The framework of this thesis is the development of large area printed applications on flexible substrate, based on the printed organic transistors technology (OTFTs). This work will take place in the Portable Energies and Printed Components Service (SENCI) of CEA-LITEN based in Grenoble. Thanks to chemical synthesis, performances of organic semiconductors have been strongly increased and they are now comparable to the technology of amorphous silicon employed in active matrix backplanes for flat panel display. The OTFTs have consequently a strong potential to build new sustainable technologies. However, the stability and reliability of these transistors have to be investigated to consider any industrial implementation. The main objective of this thesis is the experimental and theoretical study of the reliability of organic transistors fabricated at CEA-LITEN. The objective is to understand the transport mechanisms and then to identify the different mechanisms involved in the degradation of these transistors to give a first evaluation of the technology in terms of reliability. This work will be focused on three major points: – Electrical characterization of OTFTs. The conduction mechanisms will be characterized as well as the evolution of the OTFTs electrical performances during ageing under different conditions (bias stress, light, humidity, temperature …). – Physicochemical characterization of materials and interfaces to study the evolution of the different layers during the reliability tests. – Physical modelling and understanding of the physical phenomena involved in the operation and reliability of OTFTs.

This position is open until it is filled.

Département: Département des Technologies des NanoMatériaux (LITEN)
Laboratory: Laboratoire Fiabilité et Vieillissement des Composants
Start Date: 01-05-2015
ECA Code: SL-DRT-15-0906
Contact: stephanie.jacob<στο>cea.fr