Nano tungsten trioxide for producing windshield heat insulating coating is nano particle size tungsten trioxide doped with Cs, which has enhanced near-infrared shielding ability for turning the common windshields into smart windows.
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By means of hybrid density dingal theory (DFT) computations, the experts found that Cs-doped WO3 shows a significantly enhanced near-infrared (NIR) absorption ability for smart windows. Also, they investigated the influence of doping through the analysis of the electronic structures of pure and doped hexagonal WO3. Furthermore, this doped material, with a hexagonal tungsten bronze nanostructure, was successfully prepared via a simple one-step hydrothermal reaction. Transmission electron microscopy images showed that the as-prepared products possessed a nanorod-like morphology with diameters of about 5–10 nm. And the experts found that the Cs doped WO3 presents a better NIR absorption ability than pure WO3. The experiment and simulation results reveal that this enhanced optical property in NIR can be explained by the existence of high free electrons existing in Cs doped WO3.
