Yellow tungsten oxide electrochromic film can be used to prepare a new type of high-performance large area electrochromic glass – a smart energy saving glass. According to reports, more than 80% of buildings in the United States use electrochromic glass, saving 5% of electricity per year. As a result, the US government provided guarantees to provide different amounts of loans and government grants to several of its local companies.
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Wherein, a certain company began to produce large-area electrochromic glass in small batches in 2006. In the past few years, the company has built a new plant in Minnesota, USA, and has begun to mass-produce large-area electrochromic glass mainly by magnetron sputtering coating technology. The product consists of hollow glass with double glasses and hollow glass with three glasses. The electrochromic layer is plated on the second layer of glass from the outside to the inside, the visible light transmittance is adjustable between 55% and 1%, the solar heat gain coefficient is adjustable between 0.42 and 0.02, and the heat transfer coefficient is as low as 1.08W/(m2?K), with a maximum size of 1.5m×3.0m, passed the 100000 time color-changing cycle test under outdoor sunlight, and was field-proven in several demonstration projects of American universities. So, it is well known as one of the mature technologies.
