Aerosol Jet Printing for development of an organic electrochemical transistor

Aerosol Jet Printing attracts researchers’ and industries’ attention. What are its main features?

Over the years relevant efforts have been devoted to design and implement new printing techniques fostering rapid prototyping of various #geometries, overcoming limitations of traditional and cost consuming photolithographic methods.
One of the direct writing non contact printing technique that has attracted researchers’ and industries’ attention is the Aerosol Jet Printing (AJP).

Common printing techniques (i.e. Ink Jet printing, IJP) present several disadvantages and limitations in terms of printable materials, features and consumptions. AJP, on the contrary, is a low cost, low consumption solution able to deposit a wide range of materials (i.e. metals, organic semiconductors, dielectric, biological materials etc…) with a lines definition around 10 micrometers.

At Henesis, we have investigated and optimized the Aerosol Jet Printing as one of the most used organic conductors PEDOT:PSS and we have adopted these technique for the development of a full printed organic electrochemical transistor (OECT) usable in the biosensing field.

In the 2020 Henesis in collaboration with IMEM-CNR published a scientific #article where a complete and reproducible recipe for PEDOT:PSS deposition has been reported.
In the article, this recipe is used to develop a full printed OECTs array in which all the device essential parts (contact layer, active layer and passivation layer) are deposited through AJP technique.

Nowadays, AJP technique is the core of many Henesis R&D projects with application in several field from biosensing to energy harvesting.