We report on the fabrication of pentacene-based organic inverter with two p-channel thin-film transistors (TFTs) on polymer/AlOx bilayer dielectric, which has been patterned by using high-energy ultraviolet (UV, 254 nm) illumination. After pentacene-channel growth on the dielectric, our inverter showed a high-voltage gain of ∼8 under -6 V supply voltage (VDD) but voltage transfer characteristics (VTC) curve is too marginal to guarantee a desirable inverter operation between 0 and -6 V. When low-energy UV (352 nm) was applied onto one of the two p-TFTs, which plays as a load in the inverter circuit, the VTC curve was adjusted to be more adequate for inverting operation due to the UV-induced modification on the threshold voltage and channel resistance of the load-TFT. Our UV-treated inverter also demonstrated much faster inverting dynamics than that of pristine inverter due to the lowered channel resistance of load-TFT.
Bibliographical noteFunding Information:
This research was performed with the financial support from KOSEF (Program No. 2002-03177) and L.G. Philips LCD (project year 2005). They also acknowledge the support from Seoul Science Fellowship and Brain Korea 21 Project.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry