Understanding the relationship between charge transport and morphology is critical for improving the efficiency of conjugated polymer–based devices. Time of flight measurements are used here to examine hole transport in films of poly(2-methoxy-5-(2′-ethylhexoxy)-1,4,-phenylene vinylene) (MEH-PPV). Films cast from three different solvents, toluene, p-xylene, and chlorobenzene, are investigated. It is shown that the MEH-PPV films can exhibit either non-dispersive or dispersive transport, depending on the solvent used.
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Inigo et al. (2001) studied this question.
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