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Tiadiazoloquinoxalina-acetileno que contiene polímeros como semiconductores en los transistores de efecto de campo

Timea Dallos¹, Dirk Beckmann, Gunther Brunklaus

¹Max Planck Institute for Polymer Research, Mainz, Germany.

Journal of the American Chemical Society

|August 13, 2011

Resumen

Los investigadores desarrollaron nuevos copolímeros conjugados, PPTQT y PTTQT, con tiadiazoloquinoxalinas y unidades de tiofeno. PPTQT demuestra propiedades semiconductoras ambipolares, marcando un gran avance en la electrónica de polímeros.

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 polímeros conjugados son cruciales para los dispositivos electrónicos orgánicos.
El desarrollo de materiales con transporte de carga equilibrado (ambipolaridad) es un desafío clave.
La incorporación de espaciadores π rígidos como el etileno puede influir en las propiedades electrónicas del polímero.

Objetivo del estudio:

Para sintetizar y caracterizar nuevos copolímeros conjugados que contienen unidades de tiadiazoloquinoxalina y tiofeno.
Investigar las propiedades electrónicas, particularmente la movilidad del portador de carga, de estos nuevos materiales.
Explorar el potencial de los enlaces triples dentro de la columna vertebral del polímero para lograr un comportamiento semiconductor ambipolar.

Principales métodos:

Síntesis de dos copolímeros conjugados: PPTQT y PTTQT.
Utilizando espacios π de etileno para enlazar las fracciones de tiadiazoloquinoxalina y tiofeno.
Caracterización de las propiedades de los materiales, incluida la movilidad del portador de carga (agujero y electrón).

Principales resultados:

Síntesis exitosa de los copolímeros PPTQT y PTTQT.
El PPTQT exhibió una movilidad de agujero máxima de 0,028 cm2/V s y una movilidad de electrones de 0,042 cm2/V s.
PPTQT representa el primer material semiconductor ambipolar con enlaces triples en su columna vertebral de polímero.

Conclusiones:

Los copolímeros basados en tiadiazoloquinoxalina desarrollados muestran características semiconductoras prometedoras.
La incorporación de espaciadores π de etileno y enlaces triples es efectiva para lograr el transporte de carga ambipolar.
Estos materiales tienen potencial para aplicaciones en dispositivos electrónicos orgánicos avanzados.

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