| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5404403 | Journal of Luminescence | 2006 | 7 Pages |
Abstract
The polymer-polymer interaction of poly[2-methoxy-5-(2â²-ethylhexyloxy)-1,4-p-phenylenevinylene] (MEH-PPV) in blends with polystyrene (PS) was studied. Photoluminescence spectra of blend films present a new well-resolved peak at 10Â K, which appears at lower wavelengths, being associated to an intrachain transition. The emission line shape of MEH-PPV/PS blends was analyzed using a molecular exciton theory, supposing two radiative processes, allied to non-localized (aggregate states) and localized (intrachain) transitions. The temperature dependence of the intrachain transition shows an energy transfer process from localized to non-localized state above 180Â K. The electronic structure based on the experimental results is discussed and the electronic-vibrational coupling parameter (Huang-Rhys factor) of MEH-PPV/PS blend was obtained.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Alexandre Marletta, Vanessa C. Gonçalves, Débora T. Balogh,