Cesium tungsten bronze, with the formula of CsxWO3, is a very important functional material for preparing transparent conductive thin film as cesium tungsten bronze nano particles possess more excellent visible light transmittance, electronic conductivity and UV/IR shielding ability than tungsten trioxide and even commercial ITO glass materials. Therefore, CsxWO3 also has extremely high-potential applications in smart window materials and biomedical materials.

Cesium tungsten bronze particles are applied for preparing heat insulation coating as they have good shielding performance to near-infrared rays and high transmittance to visible light. In other words, heat insulation coating of cesium tungsten bronze particles shields heat radiation in the sunlight without influencing the day lighting. Also, cesium tungsten bronze nanoparticles have significant catalytic property.

Cesium tungsten bronze, or CsxWO3, is known as a near infrared absorbing material because it can selectively absorb near-infrared light, through local surface plasmon resonance and polaron resonance. Well, how to prepare cesium tungsten bronze?

Hexagonal cesium tungsten bronze, as a near infrared shielding material, is more and more widely used to prepare heat insulation film or thermal insulation coating for applying to glasses of buildings and automobiles. According to the experts, the mechanism of low-energy optical absorptions in cesium tungsten bronze is still a matter of controversy, although plasmon and polaron mechanisms have been proposed as a dominant cause. So, they studied hexagonal cesium tungsten bronze nanoparticles to find the systematic analysis results on structural and optical changes with varied amount of oxygen vacancy (VO) and alkali content.