Abstract
We discuss the stages of the luminescence processes in substituted and soluble poly(thiophenes), using results from determinations of absolute quantum yields of photoluminescence, fast pump-probe experiments and microcavity devices. Enhancement of the quantum yield of photoluminescence, with poly(thiophenes) in the solid state, call be obtained by dispersing the conjugated chain in a molecularly dispersed polymer blend, or by adding side chains designed for forcing the conjugated main chains apart. At the wavelength of stimulated emission, we observe a narrow bandwidth emission in the high-Q one-dimensional microcavity devices prepared by sandwiching two dielectric mirrors around a thin polymer film, A strong enhancement of the power efficiency is observed at a pump power of 1 mu W/cm(2), but does not conclusively show lasing characteristics. (C) 1998 Elsevier Science B.V.
| Original language | English |
|---|---|
| Pages (from-to) | 104-108 |
| Number of pages | 5 |
| Journal | Optical Materials |
| Volume | 9 |
| Issue number | 1-4 |
| Publication status | Published - Jan 1998 |
| Event | Symposium M on Materials, Physics and Devices for Molecular Electronics and Photonics of the 1997 Annual Meeting of the European Materials Research Society - STRASBOURG, France Duration: 16 Jun 1997 → 19 Jun 1997 |
Keywords
- LIGHT-EMITTING-DIODES
- POLYMER
- MICROCAVITIES
- FILMS