All-inkjet printed organic transistors: Dielectric surface passivation techniques for improved operational stability and lifetime

• DOI: 10.1016/j.microrel.2015.05.006
• Publication Date: 2015-05-26T16:48:26Z
• Authors: H.L. Gomes; M.C.R. Medeiros; F. Villani; J. Canudo; F. Loffredo; R. Miscioscia; C. Martinez-Domingo; E. Ramon; E. Sowade; K.Y. Mitra; R.R. Baumann; I. McCulloch; J. Carrabina
• Keywords: Passivation

Abstract We report about the use of a printed pentafluorothiophenol layer on top of the dielectric surface as a passivation coating to improve the operational stability of all-ink-jet printed transistors. Transistors with bottom-gate structure were fabricated using cross-linked poly-4-vinylphenol (c-PVP) as dielectric layer and an ink formulation of an amorphous triarylamine polymer as semiconductor. The resulting TFTs had low turn-on voltage (Vth