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二氧化钒(VO_2)温控智能节能窗是建筑节能领域的研究热点,但其发射率高,影响了节能效果的进一步提升.本文从金属银纳米线微网结构的宽波段光学调制作用出发,设计并制备了AgNW/VO_2多层复合结构.该新型复合薄膜兼具优良热致变色和低发射率双重特征.研究结果表明:与直接镀制于VO_2表面的AZO,Pt等结构相比,准连续Ag纳米线微网结构在降低发射率?和保持VO_2相变前后的太阳热调节效率ΔTsol方面具有明显优势.对于镀制于石英玻璃上的单层VO_2薄膜来讲,通过优化AgNWs的涂覆厚度,可将发射率降低至0.21,同时ΔTsol仍保持5.8%.本研究表明这种复合结构对提升VO_2节能涂层的节能效果明显.
The temperature-controlled intelligent energy-saving window of vanadium dioxide (VO_2) is a hotspot in the field of building energy efficiency, but its emissivity is high, which affects the further improvement of energy-saving effect.In this paper, based on the wideband optical modulation of metallic silver nanowire The multi-layer AgNW / VO_2 composite structure was designed and fabricated.The novel composite film has the dual characteristics of excellent thermochromism and low emissivity.The results show that compared with the structure of AZO and Pt directly coated on the surface of VO_2 The continuous Ag nanowire microgrid structure has obvious advantages in reducing the emissivity and maintaining the solar thermal regulation efficiency ΔTsol before and after VO2 transformation.For the single-layer VO_2 thin film plated on quartz glass, by optimizing the coating of AgNWs Thickness, the emissivity can be reduced to 0.21, while the ΔTsol remains 5.8% .This study shows that this composite structure to enhance the energy-saving VO_2 energy-saving coating effect is obvious.