Controlling the electrical properties of pentacene-based organic inverter by ultraviolet

Jeong M. Choi, Wonjun Choi, Seungjun Lee, Seongil Im

Research output: Contribution to journalLetterpeer-review

6 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1072-1076
Number of pages5
JournalSynthetic Metals
Issue number21-24
Publication statusPublished - 2008 Dec

Bibliographical note

Funding 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


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