High performance hybrid rGO/Ag quasi-periodic mesh transparent electrodes for flexible electrochromic devices

•The possibility of scaling producing of hybrid high stability transparent electrodes based on the composition rGO/Ag q-mesh.•The coatings are superior to ITO on flexible substrates in all major indicators: T(550nm)=84%, Rs=15Ω/sq, F=115 – ITO [25]; T(550nm)=82.2%, Rs=12.3Ω/sq, F=200 – rGO/Ag q-mesh...

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Bibliographic Details
Published in:Applied surface science 2016-02, Vol.364, p.931-937
Main Authors: Voronin, A.S., Ivanchenko, F.S., Simunin, M.M., Shiverskiy, A.V., Aleksandrovsky, A.S., Nemtsev, I.V., Fadeev, Y.V., Karpova, D.V., Khartov, S.V.
Format: Article
Language:English
Subjects:
Coating
Devices
Electrochromism
Electrodes
Flexible electrochromic device
Graphene
Magnetron sputtering
Oxides
Quasi-periodic mesh transparent electrode
Reduced graphene oxide (rGO)
self-organized template
Silver
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Summary:•The possibility of scaling producing of hybrid high stability transparent electrodes based on the composition rGO/Ag q-mesh.•The coatings are superior to ITO on flexible substrates in all major indicators: T(550nm)=84%, Rs=15Ω/sq, F=115 – ITO [25]; T(550nm)=82.2%, Rs=12.3Ω/sq, F=200 – rGO/Ag q-mesh.•The method allows mesh transparent electrodes, which similar to the electrodes parameters, obtained by conventional methods of lithography, at a much lower capital cost (10 $/m2).•Based on the obtained hybrid electrodes stably assembled electrochromic device.•An important feature of the obtained electrode is the lack of a moire pattern when forming a sandwich-structure in the electrochromic device, which is a negative feature of mesh electrodes formed by conventional methods of lithography. A possibility of creating a stable hybrid coating based on the hybrid of a reduced graphene oxide (rGO)/Ag quasi-periodic mesh (q-mesh) coating has been demonstrated. The main advantages of the suggested method are the low cost of the processes and the technology scalability. The Ag q-mesh coating is formed by means of the magnetron sputtering of silver on the original template obtained as a result of quasi-periodic cracking of a silica film. The protective rGO film is formed by low temperature reduction of a graphene oxide (GO) film, applied by the spray-deposition in the solution of NaBH4. The coatings have low sheet resistance (12.3Ω/sq) and high optical transparency (82.2%). The hybrid coatings are characterized by high chemical stability, as well as they show high stability to deformation impacts. High performance of the hybrid coatings as electrodes in the sandwich-system «electrode–electrochromic composition–electrode» has been demonstrated. The hybrid electrodes allow the electrochromic sandwich to function without any visible degradation for a long time, while an unprotected mesh electrode does not allow performing even a single switching cycle.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2015.12.182