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Semiconductores poliméricos basados en biotiofeno-imida para transistores de efecto de campo: síntesis, correlaciones
Xugang Guo1, Rocio Ponce Ortiz, Yan Zheng
1Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|January 7, 2011
Resumen
Los nuevos polímeros basados en BTI ofrecen un mejor transporte de carga para la electrónica orgánica. Ciertos copolímeros BTI demuestran una excelente estabilidad al aire para el transporte de agujeros, crucial para el desarrollo de robustos transistores orgánicos de efecto de campo (OFET).
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:
- El desarrollo de semiconductores poliméricos de alta movilidad con estabilidad ambiental es clave para el avance de la electrónica orgánica.
- Los polímeros basados en BTI se exploran por su potencial en los transistores orgánicos de efecto de campo (OFET).
Objetivo del estudio:
- Para sintetizar y caracterizar nuevos polímeros basados en BTI.
- Para investigar el efecto de la longitud de conjugación y el peso molecular en la movilidad del portador de carga y el rendimiento del dispositivo.
- Evaluar la estabilidad al aire de los OFET basados en estos nuevos polímeros.
Principales métodos:
- Síntesis de homopolímeros y copolímeros de BTI con diferentes longitudes de conjugación.
- Caracterización de las propiedades del polímero, incluida la movilidad de la carga portadora.
- Fabricación y prueba de transistores orgánicos de efecto de campo (OFET) en diferentes arquitecturas.
- Evaluación del rendimiento y la estabilidad del dispositivo en condiciones ambientales.
Principales resultados:
- El aumento de la longitud de conjugación en los copolímeros BTI cambia el transporte de electrón-dominante a agujero-dominante.
- P(BTimR) de alto peso molecular exhibe una mayor movilidad de electrones (0,14 cm2/V·s) pero una baja estabilidad en el aire.
- Los copolímeros P2 y P3 de BTI muestran mejoras significativas en la estabilidad del aire para el transporte de agujeros, manteniendo la movilidad durante 200 días.
- P3 logra una movilidad de agujero cercana a 0,1 cm2/V·s, comparable a los polímeros de tipo p de última generación.
Conclusiones:
- Los bloques de construcción de BTI mejoran la estabilidad del aire de los OFET de tipo p debido a los HOMOs de baja altura.
- Los polímeros BTI desarrollados son prometedores para la electrónica orgánica tipo p estable y de alto rendimiento.
- Los inversores complementarios se fabricaron con éxito utilizando el patrón de inyección de tinta.
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