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Un benzo[2,1-b:3,4-b']ditiofeno con extremo cubierto de estirilo en forma de "cometa" con altas prestaciones
Yahia Didane1, Georg H Mehl, Atsufumi Kumagai
1Ingenierie Moleculaire et Materiaux Fonctionnels, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), CNRS UPR 3118, Campus Luminy, Aix Marseille Universite, Marseille, France.
Journal of the American Chemical Society
|December 26, 2008
Resumen
El puente entre el distiril-bitiofeno crea un semiconductor curvo que inesperadamente mejora el rendimiento del transistor orgánico de película delgada (OTFT) en el aire. Esta nueva molécula en forma de cometa supera significativamente el rendimiento de su contraparte plana.
Área de la Ciencia:
- La electrónica orgánica es la electrónica orgánica.
- Ciencia de los materiales ciencia de los materiales.
- Física de los semiconductores física de los semiconductores.
Sus antecedentes:
- Los semiconductores orgánicos conjugados son cruciales para los dispositivos electrónicos.
- El diseño molecular tiene un impacto significativo en el rendimiento de los semiconductores.
- Las arquitecturas moleculares curvas en semiconductores orgánicos son menos exploradas.
Objetivo del estudio:
- Para investigar el impacto de puente de distiril-bitiofeno en sus propiedades electrónicas.
- Explorar el rendimiento del semiconductor curvo resultante en transistores orgánicos de película delgada (OTFT).
- Para comparar el rendimiento con un análogo plano.
Principales métodos:
- Síntesis de un derivado puente de distiril-bitiofeno.
- Fabricación y caracterización de transistores orgánicos de película delgada (OTFT) utilizando el nuevo semiconductor.
- Evaluación del rendimiento en condiciones ambientales, incluida la movilidad del portador de carga y las relaciones de conmutación.
Principales resultados:
- El puente entre el distiril-bitiofeno dio como resultado un sistema conjugado curvo y en forma de cometa.
- El semiconductor curvo exhibió un excelente rendimiento OTFT en el aire.
- Movilidad alcanzada (μ) de 0,1 cm2/V.s y una relación encendido/apagado (>106).
- El rendimiento fue aproximadamente cinco veces mayor que el análogo plano sin puentes.
Conclusiones:
- La curvatura molecular en sistemas conjugados puede ser beneficiosa para el rendimiento OTFT.
- El derivado distiril-bitiofeno en forma de cometa representa un nuevo semiconductor prometedor para la electrónica estable en el aire.
- Este trabajo desafía la percepción de tales curvaturas como indeseables, destacando su potencial.
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