Abstract
Silver nanowires (AgNWs) networks are promising candidates for the replacement of indium tin oxide (ITO). However, the surface roughness of the AgNWs network is still too high for its application in optoelectronic devices. In this work, we have reduced the surface roughness of the AgNWs networks to 6.4 nm, compared to 33.9 nm of the as-deposited AgNWs network through the hot-pressing process, treatment with poly (3,4ethylenedioxythiophene)–poly (styrenesulfanate), and covered with graphene films. Using this method, we are able to produce AgNWs/PEDOT: PSS/SLG composite films with the transmittance and sheet resistance of 88.29% and 30 Ω/□, respectively. The OLEDs based on the AgNWs/PEDOT: PSS/SLG anodes are comparable to those based on ITO anodes.
Highlights
Surface roughness of the AgNWs network could be decreased from 33.9 nm to 9.5 nm, the surface wettability of AgNWs network was improve after the treatment of TiO2 sol coating
In order to explore the relationship between the sheet resistance and transmittance of the AgNWs network, we have prepared a series of films using AgNWs solution with different concentrations of 6, 4.5 and 3 mg/ml scraping coated onto quartz glass substrates
Considering the balance between high transparency and low sheet resistance, we chose the AgNWs network prepared with 3 mg/ml AgNWs solution for further processing
Summary
PEDOT: PSS and Graphene for Organic Light-Emitting Diodes received: 09 December 2016 accepted: 27 February 2017. We have reduced the surface roughness of the AgNWs networks to 6.4 nm, compared to 33.9 nm of the as-deposited AgNWs network through the hot-pressing process, treatment with poly (3,4ethylenedioxythiophene)–poly (styrenesulfanate), and covered with graphene films Using this method, we are able to produce AgNWs/PEDOT: PSS/SLG composite films with the transmittance and sheet resistance of 88.29% and 30 Ω/□, respectively. We fabricated AgNWs/ PEDOT: PSS/SLG (single-layer graphene) composite transparent conductive films with a low sheet resistance of 30 ± 5 Ω/sq and high optical transmittance above 87% in the visible spectrum. The AgNWs/PEDOT: PSS/Graphene composite transparent conductive films can be used as a great candidate to replace conventional ITO in large-area optoelectronic devices such as solar cells and touch panels
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