Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 155, Issue -, Pages 411-420Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2016.06.029
Keywords
Electrochromic (EC); Monolithic single-substrate device; Durability; Solid proton-electrolyte film (Nafion); Tungsten trioxide (WO3); Transparent conductive electrode; Room-temperature (RT) fabrication process
Funding
- Progetto MAAT-Molecular NAnotechnology for HeAlth and EnvironmenT [PON02_00563_3316357]
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Herein, we present, for the first time, the features of a full solid-state electrochromic (EC) device fabricated on a single substrate, made of glass as well as flexible plastic, adopting a low-cost, eco-friendly, and facile fabrication process. By combining a solution processing of Nafion electrolyte film and RF sputtering deposition at room temperature (RT) on Nafion, we obtained monolithic systems with a simplified architecture (substrate/ITO/WO3/Nafion/ITO) in which a suitable Nafion film (8 mu m thick) tightly shares its interfaces with the WO3 layer and the highly transparent and conductive RF-sputtered ITO film. Compared to conventional sandwich-type EC devices using semi-solid or liquid electrolytes, the resulting devices exhibited a strong enhancement in terms of interface properties, robustness, cyclic stability, and long-term durability (at least 1000 chronoamperometric cycles). Moreover, electro-optical characterizations highlighted high transmittance modulation (49% at 650 nm), astonishing results in terms of coloration efficiency (139 cm(2)/C), and low energy absorption (80 mW s/cm(2)). (C) 2016 Elsevier B.V. All rights reserved.
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