Enhancement of Luminescence in Polymer Nanocomposites
ROCHESTER UNIV NY DEPT OF CHEMICAL ENGINEERING
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The effect of supramolecular structure and morphology on the solid state luminescence of polymers is explored through a rod-coil copolymer system, polybenzobisthiazole-1,4-phenylene-co-benzobisthiazole decamethylene, which forms nanocomposites at compositions below 50 mol rods. The composition dependence of the photoluminescence quantum efficiency exhibited a sharp change corresponding to a change in supramolecular structure of the copolymers. The photoluminescence quantum efficiency of the polymer nanocomposites was as high as 37 which represents over sixfold enhancement compared to the corresponding bulk conjugated polymer. These results have implications for the fundamental understanding of the origin of luminescence quenching in conjugated polymers and they also suggest that control of supramolecular structure and morphology is key to efficient solid state luminescence in polymers.
- Organic Chemistry
- Polymer Chemistry
- Laminates and Composite Materials