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Síntesis, caracterización y aplicación de semiconductores de indolo [3,2-b]carbazol
Pierre-Luc T Boudreault1, Salem Wakim, Nicolas Blouin
1Département de Chimie, Université Laval, Quebec City, Quebec, Canada, G1K 7P4.
Journal of the American Chemical Society
|July 3, 2007
Resumen
Nuevos materiales orgánicos de indolo[3,2-b]carbazoles muestran un prometedor rendimiento de transistor de efecto de campo (FET) tipo p. Los compuestos sustituidos por fenilo exhiben una alta movilidad y estabilidad en el aire, lo que sugiere un potencial para aplicaciones electrónicas.
Área de la Ciencia:
- La electrónica orgánica es la electrónica orgánica.
- Ciencia de los materiales ciencia de los materiales.
- Física del estado sólido física del estado sólido.
Sus antecedentes:
- Los carbazoles indolo[3,2-b] son una clase de compuestos orgánicos con propiedades semiconductoras potenciales.
- Comprender la relación entre la estructura molecular y la organización en estado sólido es crucial para optimizar los dispositivos electrónicos orgánicos.
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos derivados del indolo [3,2-b]carbazole.
- Para investigar el impacto de los sustituyentes de la cadena lateral en la estructura cristalina y el embalaje en estado sólido.
- Para evaluar el rendimiento del transistor de efecto de campo (FET) de estos nuevos materiales orgánicos.
Principales métodos:
- Síntesis de derivados del indolo[3,2-b]carbazole con diferentes cadenas laterales (alquilo, fenilo, tienila).
- Caracterización extensa que incluye el análisis de la estructura cristalina (difracción de rayos X).
- Fabricación y prueba de transistores orgánicos de efecto de campo (OFET) para determinar las propiedades eléctricas.
Principales resultados:
- El análisis de la estructura cristalina reveló que las cadenas laterales influyen significativamente en la organización del estado sólido.
- Los materiales orgánicos exhibieron un comportamiento de FET de tipo p con altas movilidades de agujero (hasta 0,2 cm2 V(-1) s(-1)).
- Se logró una relación de encendido/apagado de corriente superior a 10 (6).
- Los indolo[3,2-b]carbazoles sustituidos por fenilo mostraron el mejor rendimiento debido a la eficiente superposición molecular.
- Las propiedades de FET se mantuvieron estables durante varios meses cuando se expusieron al aire.
Conclusiones:
- La ingeniería de la cadena lateral es crítica para controlar el embalaje en estado sólido y el rendimiento FET de los carbazoles indolo [3,2-b].
- Los indolo[3,2-b]carbazoles sustituidos por fenilo son candidatos prometedores para semiconductores orgánicos de tipo p estables y de alto rendimiento.
- La estabilidad del aire demostrada es una ventaja significativa para aplicaciones prácticas en electrónica orgánica.
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