journalConference articlepeer-review

23 Citations (Scopus)


We report on ultrafast radiative exciton lifetime of (C6H5C2H4NH3)2PbI4 (PhE-PbI4 for short) film, which is one of the inorganic-organic PbI-based layered perovskite semiconductors with large exciton-oscillator strength. The radiative lifetime of excitons in 20-nm-thick polycrystalline film was found to be very short, approx. 10 ps through time-resolved photoluminescence (PL) measurements. In addition, we propose a new scheme for ultrafast PL in order to circumvent the loss of coherent volume of an exciton center-of-mass wave function due to the exciton scattering: a periodic structure of thin PhE-PbI4 rods in a slab waveguide. Under the strong coupling between an exciton and a Bragg mode, we expect that the macroscopic coherence will be maintained even at room temperature along with the ultrafast PL with lifetime of a few ps or less.

Original languageEnglish
Pages (from-to)847-849
Number of pages3
JournalJournal of Luminescence
Publication statusPublished - 2000 May
Externally publishedYes
EventInternational Conference on Luminescence and Optical Spectroscopy of Condensed Matter (ICL'99) - Osaka, Jpn
Duration: 1999 Aug 231999 Aug 27

ASJC Scopus subject areas

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


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