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Extensive Leakage Current Reduction in Polymer Dielectric Thin Film by Metal Nanoparticles Incorporation for Organic Thin Film Transistor

A polymer incarcerated gold nanoparticles has been prepared and successfully applied as an insulator to reduce the leakage current. The effect of size of gold nanoparticles on leakage current was also investigated. This stable organic insulator performed a good dielectric strength. Leakage current density was depressed to 10-7 A/cm2 in high electric field of 2 MV/cm by incorporated with 10 nm gold nanoparticles. Moreover, both charging energy theory and space-charge-limited current model were proposed to explain the extensive leakage current reduction phenomenon.