FLEXIBLE INKJET-PRINTED ELECTROLYTE-GATED ORGANIC TRANSISTORS FOR ANALYTICAL PURPOSES – EGOFLEX
The main goal of this project is the fabrication of sensors based on a new transistors architecture called Electrolyte-Gated Organic Field-Effect Transistors (EGOFETs) on flexible substrates exclusively by means of inkjet-printing. The main barriers addressed by our project are:
- the reduction of fabrication costs, the most important blocking point that prevents the commercialisation of organic electronic devices. This barrier will be addressed by using a fabrication technique such as inkjet-printing, able to create devices at ambient conditions and minimising, at the same time, the waste of functional materials ;
- the fabrication of flexible transistors. The large majority of organic devices are nowadays fabricated on rigid substrates, which clearly limits their portability and prevents their utilisation in all applications where conformal coating is crucial. This problem will be addressed by fabricating the devices on flexible, plastic substrates and by testing their reliability when they are subject to mechanical deformation;
- the fabrication of organic sensors able to detect analytes in liquid media. The large majority of organic materials are sensitive to water, which clearly limits their utilisation as liquid phase sensors and, in particular, as biosensors. The transistors architecture we chose for this project, namely the EGOFET structure, naturally contains a liquid element inside its configuration and therefore represents the ideal candidate for sensing in liquid media.
This project is structured in four tasks, the first one concerning the coordination. The second task will be dedicated to the fabrication of EGOFETs on flexible substrates. The third task will be devoted to the electrical characterisation and modelling (using the finite elements method) of EGOFETs; the final goal of modelling will be the prediction of transistors’ behaviour and, at the same time, the extraction of the most important electrical parameters necessary to evaluate their performances. The fourth task will be concerning the bio-functionalisation of transistors for selective detection of pollutants in aqueous media (i.e. bisphenol A). This project will be developed in collaboration with two other young researchers, Dr. S. Zrig (f, 36, organic chemist expert in the synthesis of organic semiconductors) and Dr. S. Reisberg (m, 37, biochemist expert in the functionalisation of surfaces for bio-detection).
The most important scientific benefits of this project can be summarised as follows:
1. the functional inks developed during task 2 could be used for the fabrication of any type of printed, organic device (other types of organic transistors, diodes, logic inverters, ring oscillators and RFID tags);
2. the fabrication protocol on plastic substrates can be easily transferred onto other types of flexible materials, including biodegradable materials such as paper and poly-lactic acid foils, which is a very important step in an epoch where the life of electronic devices is becoming shorter and shorter;
3. the functionalisation techniques by inkjet-printing developed during task 4 and the transduction principle can be extended to a large variety of analytes.
The membership of my research group to the AFELIM (Association Française de l’Electronique Imprimée) will allow an easy and rapid transfer of scientific and technological innovations to the industrial domain. The objectives of this project as well as the particular attention to the reduction of costs and materials waste make this project particularly consistent with the objectives of the challenge “Stimulating Industrial Renewal”.
Monsieur GIORGIO MATTANA (Interfaces, Traitements, Organisation et Dynamique des Systèmes)
The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.
ITODYS Interfaces, Traitements, Organisation et Dynamique des Systèmes
Help of the ANR 233,843 euros
Beginning and duration of the scientific project: - 36 Months