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Enhanced Hole Mobility in Poly-(2-methoxy-5-(2′-ethylhexoxy)-1,4-phenylenevinylene) by Elimination of Nanometer-Sized Domains

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  • This research is supported by Academia Sinica and MOE Program for Promoting Academic Excellence of Universities (grant number 91-E-FA04-2-4A) and by National Science Council (grant number 93-2120M-002-009). We acknowledge the stimulating discussions had with Prof. A. C. Su.

Abstract

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The application of an electric field (Ecast) during solvent vaporization is shown to inhibit the formation of ordered domains in thin films of a poly(phenylenevinylene) derivative, resulting in a homogeneous environment favorable for charge transfer. An order-of-magnitude increase in charge-carrier mobility (see Figure) is achieved by the elimination of these commonly found domains.

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