Open AccessVanadium dioxide nanogrid films for high transparency smart architectural window applications
Author(s) -
Chang Liu,
Igal Balin,
Shlomo Magdassi,
Ibrahim Abdulhalim,
Yi Long
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.00a124
Subject(s) - transmittance , finite difference time domain method , materials science , vanadium dioxide , thermochromism , modulation (music) , optics , optoelectronics , window (computing) , infrared , grid , thin film , computer science , nanotechnology , acoustics , physics , geometry , mathematics , condensed matter physics , operating system
This study presents a novel approach towards achieving high luminous transmittance (T(lum)) for vanadium dioxide (VO(2)) thermochromic nanogrid films whilst maintaining the solar modulation ability (ΔT(sol)). The perforated VO(2)-based films employ orderly-patterned nano-holes, which are able to favorably transmit visible light dramatically but retain large near-infrared modulation, thereby enhancing ΔT(sol). Numerical optimizations using parameter search algorithms have implemented through a series of Finite Difference Time Domain (FDTD) simulations by varying film thickness, cell periodicity, grid dimensions and variations of grid arrangement. The best performing results of T(lum) (76.5%) and ΔT(sol) (14.0%) are comparable, if not superior, to the results calculated from nanothermochromism, nanoporosity and biomimic nanostructuring. It opens up a new approach for thermochromic smart window applications.