Nanomaterials for Smart Windows

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Nanomaterials for Smart Windows
Nanomaterials for Smart Windows

Buildings lose a large amount of energy through their windows. One way to reduce this loss is to develop energy-saving ‘‘smart’’ windows that can adapt their optical transmittances in response to environmental changes. Smart windows with thermochromic coatings dynamically control the solar heat transmittance into buildings by reversibly switching between an infrared-transparent state (when cold) and an infrared-reflective state (when hot) in response to the changes in the environmental temperature. This behavior could significantly alleviate the need for heating and air-conditioning, and thereby significantly reduce energy consumption to maintain the internal temperature.

Nanomaterials for Smart Windows

We use so-called ‘nanothermochromics’ that exploit the dispersion of VO2 nanoparticles (NPs) in a passive host matrix, and their application as coatings on glass. Compared to thin-film based coatings, nanothermochromic coatings can be produced using low-cost solution processing, and may increase the visible transmittance and infrared modulation efficiency of thermochromic windows if the shape of VO2 NPs is controlled.

Related Publications
  • 1 Y. Kim, S. Yu, J. Park, D. Yoon, A. M. Dayaghi, K. J. Kim, J. S. Ahn, J. Son*, “High-throughput roll-to-roll fabrication of flexible thermochromic coatings for smart windows with VO2 nanoparticles”, Journal of Materials Chemistry C, 6, 3451 (2018)
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