Abstract
Flexible, high-performance, and low-cost organic-thin-film-transistors (OTFTs) can be fabricated utilizing polyethylene terephthalate (PET) as a substrate material and low-temperature curable polyimide (PI) as a gate insulator. In this paper, top-contact OTFTs with a PET/Au/polyimide/pentacene/Au structure were fabricated and evaluated. Here, a low temperature (200 °C)-curable PI was employed. The influences of pentacene purity on the OTFT performance were also investigated. As a result, flexible OTFTs were successfully fabricated, and the mobility of the OTFT with the 99.9%-purity pentacene was 0.011 cm2/Vs, while the mobility of the OTFT with the 99.995%-purity pentacene increased up to 0.1 cm2/Vs.
