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Adaptación de las relaciones estructura-propiedad en los copolímeros donante-aceptor de dietienosilole-benzotiadiazol

Pierre M Beaujuge¹, Wojciech Pisula, Hoi Nok Tsao

¹The George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA.

Journal of the American Chemical Society

|May 19, 2009

Resumen

Se sintetizaron nuevos copolímeros orgánicos para aplicaciones potenciales de células solares. El copolímero de mejor rendimiento, P4, demostró una excelente movilidad de agujero debido a su apilamiento molecular ordenado.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Electrónica orgánica y electrónica orgánica.
Química de Polímeros La Química de Polímeros es la química de los polímeros.

Sus antecedentes:

Los semiconductores orgánicos son cruciales para la próxima generación de dispositivos electrónicos.
El ajuste de la estructura del polímero influye en el autoensamblaje y las propiedades de transporte de carga.

Objetivo del estudio:

Sintetizar y caracterizar nuevos copolímeros donante-aceptante para la electrónica orgánica.
Investigar las relaciones estructura-propiedad de estos copolímeros.

Principales métodos:

Síntesis de cuatro copolímeros DTS-BTD (P1-P4) con diferentes concentraciones de sustitutos.
Caracterización utilizando dispersión de rayos X de ángulo ancho 2D (2D-WAXS).
Fabricación y caracterización de dispositivos en transistores de efecto de campo (FET) de contacto con el fondo.

Principales resultados:

Todos los copolímeros se autoensamblan en superestructuras lamelares.
Los copolímeros P2 y P4 exhibieron un apilamiento significativo de pi.
P4 mostró una alta movilidad del agujero de 0,02 cm2/Vs, correlacionada con la apilamiento cercano de pi (0,36 nm) y las distancias lamelares (1,84 nm).
P4 demostró una absorción homogénea en todo el espectro visible.

Conclusiones:

El diseño molecular tiene un impacto significativo en las propiedades de autoensamblaje y electrónicas de los copolímeros DTS-BTD.
P4 se muestra prometedor para las aplicaciones de células solares debido a sus propiedades estructurales y ópticas favorables.
El apilamiento pi cercano y las estructuras lamelares ordenadas son claves para la alta movilidad del portador de carga en estos materiales.

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