Abstract
Inkjet direct writing of functional materials provides a promising pathway towards realization of ultra-low-cost, largearea printed electronics, albeit at the expense of lowered resolution (~20-50 μm). We demonstrate that selective laser sintering and ablation of inkjet-printed metal nanoparticles enables low-temperature metal deposition as well as highresolution patterning. Combined with an air-stable carboxylate-functionalized polythiophene, all-inkjet-printed and laser-processed organic field effect transistors with micron to submicron critical feature resolution were fabricated in a fully maskless sequence, eliminating the need for any lithographic processes. All processing and characterization steps were carried out at plastic-compatible low temperatures and in air under ambient pressure. The fundamental mechanisms of the nanoparticle sintering process have been investigated by both Molecular Dynamics (MD) simulations as well as in-situ probing.
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