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 language | English |
|---|---|
| Pages (from-to) | 961-962 |
| Number of pages | 2 |
| Journal | Synthetic Metals |
| Volume | 102 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 1999 |
| Event | Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier Duration: 1998 Jul 12 → 1998 Jul 18 |
Bibliographical note
Funding Information:This work has been financially supported by Creative Research Initiatives (DK) and Star Project (SCJ) of the Ministry of Science and Technology of Korea and the Korea Science and Engineering Foundation (JIJ).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry