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Alta movilidad del portador de carga en un derivado amorfo de hexaazatrinaftileno
Bilal R Kaafarani1, Takeshi Kondo, Junsheng Yu
1Center for Organic Photonics and Electronics, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
Journal of the American Chemical Society
|November 25, 2005
Resumen
Una mezcla isomérica de un derivado tris ((pentafluorobenzil ester) del hexaazatrinanftileno forma películas amorfas estables con buena movilidad de la carga portadora. El isómero 2,8,15-puro es el más puro.
Área de la Ciencia:
- La electrónica orgánica es la electrónica orgánica.
- Ciencia de los materiales ciencia de los materiales.
- Se trata de una química supramolecular.
Sus antecedentes:
- Los derivados de hexaazatrinanaftileno se exploran para aplicaciones electrónicas.
- El control de la morfología es clave para optimizar la movilidad del portador de carga en semiconductores orgánicos.
Objetivo del estudio:
- Investigar el impacto de la pureza isomérica en la morfología de la película y la movilidad del portador de carga de un derivado tris ((pentafluorobenzil ester) de hexaazatrinaphthylene.
- Para comparar las propiedades de una mezcla isomérica con un isómero puro.
Principales métodos:
- Síntesis del derivado de hexaazatrinaftileno.
- Fabricación de películas delgadas tanto de la mezcla isomérica como del isómero 2,8,15 puro.
- Caracterización de la morfología de la película utilizando técnicas de microscopía.
- Medición de la movilidad de la carga portadora utilizando mediciones de transporte eléctrico.
Principales resultados:
- La mezcla isomérica formó películas amorfas estables con una movilidad efectiva del portador de carga de 0,02 cm2/Vs.
- El isómero puro de 2,8,15 exhibió diversas morfologías y una amplia gama de movilidades portadoras (0,0010,07 cm2/Vs).
- Las propiedades de la película del isómero puro fueron críticamente dependientes de las condiciones de procesamiento.
Conclusiones:
- La composición isomérica influye significativamente en la estabilidad morfológica y las propiedades de transporte de carga de los derivados de hexaazatrinaftileno.
- Las películas amorfas de mezclas isoméricas ofrecen una ruta a propiedades electrónicas reproducibles.
- Las condiciones de procesamiento son cruciales para controlar el rendimiento de los isómeros puros en los dispositivos electrónicos orgánicos.
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