Thèse soutenue

Elaboration, caractérisation et modélisation de transistors à base de pentacène : application aux circuits électroniques organiques
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Auteur / Autrice : Ahmad Skaiky
Direction : Bruno LucasThierry Trigaud
Type : Thèse de doctorat
Discipline(s) : Sciences et Ingénierie pout l'information (S2I)
Date : Soutenance en 2013
Etablissement(s) : Limoges
Partenaire(s) de recherche : autre partenaire : Université de Limoges. Faculté des sciences et techniques

Mots clés

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Résumé

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The objective of this thesis is the modeling of organic transistors based on pentacene and the realization of inverter electric circuits. In this context, we have studied charge transport mechanism in pentacene with two methods (I(V) and impedance spectroscopy) and we have determined the physical properties of pentacene (mobility, trap density, trap energy level…). After that, we have realized an organic field-effect transistor in “top contact” structure while studying the impact of the channel length and thickness of active layer on the performance of this device and while comparing the results with those obtained from the simulation carried out with ATLAS software. We have found a good concordance concerning output and transfer curves. Finally, we have developed organic inverters first in the “diode-load inverter” architecture. The optimization of parameters like the channel length, the thickness of the active layer and the deposition rate of pentacene has led to a significant voltage gain as we work on change in crystalline morphology. With dual threshold voltage OTFT organic inverter in depletion mode have been realize with gain around 7. These results open new perspectives and could be improved by manufacturing inverters in O-CMOS technology.