Thèse : Elaboration and characterization of field-effect transistors based on organic molecular wires for chemical sensing applications

Soutenance de thèse : Peter LIENERTH

Équipe : MaCEPV

Title: Elaboration and characterization of field-effect transistors based on organic molecular wires for chemical sensing applications

Abstract: Due to the weak van der Waals bonding between neighboring molecules charge transport in organic semiconductors is very sensitive to ambient gases. Polar analytes have been reported to decrease the mobility in organic field effect transistors (OFETs) allowing reliable and reproducible detection of known compounds. We found that the additional utilization of the hysteresis of the transfer characteristics creates individual response-patterns, improving the identification of different polar analytes. Measurements of the transient drain current were employed to gain insights into the underlying mechanisms of the hysteresis change.
To improve the understanding of the side-chain influences on the gas sensing performances polymers with different side chains were used as active material in OFETs for ethanol sensing. The differences in sensitivity were correlated to the results derived from various experimental techniques and allowed to draw consistent conclusions on the origin of the behavior.

Cette thèse a été dirigée par Thomas Heiser, professeur à l’Université de Strasbourg.

La présentation aura lieu le vendredi 31 janvier 2013 à 14h00 dans l'amphithéâtre M. Grünewald au Campus de Cronenbourg (Bâtiment 25).

Files:
• plan_du_campus_de_Cronenbourg.pdf  (36 ko)