La sixième édition des journées annuelles du GDR OERA sera organisée à Strasbourg les 07 et 08 novembre 2024.

We show that the electron mobility in films based on different derivatives of the ITIC family (ITIC, ITIC-Th and ITIC-4F) is strongly influenced by polymorphism; polymorphism specific to each molecule and depending on the annealing temperature applied to thin films. This leads to a strong increase in electron mobility compared to un-annealed films, which correlates with changes in molecular aggregation, crystallinity and domain orientation as well as intermolecular electronic coupling. Compared to the alkyl chain substitution used in ITIC-Th, fluorination in ITIC-4F leads to the highest electron mobility with 3.7×10-2 cm2/V.s at 200°C, due to the formation of highly ordered J-aggregates with enhanced intermolecular interaction.

For wearable applications such as electronic skin and biosensors, stretchable conductors are required. Owing to its high conductivity, good flexibility, low cost, and ease of processing, PEDOT appears as a promising candidate. However, destructive cracks come out above 10% strain in the case of PEDOT:PSS, the most common form of PEDOT. This article presents a different approach to obtain highly conductive and stretchable PEDOT materials based on doping with small counteranions.

A novel nanotechnological process is used to study spin-polarized transport across a molecular spin chain within a solid-state device. According to experiment and theory, electrically exciting the spin chain generates a specific magnetoresistance signal. This quantum encoding of information lays the groundwork for information transmission across the spin chain and should stimulate quantum prospects for antiferromagnetic spintronics and oxides electronics.

Cell Reports Physical Science Volume 2, Issue 3, 24 March 2021, 100381