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Semiconductores orgánicos de alto rendimiento: acenos lineales asimétricos que contienen azufre
Ming L Tang1, Toshihiro Okamoto, Zhenan Bao
1Department of Chemistry, Stanford University, California 94305, USA.
Journal of the American Chemical Society
|December 15, 2006
Resumen
Se sintetizaron dos nuevos acenos lineales con unidades de tiofeno fusionadas, uniendo las longitudes de conjugación del antraceno y el pentaceno. Estos semiconductores orgánicos exhiben prometedoras movilidades de portadores de carga para aplicaciones electrónicas.
Área de la Ciencia:
- Química orgánica es la química orgánica.
- Ciencia de los materiales Ciencia de los materiales.
- Física del estado sólido Física del estado sólido
Sus antecedentes:
- Los acenos lineales son semiconductores orgánicos cruciales.
- La longitud de la conjugación de afinación tiene un impacto en las propiedades electrónicas.
- Las unidades de tiofeno fundido ofrecen características electrónicas únicas.
Objetivo del estudio:
- Sintetiza nuevos acenos lineales con unidades de tiofeno fusionadas.
- Investigar su morfología de película delgada y el crecimiento.
- Evaluar sus propiedades de transporte de carga para posibles aplicaciones.
Principales métodos:
- Síntesis química de nuevos derivados del aceno.
- Caracterización de película delgada mediante espectroscopia ultravioleta y difracción de rayos X.
- Análisis morfológico mediante microscopía de fuerza atómica (AFM).
- Evaluación del rendimiento eléctrico utilizando mediciones de transistores de efecto de campo (FET).
Principales resultados:
- Síntesis exitosa de dos nuevos acenos lineales con conjugación entre antraceno y pentaceno.
- La AFM reveló un crecimiento de la submonocapa similar al pentaceno y una morfología de película delgada dendrítica.
- Se lograron movilidades de alta carga transportadora: hasta 0,47 cm2 V-1 s-1 para el tetraceno [2,3-b]tiofeno y 0,15 cm2 V-1 s-1 para el antra [2,3-b]tiofeno.
Conclusiones:
- Los acenos lineales sintetizados son materiales orgánicos semiconductores prometedores.
- La morfología influye significativamente en el transporte de carga en estos materiales.
- Estos hallazgos contribuyen al desarrollo de dispositivos electrónicos orgánicos avanzados.
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