Optimized circuit design for flexible 8-bit RFID transponders with active layer of ink-jet printed small molecule semiconductors

B.K.C. Kjellander, W.T.T. Smaal, K. Myny, J. Genoe, W. Dehaene, P. Heremans, G.H. Gelinck

Research output: Contribution to journalArticleAcademicpeer-review

61 Citations (Scopus)
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Abstract

We ink-jet print a blend of 6,13-bis(triisopropyl-silylethynyl)pentacene and polystyrene as the active layer for flexible circuits. The discrete ink-jet printed transistors exhibit a saturation mobility of 0.5 cm2 V -1 s-1. The relative spread in transistor characteristics can be very large. This spread is due to the morphology of the TIPS-PEN crystals, and is difficult to control using inkjet printing. Here we apply a novel circuitry design to minimize the probability of differences between the transistors. We include up to four transistors under the same ink-jet printed deposit. With the new design, we demonstrate unipolar circuitry building blocks such as inverters, NANDs and 19-stage ring-oscillators. Additionally, we integrate almost 300 TFTs, on a surface area of 34 mm2 of plastic foil, for 8-bit RFID transponder circuits.

Original languageEnglish
Pages (from-to)768-774
Number of pages7
JournalOrganic Electronics
Volume14
Issue number3
DOIs
Publication statusPublished - Mar 2013
Externally publishedYes

Keywords

  • Flexible circuits
  • Ink-jet printing
  • Morphology
  • Organic RFID
  • Organic transistors
  • Unipolar circuits

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