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Light emission in phase separated conjugated and non-conjugated polymer blends

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3 Author(s)
Shen-Yi Hsu ; Inst. of Appl. Sci. & Eng. Res., Acad. Sinica, Taipei, Taiwan ; Hsieh-Li Chou ; Pei-Kuen Wei

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.

Published in:

Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on  (Volume:2 )

Date of Conference:

15-19 Dec. 2003