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Organización de la columna vertebral rígida inducida por la cadena lateral de semiconductores poliméricos a través de
Boseok Kang1, Ran Kim2, Seon Baek Lee1
1Department of Chemical Engineering, Pohang University of Science and Technology , Pohang 790-784, Korea.
Journal of the American Chemical Society
|December 15, 2015
Resumen
Los investigadores desarrollaron nuevos polímeros conjugados de tipo n utilizando cadenas laterales semifluoradas. Estos polímeros exhiben una alta movilidad de electrones y excelentes relaciones de encendido-apagado en los transistores de efecto de campo, abordando un desafío clave en la electrónica orgánica.
Área de la Ciencia:
- Ciencias de los materiales
- Productos electrónicos orgánicos
- Química de los polímeros
Sus antecedentes:
- Los polímeros conjugados de tipo p de alta movilidad son comunes, pero los polímeros conjugados de tipo n de alta movilidad siguen siendo escasos.
- El desarrollo de semiconductores orgánicos eficientes de tipo n es crucial para el avance de los dispositivos electrónicos orgánicos.
Objetivo del estudio:
- Diseñar y sintetizar nuevos polímeros basados en diimida de naftaleno con propiedades semiconductoras mejoradas de tipo n.
- Investigar el impacto de las cadenas laterales de alquilo semifluoradas en el ordenamiento de polímeros y el transporte de carga.
Principales métodos:
- Síntesis de polímeros a base de diimida de naftaleno (PNDIF-T2 y PNDIF-TVT) que incorporan cadenas laterales de alquilo semifluoradas.
- Fabricación y caracterización de transistores de efecto de campo para evaluar las propiedades de transporte de carga.
- Análisis de la superestructura del polímero y ordenamiento mediante técnicas estructurales.
Principales resultados:
- Las cadenas laterales semifluoradas diseñadas indujeron una fuerte autoorganización, formando una superestructura de "cristales de columna vertebral" y "cristales de cadena lateral".
- Esto mejoró el orden a lo largo de la dirección de la columna vertebral del polímero.
- Se logra un transporte unipolar de n canales con una alta movilidad de electrones de hasta 6,50 cm V s y una relación de corriente encendida-apagada de 105.
Conclusiones:
- Las cadenas laterales de alquilo semifluoradas son efectivas para promover la autoorganización y mejorar el ordenamiento de las columnas vertebrales de polímeros conjugados.
- Los polímeros desarrollados demuestran un potencial significativo para transistores orgánicos de efecto de campo de tipo n de alto rendimiento.
- Este trabajo proporciona una estrategia prometedora para el diseño de polímeros conjugados de tipo n de alta movilidad.
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