Large-area patterning of a solution-processable organic semiconductor to reduce parasitic leakage and off currents in thin-film transistors

Kimberly C. Dickey, Sankar Subramanian, John E. Anthony, Li Hsin Han, Shaochen Chen, Yueh Lin Loo

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

We describe two techniques for patterning spin-cast thin films of a solution-processable organic semiconductor, triethylsilylethylnyl anthradithiophene (TES ADT), to eliminate parasitic leakage currents and to lower off currents in thin-film transistors. One technique utilizes UV light in the presence of solvent vapors to simultaneously define the active channel and to crystallize TES ADT. The second technique selectively removes TES ADT from the nonchannel regions of the thin-film transistors through direct contact with a poly(dimethylsiloxane) stamp. Both patterning techniques yield thin-film transistors with high charge-carrier mobility (0.1 cm2 V s), low off currents (10-10 - 10-11 A), and minimal parasitic leakage.

Original languageEnglish (US)
Article number244103
JournalApplied Physics Letters
Volume90
Issue number24
DOIs
StatePublished - Jun 22 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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