Two-Dimensional SiO2/VO2 Photonic Crystals with Statically Visible and Dynamically Infrared Modulated for Smart Window Deployment.

Citation:

Ke Y, Balin I, Wang N, Lu Q, Tok AIY, White TJ, Magdassi S, Abdulhalim I, Long Y. Two-Dimensional SiO2/VO2 Photonic Crystals with Statically Visible and Dynamically Infrared Modulated for Smart Window Deployment. ACS Appl. Mater. InterfacesACS Applied Materials & Interfaces. 2016;8 (48) :33112 - 33120.

Date Published:

2016///

Abstract:

Two-dimensional (2D) photonic structures, widely used for generating photonic band gaps (PBG) in a variety of materials, are for the 1st time integrated with the temp.-dependent phase change of VO2. VO2 possesses thermochromic properties, whose potential remains unrealized due to an undesirable yellow-brown color. A SiO2/VO2 core/shell 2D photonic crystal is demonstrated to exhibit static visible light tunability and dynamic near-IR (NIR) modulation. Three-dimensional (3D) finite difference time domain (FDTD) simulations predict that the transmittance can be tuned across the visible spectrum, while maintaining good solar regulation efficiency (ΔTsol = 11.0%) and high solar transmittance (Tlum = 49.6%). The color changes of VO2 films are accompanied by NIR modulation. This work presents a novel way to manipulate VO2 photonic structures to modulate light transmission as a function of wavelength at different temps. [on SciFinder(R)]

Notes:

CAPLUS AN 2016:1872125(Journal; Online Computer File)