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<dc:title xml:lang="en">Multiresponsive and supramolecular field-effect transistors</dc:title>
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<dc:subject xml:lang="fr">Transistors organiques à effet de champ</dc:subject>
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<dc:subject xml:lang="fr">Transistors ambipolaires</dc:subject>
<dc:subject xml:lang="fr">Molécules photochromiques</dc:subject>
<dc:subject xml:lang="en">Organic field-effect transistors</dc:subject>
<dc:subject xml:lang="en">Interfaces</dc:subject>
<dc:subject xml:lang="en">Ambipolar transistors</dc:subject>
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<tef:elementdEntree autoriteExterne="027828905" autoriteSource="Sudoc">Circuits à transfert de charge (électronique)</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Cette thèse a exploré comment, en mélangeant des matériaux avec des propriétés électriques différentes, il est possible de fabriquer des transistors avec des performances accrues. Des transistors organiques à effet de champ basés sur un oligothiophène (DH4T) ont été fabriqués et optimisés jusqu’à ce que les mobilités mesurées fussent supérieures à celles observées dans des films évaporés. Ces résultats ont été obtenus par le contrôle précis des interfaces et de la vitesse d’évaporation. Des polymères de type p ont été mélangés à des polymères de type n. Chaque solution obtenue a été utilisée pour la fabrication de transistors ambipolaires. Les transistors ont été caractérisés et il a été possible de fabriquer des transistors avec des mobilités équilibrées pour chaque paire de polymères. Des transistors à effet de champ basés sur un mélange de P3HT et d’une molécule photochromique (DAE-Me) ont été fabriqués. Le courant a été mesuré pendant et entre les irradiations et il a été démontré qu’une mémoire non-volatile à multiple niveaux peut être fabriquée</dcterms:abstract>
<dcterms:abstract xml:lang="en">This thesis explored how, by blending of materials with different electrical characteristics, it is possible to fabricate transistors with new or improved performances. First, organic field-effect transistors based on a single oligothiophene, DH4T, were fabricated and optimized until the measured mobility was superior to that observed in vacuum deposited films. This was achieved through careful tuning of the interfaces using self-assembled monolayers and by strong control of the solvent- evaporation rate. P-type polymers were blended with an n-type polymer. Each resulting solution was used for the fabrication of ambipolar field-effect transistors. These devices were characterized and it was found that for each pair of p- and n-type polymers, a transistor with balanced mobilities and high Ion/Ioff could be fabricated. Finally field-effect transistors based on a blend of P3HT and a photoswitchable diarylethene (DAE-Me) were fabricated. The current was measured during and between irradiations and it was demonstrated that a non-volatile multilevel memory could be fabricated.</dcterms:abstract>
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