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Hexatienocoronenos: síntesis y autoorganización.
Long Chen1, Sreenivasa R Puniredd, Yuan-Zhi Tan
1Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
Journal of the American Chemical Society
|October 16, 2012
Resumen
Los hexatienocoronenos (HTC), una nueva clase de semiconductores orgánicos, exhiben propiedades sintonizables basadas en la longitud de la cadena de alquilo. Si bien son donantes más fuertes que los compuestos relacionados, el rendimiento de sus transistores de película delgada es moderado debido al autoensamblaje limitado.
Área de la Ciencia:
- La electrónica orgánica es la electrónica orgánica.
- Ciencia de los materiales ciencia de los materiales.
- Química de los semiconductores.
Sus antecedentes:
- Los coronenos y sus análogos anelados con tiofeno son los bloques de construcción clave de los semiconductores orgánicos.
- El ajuste de la estructura molecular es crucial para controlar las propiedades electrónicas y la morfología de la película.
Objetivo del estudio:
- Para sintetizar y caracterizar los nuevos hexatienocoronenos (HTC).
- Para investigar la influencia de la longitud de la cadena de alquilo en la formación de la fase HTC y las propiedades electrónicas.
- Para evaluar el rendimiento de HTC en transistores orgánicos de película delgada (OTFT).
Principales métodos:
- Síntesis de hexatienocoronenos tetrasubstituidos con cadenas hexilo y dodecilo.
- Difracción de rayos X y calorimetría de barrido diferencial para el análisis del comportamiento de fase.
- Fabricación y caracterización de transistores orgánicos de película delgada (OTFT) mediante deposición al vacío.
Principales resultados:
- Los hexatienocoronenos (HTC) fueron sintetizados y funcionalizados con éxito.
- La formación de la fase depende en gran medida de la longitud de las cadenas de alquilo unidas.
- Los HTC demuestran una mayor fuerza del donante en comparación con las coronenas aneladas con tiofeno existentes.
- Las películas HTC depositadas al vacío producen movilidades modestas de efecto de campo (0.002 cm(2) V(-1) s(-1)).
Conclusiones:
- Los hexatienocoronenos representan una nueva clase prometedora de semiconductores orgánicos con propiedades sintonizables.
- Se necesita una mayor optimización de las técnicas de deposición de película para mejorar el transporte de carga en los dispositivos basados en HTC.
- La fuerte dependencia de la longitud de la cadena ofrece un camino para el diseño racional de nuevos materiales electrónicos orgánicos.
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