Time-resolved photoluminescence study of PPV derivatives with electron - and hole - transporting moieties

Yong Hee Kim, Sae Chae Jeoung, Dongho Kim, Sung Jae Chung, Jung Il Jin

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Abstract

The decay dynamics of photoexcited poly[(2-carbazol)-p-phenylene-vinylene](PCzPV) and poly[(2-(4-biphenylyl)-5-(4-tert-butylphenyl) - 1, 3, 4 - oxadiazole) -p-phenylene- vinylene](PPPDPV) were investigated. The cw photoluminescence spectrum of PCzPV is composed of well-resolved two emission bands and a weak but apparent emission band at much lower energy. On the other hand, PPPDPV exhibits a broad and featureless emission band. The photoluminescence decay PPPDPV is almost independent of excitation energy and temperature. However, when the side chain substituent is changed to carbazole, the overall decay dynamics strongly depend on the excitation wavelength as well as temperature. The decay time constant at 580 nm of photoexcited PCzPV is shortened with a change in the excitation energy from 400 nm to 300 nm at 13 K. These results in the PCzPV and PPPDPV are interpreted in terms of the electronic properties of substituent and excimer process between substituent and main chain.

Original languageEnglish
Pages (from-to)961-962
Number of pages2
JournalSynthetic Metals
Volume102
Issue number1-3
DOIs
Publication statusPublished - 1999 Jan 1
EventProceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier
Duration: 1998 Jul 121998 Jul 18

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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