Photophysics of poly(p-phenylene vinylene) films
AUTOR(ES)
Anni, M., Gigli, G., Cingolani, R., Gobato, Y. Galvão, Vercik, A., Marletta, A., Guimarães, F.G. E., Faria, R. M.
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2004-06
RESUMO
We report on time resolved photoluminescence (PLRT) measurements in poly(p-phenylene vinylene) (PPV) films irradiated by laser in the presence of air. We observe a PL intensity enhancement and a biexponential decay dynamics of PL signal for all irradiated films. These results can be understood in terms of a chain shortening process due to carbonyl incorporation and formation of an energy profile that extends and migrates into the film and enables efficient spectral diffusion of excited carriers to a non-degraded PPV segments by Förster energy transfer.
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