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La combinación de bloques de construcción neutros por electrones con "bloques de conformación" intramoleculares
Hui Huang1, Zhihua Chen, Rocio Ponce Ortiz
1Department of Chemistry and the Materials Research Center, Northwestern University, Evanston Illinois 60208, USA.
Journal of the American Chemical Society
|June 12, 2012
Resumen
Los nuevos semiconductores de tienila-vinilo (TVT) permiten una electrónica orgánica de alto rendimiento. Estos materiales estables y planos ofrecen una alta movilidad del portador de carga para los avanzados transistores orgánicos de película delgada (TFT) y circuitos.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Electrónica orgánica y electrónica orgánica.
- Física de los semiconductores Física de los semiconductores
Sus antecedentes:
- La electrónica orgánica de alto rendimiento requiere comprender el impacto de la arquitectura molecular en el rendimiento del transistor orgánico de película delgada (TFT).
- El desarrollo de semiconductores poliméricos planos y neutros en electrones es un objetivo clave, pero se enfrenta a desafíos sintéticos.
Objetivo del estudio:
- Sintetizar y caracterizar una nueva clase de semiconductores orgánicos estables, planos y de alta movilidad basados en un bloque de construcción de tienila-vinila (TVT).
- Investigar la relación entre la estructura del bloque de construcción de TVT y las propiedades electrónicas del semiconductor resultante y el rendimiento del dispositivo.
Principales métodos:
- Utilizó un bloque de construcción de TVT de fácil acceso y neutro en electrones con "cerraduras conformacionales" S··O intramoleculares.
- Computaciones empleadas de la Teoría Funcional de Densidad (DFT), difracción de rayos X y métricas de cohesión en celosía.
- Fabricados y probados transistores orgánicos de película delgada (TFT) y circuitos de inversores complementarios.
Principales resultados:
- Se obtienen semiconductores moleculares y macromoleculares estables, estructuralmente planos y procesables en solución.
- Se ha demostrado una alta movilidad del portador en el aire: 0,5 cm2/V·s (tipo n) y 0,05 cm2/V·s (tipo p).
- Inversores complementarios de polímero fabricados totalmente de TVT con ganancias de alto voltaje (~50) y osciladores de anillo con altas frecuencias de oscilación (~1.25 kHz) a través de la impresión por inyección de tinta.
Conclusiones:
- El bloque de construcción de TVT, con su débil riqueza de electrones y planarización supramolecular, es eficaz para crear semiconductores orgánicos de alto rendimiento.
- Estos materiales son prometedores para la electrónica orgánica de próxima generación, incluyendo circuitos imprimibles de alta ganancia y osciladores de alta frecuencia.
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