University scientists in Singapore develop new electrochromic window technology

Scientists from Nanyang Technological University in Singapore have manufactured a new component for electrochromic windows which allows influence over transmission of heat but does not compromise the view looking outside.

A huge benefit of this innovative material is that it could reduce the amount of energy needed to heat or cool buildings. It is made up of titanium dioxide, tungsten trioxide, neodymium-Niobium, and tin oxide. The purpose of this is to glaze window panels so people can choose how much infrared radiation is passed through. This innovation has the potential to stop 70% of infrared radiation yet doesn’t have an impact on the field of vision because it still lets 90% of visible light be transmitted.

It has been said that this is 30% better at managing heat compared to regular electrochromic windows which are tinted when being used. This minimises the amount of light coming into the room, but they only block the visible light, meaning that heat transmission still occurs.

The current electrochromic windows are also inclined to break down and become less effective after less than 5 years of use. The recent technology was assessed to test its’ performance, with conclusions showing that the window features had ‘excellent stability,’ preventing more than 65% of infrared radiation.

Lead author, Associate Professor Alfred Tok, said “By incorporating the specially designed nanostructure, we enabled the material to react in a ‘selective’ manner, blocking near infrared radiation while still allowing most of the visible light to pass through whenever our electrochromic window is switched on. The choice of advanced materials also helped improved the performance, stability and durability of the smart window.”