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Películas delgadas de nanocables de plata de limpieza electroquímica rápida para conductores transparentes de alto
Yongjie Ge1, Jianfang Liu1, Xiaojun Liu1
1State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering , Hunan University , Changsha 410082 , China.
Journal of the American Chemical Society
|July 31, 2019
Resumen
Un nuevo método de limpieza electroquímica elimina rápidamente los ligandos de polivinilpirrolidona (PVP) de las películas delgadas de nanocables de plata (Ag-NW). Este proceso mejora significativamente el transporte de portadores, mejorando la conductividad y el rendimiento en dispositivos optoelectrónicos.
Área de la Ciencia:
- Ciencias de los materiales
- La electroquímica
- Nanotecnología
Sus antecedentes:
- Las películas delgadas de nanocables de plata (Ag-NW) son prometedoras para los conductores transparentes.
- Los ligandos residuales de polivinilpirrolidona (PVP) obstaculizan sus propiedades de transporte de portadores.
Objetivo del estudio:
- Desarrollar una estrategia de limpieza electroquímica rápida para eliminar los ligandos PVP de las superficies Ag-NW.
- Mejorar significativamente las propiedades de transporte de portadores de películas delgadas de Ag-NW sin comprometer la transmitancia.
Principales métodos:
- Se aplica un potencial electroquímico negativo cerca del régimen de adsorción/evolución de hidrógeno.
- Se logra un desplazamiento efectivo del ligando PVP en 5 a 15 segundos.
- Se han creado interfaces ultralimpias en las uniones Ag-NW/Ag-NW y en las uniones Ag-NW película/capa activa.
Principales resultados:
- Reducción de la resistencia de las láminas delgadas Ag-NW de 49 a 13 ohm/sq (manteniendo el 90,91% de la transmitancia a 550 nm).
- Disminución de la resistencia interfacial en la interfaz película/capa activa Ag-NW en un 94,3%.
- Sensibilidad mejorada en sensores de deformación portátiles y eficiencia de recolección de corriente en dispositivos optoelectrónicos apilados.
Conclusiones:
- La limpieza electroquímica es muy eficaz para eliminar los ligandos superficiales de Ag-NW.
- Este método mejora sustancialmente tanto el transporte en avión como el transporte fuera de avión.
- El enfoque facilita aplicaciones más amplias de películas delgadas de Ag-NW en electrónica y optoelectrónica.
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