| 초록 |
An emerging class of polymer electrolytes known as ion gels can serve as printable, high capacitance gate insulators in organic thin film transistors (OTFTs). The gels are prepared by self-assembly of a block copolymer network in an ionic liquid matrix; both components dissolve in a common solvent resulting in an ink that may be printed directly onto flexible substrates. The ion gel specific capacitance can exceed 10 F/cm2, a value much larger than that of conventional ceramic or polymeric gate dielectrics. All-printed polymer OTFTs and inverters incorporating ion gel gate insulators operate at low voltages (＜ 2V) and kHz switching frequencies, with both exceptional transconductances (＞ 500S/mm) and good ambient stability. Furthermore, the high polarizability of ion gels relaxes the usual requirement for precision alignment of the gate with respect to the source-drain channel, enabling simpler device architectures that are more compatible with high speed printing. |
