| 초록 |
As a result of the quasi-one-dimensional transport pathways of charge carriers along the backbone, charge transport in polymer semiconductors is limited by their nano-morphology. Structural disorders arising from the high degree of conformational freedom of polymer chains lead to electronic localization. Thus, highly oriented polymer packing is needed for achieving minimized structural disorder and associated high mobility in semiconducting polymers. We show that highly oriented semiconducting polymers can be obtained by directed self-assembly onto nano-grooved substrates. The oriented polymer thin films along nano-grooves in the substrate exhibited strong anisotropy, implying the possibility of achieving high mobility along the polymer backbone. With semiconducting polymers aligned and oriented on nano-grooved polymer substrates, we have demonstrated high-performance polymer field-effect transistors with enhanced mobilities fabricated onto rigid and flexible substrates. |
