All-printed flexible organic transistors enabled by surface tension-guided blade coating

Adv Mater. 2014 Aug 27;26(32):5722-7. doi: 10.1002/adma.201401520. Epub 2014 Jun 18.


A combination of surface energy-guided blade coating and inkjet printing is used to fabricate an all-printed high performance, high yield, and low variability organic thin film transistor (OTFT) array on a plastic substrate. Functional inks and printing processes were optimized to yield self-assembled homogenous thin films in every layer of the OTFT stack. Specifically, we investigated the effect of capillary number, semiconductor ink composition (small molecule-polymer ratio), and additive high boiling point solvent concentrations on film fidelity, pattern design, device performance and yields.

Keywords: Printed organic electronics; flexible electronics; organic semiconductor blends; organic thin film transistors; solution processed thin films.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.