Pulsed Magnetron Sputtering of Strongly Thermochromic VO2-Based Coatings with a Transition Temperature of 22 °C onto Ultrathin Flexible Glass
| Autor: | Stanislav Haviar, Jaroslav Vlček, John Fahlteich, J. Houska, Matthias Fahland, Radomír Čerstvý, Jolanta Szelwicka, Tomáš Bárta |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Diffraction
Vanadium Dioxide Materials science pulsed magnetron sputtering 02 engineering and technology engineering.material low transition temperature 7. Clean energy 01 natural sciences Coating Spectrophotometry 0103 physical sciences Materials Chemistry medicine Transmittance ultrathin flexible glass 010302 applied physics Thermochromism medicine.diagnostic_test business.industry Transition temperature reactive pulsed magnetron sputtering Pulsed DC Surfaces and Interfaces low deposition temperature Sputter deposition 021001 nanoscience & nanotechnology strongly thermochromic coatings Surfaces Coatings and Films smart windows lcsh:TA1-2040 engineering Optoelectronics lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology business |
| Zdroj: | Coatings Volume 10 Issue 12 Coatings, Vol 10, Iss 1258, p 1258 (2020) |
| Popis: | The reversible semiconductor-to-metal transition of vanadium dioxide (VO2) makes VO2-based coatings a promising candidate for thermochromic smart windows, reducing the energy consumption of buildings. This paper deals with maximizing the application potential of these coatings in terms of their performance, an industry-friendly preparation technique, and an industrially relevant substrate. We present a scalable sputter deposition technique for the preparation of strongly thermochromic ZrO2/V0.984W0.016O2/ZrO2 coatings on ultrathin flexible glass and standard glass at a relatively low substrate surface temperature (330 ° C) and without any substrate bias voltage. The V0.984W0.016O2 layers were deposited by a controlled high-power impulse magnetron sputtering of a V target, combined with a simultaneous pulsed dc magnetron sputtering of a W target. We explain the fundamental principles of this technique using the discharge characteristics measured for both discharges. We characterize the coating structure (X-ray diffraction) and a wide range of optical properties (spectrophotometry and spectroscopic ellipsometry). We find that the coatings combine a transition temperature of 22 ° C, a luminous transmittance approaching 50%, a modulation of the solar energy transmittance over 10% and a temperature-independent color. The results in general, and the successful transfer from a standard glass to the ultrathin flexible glass in particular, are crucial for future applications of the coatings on smart windows. |
| Databáze: | OpenAIRE |
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