| 초록 |
Organic semiconductors have made great progress during the last decade as key components of numerous electronic and optoelectronic devices with various applications, including photovoltaic cells, light-emitting diodes, and organic field-effect transistors (OFETs). We investigate the effect of phase-separated dielectric nanostructures of polyvinylcyclohexane-b-polyethylene-b-polyvinylcyclohexane (CEC) triblock copolymer on π-conjugated crystal structures of organic semiconductors. On the as-cast or nanophase-mediated CEC gate-dielectrics, 50 nm thick pentacene, PTCDI-C13, poly(3-hexyl thiophene) films were deposited to fabricate top-contact electrode OFETs. Crystalline structures of these semiconducting films were characterized using grazing-incidence X-ray diffraction, scattering, and nanoscale imaging techniques that allow the phase-separation transition, crystallinity, and molecular orientation information. |
