Abstract
The application of phase-modulation infrared spectroscopy to the photoexcitation dynamics of conjugated polymers is described. The modulation-frequency dependencies of the intensity and phase delay of photoinduced absorption have been observed and simulated numerically on the basis of a model based on second-order kinetics involving a neutralization process between the positive and negative charge carriers (polarons) that are formed from a photogenerated interchain charge-transfer exciton (polaron pair). The rate constant of the bimolecular recombination process has been obtained. This numerical simulation is useful in analyzing the observed responses of a nonlinear system in the phase-modulation measurements.
| Original language | English |
|---|---|
| Pages (from-to) | 77-83 |
| Number of pages | 7 |
| Journal | Vibrational Spectroscopy |
| Volume | 19 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1999 Feb |
| Event | Proceedings of the 1998 3rd International Symposium on Advanced Infrared and Raman Spectroscopy, AIRS III - Vienna, Austria Duration: 1998 Jul 5 → 1998 Jul 9 |
Keywords
- Conjugated polymers
- Phase-modulation infrared spectroscopy
- Photoexcitation dynamics
ASJC Scopus subject areas
- Spectroscopy