| Smart glass is of importance for energy saving of building. In this study, self-made vanadium oxide nano-powders were uniformly dispersed into tungsten-sol, and the supernatant was spin-coated on ITO substrate. The film was dried at room temperature for 5 min, then dried at 100°C for 3 h, and finally annealed at 300°C for 10 min in air. The experimental results showed that the composite films have both the thermochromic and electrochromic properties. After power is turned on, the composite films exhibit typical electrochromic characteristics, and the visible and near-infrared light transmittance decrease significantly. During the annealing process, a part of tungsten element is doped into the VO2, and the thermally induced phase transition temperature of the composite film is reduce about 10°C. Under the double response condition, the visible light transmittance of the composite film is 32.6%, and the regulated efficiency is 18.8%. |
