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Development of hybrid organic/inorganic thin-film transistors with top and bottom-contact configuration using semiconducting polymers (P3HT, PQT12, PBTTT) deposited by means of the solid-phase Laser Induced Forward Transfer (LIFT) technique. Semiconducting pixels and lines were Laser printed onto pre-deposited source and drain electrodes formed on silicon dioxide/p+-type Si substrate. The transfer characteristics exhibited well-defined sub-threshold, linear and saturation regimes designating LIFT as a promising technique for hybrid organic/inorganic transistor technology.
The laser printing of both silver source (S) and drain (D) electrodes and semiconducting organic layer (P3HT) resulting in operating OTFT devices was also successful.
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LIFT technique has also the ability to print multilayer films in a single step approach for the realization of organic thin film transistors (OTFTs) in top gate configuration. The main advantage of printing multilayer film in a single step is the guarantee of keeping all the initial properties of the interfaces between the different layers. The risk of damaging the layers is also strongly reduced.