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- W2046509364 abstract "Polymer-fullerene bilayer heterostructures are suited to study excitonic processes in conjugated polymers. Excitons are efficiently quenched at the polymer-fullerene interface, whereas the polymer-vacuum interface is often considered as an exciton-reflecting interface. Here, we report about efficient exciton quenching close to the polymer-vacuum interface of spin-coated MDMO-PPV (poly[2-methoxy-5-(2'-ethyl-hexyloxy)-p-phenylenevinylene]) films. The quenching efficiency is estimated to be as high as that of the polymer-fullerene interface. This efficient quenching is consistent with enhanced intermolecular interactions close to the polymer-vacuum interface due to the formation of a skin layer during the spin-coating procedure. In the skin layer, the polymer density is higher; that is, the intermolecular distances are shorter than in the rest of the film. The effect of exciton quenching at the polymer-vacuum interface should be taken into account when the thickness of the polymer film is on the order of the exciton diffusion length; in particular, in the determination of the exciton diffusion length." @default.
- W2046509364 created "2016-06-24" @default.
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- W2046509364 date "2009-06-15" @default.
- W2046509364 modified "2023-09-26" @default.
- W2046509364 title "Exciton Quenching Close to Polymer−Vacuum Interface of Spin-Coated Films of Poly(<i>p</i>-phenylenevinylene) Derivative" @default.
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- W2046509364 doi "https://doi.org/10.1021/jp9012637" @default.
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