Thermochromic Fenestration Based on VO2: Finally a Technology of Practical Interest?
(Room Wabash 3)
12 May 16
10:40 AM
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11:00 AM
Tracks:
Coatings for Energy Conversion and Related Processes
Vanadium-dioxide-based thermochromic thin films and nanoparticle composites can have significant transmittance for visible light, Tlum, while they are able to transmit more near-infrared solar radiation at < c than at > c, where denotes temperature and c ≈ 68°C. It has been realized for many years that these properties are of principle interest for energy efficient fenestration, but the technology has been slow to mature. This paper summarizes the state-of-the-art and points at the many advances that have been made during recent years. Specifically, I discuss how to use doping to adjust c to room temperature and to increase Tlum, how to use nanomaterials to enhance the solar energy transmittance modulation and Tlum, and how to prepare nanoparticle composites by sputtering. I also discuss thermochromic light scattering, which is a recently discovered phenomenon.