Researchers at Lawrence Berkeley National Laboratory have developed a new material that can change the pass rate of sunlight on glass. Unlike current technology, this thin, nanocrystalline coating embedded in glass enables selective control of luminous flux. This new type of smart window allows the user to control and select how much visible light, as well as heat-generating near-infrared light passes, in addition to increasing the user's comfort, but also to maximize energy savings.
Smart windows can control light flux and heat flux, and therefore have a wide range of climatic applications.
By linking tin-doped indium oxide nanocrystals with an amorphous yttria matrix, the lab has developed a dual-band "electrochromic material."
These transparent films block solar radiation in a controlled manner. The user can select and dynamically adjust the light and heat through the window.
Research team (from left to right): Guillermo Garcia, Delia Milliron, and Anna Llordés.
According to Delia Milliron, a molecular casting chemist at the Berkeley Laboratory who led the study, Americans spend 25% of their energy on building lighting, cooling, and heating, and this energy-efficient window coating new material is available. It will have a major impact on this.
This technology recently won the 2013 R&D Award and is currently in the process of commercialization.
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