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Mezclas de polímeros semiconductores que muestran un transporte de carga estable a altas temperaturas
Aristide Gumyusenge1, Dung T Tran1, Xuyi Luo1
1Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA.
Science (New York, N.Y.)
|December 8, 2018
Resumen
El desarrollo de mezclas de polímeros semiconductores térmicamente estables permite la electrónica a alta temperatura. Esta estrategia permite la movilidad estable de los portadores en semiconductores orgánicos hasta 220°C, lo que supone un reto clave para las aplicaciones electrónicas avanzadas.
Área de la Ciencia:
- Ciencias de los materiales
- Productos electrónicos orgánicos
- Química de los polímeros
Sus antecedentes:
- El funcionamiento a altas temperaturas (>150°C) es crucial para muchas aplicaciones electrónicas.
- El logro de movilidades estables del portador en semiconductores orgánicos a temperaturas elevadas presenta un desafío significativo.
- Los materiales semiconductores orgánicos existentes a menudo se degradan o pierden su funcionalidad a altas temperaturas.
Objetivo del estudio:
- Desarrollar una estrategia general para la creación de mezclas de polímeros semiconductores térmicamente estables para la electrónica de alta temperatura.
- Para investigar las propiedades de transporte de carga de estas mezclas a temperaturas elevadas.
- Lograr una movilidad estable y elevada de los semiconductores orgánicos a más de 150°C.
Principales métodos:
- Fabricación de mezclas de polímeros que comprenden polímeros conjugados semicristalinos interpenetrantes y matrices aislantes de alta temperatura de transición de vidrio.
- Caracterización de los transistores de película delgada (TFT) basados en estas mezclas de polímeros.
- Medición de las propiedades de transporte de carga, específicamente la movilidad del agujero, a través de un amplio rango de temperatura (temperatura ambiente hasta 220 °C).
Principales resultados:
- Las mezclas de polímeros diseñados exhiben propiedades semiconductoras térmicamente estables.
- Se observó un comportamiento de transporte de carga insensible a la temperatura.
- La movilidad del agujero superior a 2,0 cm2/V·s se mantuvo desde la temperatura ambiente hasta 220°C en los TFT.
Conclusiones:
- Se ha demostrado una estrategia viable para crear semiconductores orgánicos de alta temperatura.
- Las mezclas de polímeros desarrolladas ofrecen una solución prometedora para el funcionamiento estable de dispositivos electrónicos a temperaturas elevadas.
- Este trabajo allana el camino para nuevas aplicaciones de la electrónica orgánica en ambientes térmicos exigentes.
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