High-Resolution Inkjet Printing of All-Polymer Transistor Circuits

Abstract

Direct printing of functional electronic materials may provide a new route to low-cost fabrication of integrated circuits. However, to be useful it must allow continuous manufacturing of all circuit components by successive solution deposition and printing steps in the same environment. We demonstrate direct inkjet printing of complete transistor circuits, including via-hole interconnections based on solution-processed polymer conductors, insulators, and self-organizing semiconductors. We show that the use of substrate surface energy patterning to direct the flow of water-based conducting polymer inkjet droplets enables high-resolution definition of practical channel lengths of 5 micrometers. High mobilities of 0.02 square centimeters per volt second and on-off current switching ratios of 10(5) were achieved.

Reversible Optical Control of Conjugated Polymer Solubility with Sub-micrometer Resolution

“…2,3,11,14,28 Unfortunately, none of these methods are universally effective and many require numerous processing steps, reducing the cost advantage of solution-processing. Cross-linking reactions permanently alter the chemical structure and generally require chemical tailoring, which usually results in degraded material properties.…”

Graphene Field-Effect Transistors with Gigahertz-Frequency Power Gain on Flexible Substrates

“…1 The electronic materials used in these cases have largely been polymers and small-molecule organic films because of the desire to exploit large-area, low-cost fabrication approaches, such as roll-to-roll dry 2 or inkjet printing. 3 The resulting electronic device performance, however, has been relatively poor, with inherent lowfield mobilities typically less than 1 cm 2 V -1 s -1 and mobilities in integrated devices typically below 0.05 cm 2 V -1 s -1 . [1][2][3] Both reliability and low-voltage operation have been challenging.…”

BODIPY derivatives as n-type organic semiconductors: Isomer effect on carrier mobility

“…In the past decades, molecular organic semiconductors is the object of much interest because of their applications in new generations of (opto)electronic devices [1][2][3][4][5][6][7][8]. The development of single-crystal organic field effect transistors (SCOFETs) makes it possible to explore intrinsic properties of these materials [9][10][11].…”