Mejora de películas delgadas conductoras y transparentes de nanocables de plata mediante tratamientos mecánicos y térmicos
Palabras clave:
Nanohilos de plata, electrodos transparentes, recocido térmico, prensado mecánico, ITOBarra lateral del artículo
Contenido principal del artículo
Introducción: El ITO es ampliamente usado en electrodos transparentes, pero su fragilidad y la escasez de indio limitan aplicaciones flexibles. Las películas de nanohilos de plata (AgNW) ofrecen una alternativa prometedora por su alta conductividad y flexibilidad mecánica.
Objetivo: Se evaluaron el recocido térmico y el prensado mecánico como tratamientos post-deposición para mejorar las propiedades eléctricas y ópticas de películas de AgNW.
Métodología: Se depositaron películas de AgNW sobre sustratos de vidrio y PET por spin-coating y se trataron térmicamente (130–225 °C) o mecánicamente (2–10 tnf). Se emplearon mediciones de cuatro puntas, espectroscopía UV–Vis y SEM.
Resultados: Las películas iniciales presentaron resistencias de hoja inferiores a 30 Ω/sq y transmitancias cercanas al 75 % a 530 nm. El recocido a 165 °C durante 22,5 min redujo la resistencia en (50 ± 3) % sin pérdidas ópticas significativas. El prensado a 4 tnf durante 20 s logró una reducción de (76 ± 2) %, aunque la transmitancia disminuyó ~9 puntos porcentuales por densificación.
Conclusiones: Ambos tratamientos mejoran efectivamente el desempeño eléctrico de las redes de AgNW, posicionándolas como sustitutos viables del ITO en electrodos transparentes flexibles.
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