Investigation on relaxation dynamics of photoexcitations and spectral narrowing of photoluminescence in PPV films

Sac Chae Jeoung, Yong Hee Kim, Dongho Kim, Ja Young Han, Min Sik Jang, Hong Ku Shim

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Photoinduced absorption spectral feature as well as their temporal profiles on PPV thin film in femtosecond time regime exhibit a strong pump power density dependence. The increase in pump power density also results in the spectrally narrowed emission (SNE) band superimposed to the well-known photoluminescence from PPV. The dependencies on both pump- and probe densities denote much lower saturation intensity in photoinduced absorption as compared with that in stimulated emission from the identical primary photoexcitations, the singlet excitons. We have also discussed the nature of SNE, which has a correlation with an appearance of ultrafast decay component (τ approx. 1 ps) in temporal decay profile of the photoinduced absorption signal.

Original languageEnglish
Pages (from-to)959-960
Number of pages2
JournalSynthetic Metals
Volume102
Issue number1-3
DOIs
Publication statusPublished - 1999 Jun
EventProceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier
Duration: 1998 Jul 121998 Jul 18

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Investigation on relaxation dynamics of photoexcitations and spectral narrowing of photoluminescence in PPV films'. Together they form a unique fingerprint.

  • Cite this