| Zugriffsnummer | 20536 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Long-lasting photoluminescence in polymers |
| Autor(in); Institution |
Peik, Ekkehard; 4.4, Zeit und Frequenz, PTB-Braunschweig
|
| Quelle/Jahr | Journal of Physics D: 40 (2007), 3330 - 3334 |
| ISSN | 0022-3727 |
| DOI | |
| Verlag | Bristol: IOP Publishing Ltd. |
| Zusammenfassung | Several solid polymers of technical importance such as polytetrafluoroethylene, polyvinylidenefluoride, ethylene-tetrafluoroethylene-copolymer, polyetheretherketone and polypropylene show a long-lasting, spectrally broad luminescence after irradiation with ultraviolet light of low intensity. With a sensitive photo detection system the luminescence decay is registered for several hours. The decay curves can be approximated by an inverse power law with fractional exponent, partly showing a pronounced temperature dependence. Qualitatively, the luminescence emission can be understood as arising from a radiative recombination of trapped charges that diffuse under thermal activation. |
