Abstract
The ultra-small field induced magnetoconductance (MC) responses in Supper Yellow Poly(phenylenevinylene) (SY-PPV):Phenyl-C61-butyric acid methyl ester (PCBM) blends have been investigated to clarify the role of competition ratio by changing the dissociation rate. It is found that the widths of the ultra-small field induced MC curves broaden from 0.4mT (0wt.%) to 1.9mT (4wt.%). The characteristics of electroluminescence-voltage suggest that the width broaden is assigned to an increase in the competition ratio induced by an increase in the dissociation rate when PCBM is blended. This conclusion is further verified by an empirical formula fitting.
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