| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5191662 | Polymer | 2005 | 4 Pages |
Abstract
Phase separations in conjugated polymer (MEH-PPV) and non-conjugated polymer (PMMA) blended films are studied by photoluminescent (PL) near-field scanning optical microscope and spectrometer. The morphologies of blended films changed from stripe patterns to isolated islands as PMMA concentrations increased. The PL spectra in isolated micron dots are the same as MEH-PPV. Nevertheless, we found new PL spectra, peaked at 500Â nm wavelength, in the PMMA matrix. Since, PMMA does not emit light, the new spectra indicate some MEH-PPV diluted in the PMMA rich regions. The excitons of MEH-PPV in the PMMA matrix are localized and emit light as PPV oligomers.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Hsieh-Li Chou, Shen-Yi Hsu, Pei-Kuen Wei,