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Erschienen in:
01.07.2011 | Original Paper
Stabilization of bulk aggregation state in semiconducting polymer solutions
Erschienen in: Journal of Polymer Research | Ausgabe 4/2011
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Abstract
Stabilization of the aggregation state in semiconducting conjugated polymer solutions during sample preparation or flow processing, such as spin coating or ink-jet printing, is crucial to warrant controllable thin-film properties for applications with polymer-based light emitting diodes (PLED). Flow-turbidity measurements on the solutions made of a widely studied conjugated polymer revealed, for the first time, that flow could result in instant and/or persistent changes in the bulk aggregation state. Current observations, nevertheless, suggested that a combination of moderately high polymer concentration and intermediately poor solvent quality can substantially stabilize the aggregation state at the stages of sample preparation, prolonged storage, and flow processing.