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All-printed Flexible Organic Transistors Enabled by Surface Tension-guided Blade Coating

Overview
Journal Adv Mater
Date 2014 Jun 20
PMID 24941920
Citations 21
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Abstract

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.

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