Visible luminescence of nanosized polysilane photoconductors, incorporated into mesoporous silica

N. Ostapenko, N. Kotova, V. Lukashenko, G. Telbiz, S. Suto, A. Watanabe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The dependence of the low-temperature (5-150 K) photoluminescence spectra of poly(di-n-hexylsilane) (PDHS) incorporated into mesoporous silicas on sizes and a geometry of pores was investigated. It was shown that visible luminescence in nanosized PDHS is observed only when the polymer is incorporated into the hexagonal pores of 2.8 nm in diameter, but it is absent for the bulk film, dissolved polymer, and polymer incorporated into cubic pores of 2.8 nm in diameter or into hexagonal pores of 5.8 nm in diameter. We suggest that the appearance of visible luminescence in nanosized PDHS is connected with the transition from electronic states localized on the conformational defect of the polymer chain.

Original languageEnglish
Pages (from-to)149-156
Number of pages8
JournalMolecular crystals and liquid crystals
Volume426
DOIs
Publication statusPublished - 2005

Keywords

  • Conformational defects
  • Mesoporous silica
  • Nanosized composites
  • Photoluminescence
  • Poly(di-n-hexylsilane)
  • Size and geometry of the pore
  • X-ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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