Abstract
Sub-picosecond spectroscopy and ultrafast pump-probe experiments spectrally and temporally resolve the Forster energy transfer in blends from larger gap host to the smaller gap guest organic materials. The dynamics of the stimulated emission and photoinduced absorption of the polymer blends indicate that 1020 ps are required for complete energy transfer. The Forster interaction ranges suggested by quantitative measurements of energy transfer rates are compared with the theoretical values as calculated from the spectral overlap. We discuss the effect of the excited state delocalization. The energy transfer dynamics in small organic molecule blends have a longer time scale (1 ns), corresponding to the much longer lifetimes of the organic dyes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 38-46 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3797 |
| State | Published - 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1999 Organic Light-Emitting Materials and Devices III - Denver, CO, USA Duration: Jul 19 1999 → Jul 21 1999 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering