Title :
Light emission in phase separated conjugated and non-conjugated polymer blends
Author :
Shen-Yi Hsu ; Hsieh-Li Chou ; Wei, Pei-Kuen
Author_Institution :
Inst. of Appl. Sci. & Eng. Res., Acad. Sinica, Taipei, Taiwan
Abstract :
Phase separations in conjugated polymer (MEH-PPV) and non-conjugated polymer (PMMA) are studied by a near-field scanning microscopy and spectroscopy. Micron scale binary decomposition without photoluminescence spectrum shift occurs when the blending ratio (MEH-PPV/PMMA) is larger than one. When the ratio is smaller, the film becomes homogeneous and an ∼100 nm blue shift of PL spectrum happened. The new PL spectrum indicates the excitons in MEH-PPV chains are interrupted by the PMMA, and thus emitting light as PPV oligomers.
Keywords :
decomposition; near-field scanning optical microscopy; phase separation; photoluminescence; polymer blends; polymer films; spectral line shift; MEH-PPV; PL spectrum; PMMA; PPV oligomers; blending ratio; blue shift; conjugated polymer; micron scale binary decomposition; near-field scanning microscopy; near-field scanning spectroscopy; nonconjugated polymer; phase separations; polymer blends; Electroluminescence; Laser excitation; Light emitting diodes; Microscopy; Organic light emitting diodes; Photoluminescence; Plastic insulation; Polymer films; Spectroscopy; Voltage;
Conference_Titel :
Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on
Print_ISBN :
0-7803-7766-4
DOI :
10.1109/CLEOPR.2003.1277262
