High mobility polymer thin-film transistors with capillarity-mediated self-assembly

摘要

Embodiments of the invention include methods and materials for preparing organic semiconducting layers, for example one used in an organic semiconductor device including a substrate with a nanostructured surface and a polymeric semiconductor film overlying the nanostructured surface. Aspects of the invention use capillary action to modulate polymer chain self-assembly on a surface and unidirectional alignment at a critical buried interface where charge carriers migrate between a dielectric and the polymer. By controlling the properties of the surfaces upon which polymers are disposed, artisans can enhance the transistor saturated mobilities of conjugated polymers.

主权项

1. A method of using capillary action to form a composition comprising a plurality of aligned polymer fibers, the method comprising:
depositing a solution comprising polymers onto a first substrate, wherein:
the first substrate comprises a first spacer; andat least one surface of the first substrate and/or spacer has been treated so as to modulate the capillary action of the solution in contact with the first substrate and/or spacer; allowing capillary action to modulate the flow of the solution contacting the first substrate and/or spacer; and evaporating the solution, wherein the evaporation rate is controlled so as to be not more than 0.25 μL/min; so that a composition comprising a plurality of aligned polymer fibers is formed.