Abstract
We report time-resolved measurements of photoluminescence in poly(p-phenylenevinylene) (PPV) and related polymers, using the technique of time-correlated single photon counting. We find the photoluminescence is longer lived in less-conjugated samples, and that this accounts for the higher efficiency of light-emitting devices made from less-conjugated materials. At low temperatures, the luminescence is longer lived, and at 77 K there is an interesting red shift of the emission during the first nanoseconds after photoexcitation. We consider that this arises from migration of excitons to more-conjugated (and therefore lower energy) regions of the sample.
| Original language | English |
|---|---|
| Pages (from-to) | 281-288 |
| Number of pages | 8 |
| Journal | Synthetic Metals |
| Volume | 54 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - Mar 1 1993 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Polymers and Plastics
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Samuel, I. D. W., Crystall, B., Rumbles, G., Burn, P. L., Holmes, A. B., & Friend, R. H. (1993). Time-resolved luminescence measurements in poly(p-phenylenevinylene). Synthetic Metals, 54(1-3), 281-288. https://doi.org/10.1016/0379-6779(93)91071-9