Direct writing of silver nanowire electrodes via dragging mode electrohydrodynamic jet printing for organic thin film transistors

• Published in: Organic electronics Vol. 62; pp. 357 - 365
• Main Authors: Li, Xinlin, Lee, Gyu Sung, Park, So Hyun, Kong, Hoyoul, An, Tae Kyu, Kim, Se Hyun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2018
• Subjects: AgNWs; Electrohydrodynamic jet printing; Organic thin-film transistor; Pentacene; Pentacene; Electrohydrodynamic jet printing; AgNWs; Organic thin-film transistor
• ISSN: 1566-1199; 1878-5530
• DOI: 10.1016/j.orgel.2018.07.027

AgNWs-based electrodes were directly patterned using an electrohydrodynamic (EHD) jet printing technique. We investigated EHD jet printing for AgNWs ink in detail, and established the optimum printing conditions in dragging mode for controlling the dimensions and conductivity of the AgNWs network, although the cone-jet printing mode has been the most conventionally used mode for EHD jet printing. The printed AgNWs were used as source/drain (S/D) electrodes of an organic thin film transistor (OTFT) with bottom-contact geometry, and yielded an average field-effect mobility (μFET), threshold voltage (Vth) and on/off current ratio (Ion/Ioff) of 0.48 cm2/V, −11.2 V, and ∼106, respectively. In addition, we investigate the interface morphologies between pentacene and AgNWs S/D electrode to figure out charge carrier injection property of AgNWs S/D electrode, by comparing vacuum-deposited Au ones. [Display omitted] •We investigated electrohydrodynamic (EHD) jet printing for silver nanowires (AgNW) ink.•The optimum printing mode can control the dimensions and conductivity of AgNW network.•EHD-jet-printed AgNWs were used as the electrodes of pentacene OTFTs.•AgNW-based OTFTs showed a μFET of 0.48 cm2/V, 100 times that of gold-based OTFTs.