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Semiconductores n-canales y ambipolares estables al aire, procesables en solución para transistores de película
Hakan Usta1, Antonio Facchetti, Tobin J Marks
1Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
Journal of the American Chemical Society
|June 12, 2008
Resumen
Los investigadores desarrollaron nuevos semiconductores orgánicos, TIFDMT y P-IFDMT4, para dispositivos electrónicos. Estos materiales muestran un alto rendimiento y una excelente estabilidad al aire, allanando el camino para la electrónica orgánica avanzada.
Área de la Ciencia:
- La electrónica orgánica es la electrónica orgánica.
- Ciencia de los materiales ciencia de los materiales.
- La investigación en semiconductores es muy importante.
Sus antecedentes:
- El desarrollo de semiconductores orgánicos de alto rendimiento es crucial para las aplicaciones electrónicas avanzadas.
- Los materiales existentes a menudo se enfrentan a desafíos con la estabilidad del aire y la procesabilidad.
- Se necesitan nuevos diseños moleculares para superar estas limitaciones.
Objetivo del estudio:
- Para sintetizar y caracterizar una nueva molécula semiconductora de n canales, TIFDMT, y un copolímero basado en tiofeno, P-IFDMT4.4.
- Evaluar el rendimiento del efecto de campo y la estabilidad al aire de los dispositivos basados en estos nuevos materiales.
- Demostrar el potencial de los polímeros ambipolares procesables en solución y estables al aire.
Principales métodos:
- Síntesis y caracterización de TIFDMT y P-IFDMT4.
- Fabricación de transistores de efecto de campo utilizando un recubrimiento de espín.
- Pruebas de rendimiento de dispositivos en el aire, incluida la movilidad, la tensión de encendido y las mediciones de la relación encendido/apagado.
- Evaluación de la estabilidad del dispositivo en condiciones ambientales.
Principales resultados:
- Los transistores basados en TIFDMT lograron altas movilidades de electrones (0,10-0,16 cm2/V s) con bajos voltajes de encendido (0 a +5 V) y altas relaciones encendido/apagado (10(7) -10(8).
- Estos dispositivos TIFDMT demostraron una excelente estabilidad al aire durante el almacenamiento prolongado.
- Los dispositivos basados en P-IFDMT4 representan el primer ejemplo de un polímero ambipolar estable al aire procesable a partir de una solución.
Conclusiones:
- El nuevo núcleo indenofluorenebis (dicianovinileno) permite semiconductores orgánicos de n canales de alto rendimiento.
- Los materiales desarrollados ofrecen una excelente estabilidad al aire, un factor crítico para aplicaciones electrónicas prácticas.
- P-IFDMT4 es un material prometedor para el desarrollo de dispositivos electrónicos orgánicos ambipolares estables y procesables en solución.
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