Exciton dynamics and hidden structures of poly(di-n-hexylsilane) film: Experimental and theoretical study

Shozo Suto, Makoto Shimizu, Takenari Goto, Akira Watanabe, Minoru Matsuda

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We report here the measurements of the absorption spectra, photoluminescence spectra and the time response of the luminescence intensity in poly(di-n-hexylsilane) film at 2 K. The excitation energy dependence of the luminescence peak and the rise time of 70 ps are observed. In order to explain these results, numerical diagonalization of a one-dimensional Frenkel exciton Hamiltonian with disorder has been carried out, and the luminescent process is formulated with the assumption that the exciton does not change the site by phonon scattering. We have estimated the transition dipole moment μ0 = 0.92 × 10 -29 C m and the transition time ctr = 1.2 × 1012 s-1. We also discuss the role of hidden structures at the low-lying exciton states which appear in the site representation of exciton wave functions.

Original languageEnglish
Pages (from-to)486-490
Number of pages5
JournalJournal of Luminescence
Volume76-77
DOIs
Publication statusPublished - 1998 Feb

Keywords

  • Exciton dynamics
  • Frenkel exciton
  • Photoluminescence
  • Poly(di-n-hexylsilane)

ASJC Scopus subject areas

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

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