John G. Labram, James Kirkpatrick, Donal D. C. Bradley and Thomas D. Anthopoulos Impact of Fullerene Molecular Weight on P3HT:PCBM Microstructure Studied Using Organic Thin-Film Transistors Advanced Energy Materials 1
The diffusion and clustering of PC61BM and PC71BM in P3HT has been studied using bilayer organic field-effect transistors and atomic force microscopy (AFM). The prerequisite annealing temperature for PC71BM diffusion in P3HT was observed to be higher than that of PC61BM. AFM images suggest that in this system the diffusion of PC71BM in P3HT does not take place homogeneously throughout the film.
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