Tungsten Oxide Film Applied for Large Area Electrochromic Glass

Tungsten oxide film is considered to be the most promising inorganic electrochromic material for large-scale production of large area electrochromic glass. Therefore, WO3 powder and WO3 electrochromic film and even WO3 electrochromic device have received great attention. So why large area smart glass is a focus in the construction sector?

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One of the reasons is building energy consumption. The data shows that China's building energy consumption accounts for about 28% of total social energy consumption currently. In this regard, experts said that if the energy consumption of new buildings is not controlled, it is expected to exceed industrial energy consumption by 2030, reaching about 40% of the total energy consumption of the whole society and becoming the largest energy consumption in the whole society. As windows are the main source of energy loss in buildings – about 30%-50% of energy is lost through windows. In China, this problem is particularly serious. In the existing buildings of about 44 billion square meters, more than 85% of the buildings used are common glass with poor heat preservation and heat insulation performance, so they will lead to high energy consumption. The direct consequence is that the average building energy consumption in China is more than three times that of developed countries. In this regard, the Ministry of Construction has proposed that by 2020, all new buildings need to achieve the goal of 65% energy conservation. To achieve this goal, the use of energy-saving glass has become an inevitable choice. Nowadays, many glasses are large-area glass, which means that the applied energy-saving glass is relatively large. That is to say, environmentally-friendly tungsten oxide large-area electrochromic glass of high energy-saving performance is expected to be widely used.

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