具有低光学常数、高光透射率和热致变色性能的纳米多孔热致变色 VO(2)薄膜。

Nanoporous thermochromic VO(2) films with low optical constants, enhanced luminous transmittance and thermochromic properties.

出版信息

ACS Appl Mater Interfaces. 2011 Feb;3(2):135-8. doi: 10.1021/am1011172. Epub 2011 Jan 26.

Abstract

Nanoporous thermochromic VO(2) films with low optical constants and tunable thicknesses have been prepared by polymer-assisted deposition. The film porosity and thickness change the interference relationship of light reflected from the film-substrate and the air-film interfaces, strongly influencing the optical properties of these VO(2) films. Our optimized single-layered VO(2) films exhibit high integrated luminous transmittance (T(lum,l) = 43.3%, T(lum,h) = 39.9%) and solar modulation (ΔT(sol) = 14.1%, from T(sol,l) = 42.9% to T(sol,h) = 28.8%), which are comparable to those of five-layered TiO(2)/VO(2)/TiO(2)/VO(2)/TiO(2) films (T(lum,l) = 45%, T(lum,h) = 42% and ΔT(sol) = 12%, from T(sol,l) = 52% to T(sol,h) = 40%, from Phys. Status Solidi A2009, 206, 2155-2160.). Optical calculations suggest that the performance could be further improved by increasing the porosity.

摘要

通过聚合物辅助沉积法制备了具有低光学常数和可调厚度的纳米多孔热致变色 VO(2) 薄膜。薄膜的孔隙率和厚度改变了从薄膜-衬底和空气-薄膜界面反射的光的干涉关系，强烈影响了这些 VO(2) 薄膜的光学性质。我们优化的单层 VO(2) 薄膜表现出高的综合光透过率（T(lum,l) = 43.3%，T(lum,h) = 39.9%）和太阳调制（ΔT(sol) = 14.1%，从 T(sol,l) = 42.9%到 T(sol,h) = 28.8%），与五层 TiO(2)/VO(2)/TiO(2)/VO(2)/TiO(2) 薄膜相当（T(lum,l) = 45%，T(lum,h) = 42%和 ΔT(sol) = 12%，从 T(sol,l) = 52%到 T(sol,h) = 40%，来自 Phys. Status Solidi A2009, 206, 2155-2160.）。光学计算表明，通过增加孔隙率可以进一步提高性能。