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Title: Nanoporous thermochromic VO2 (M) thin films : controlled porosity, largely enhanced luminous transmittance and solar modulating ability
Authors: Cao, Xun
Wang, Ning
Law, Jia Yan
Loo, Say Chye Joachim
Magdassi, Shlomo
Long, Yi
Keywords: DRNTU::Engineering::Materials
Issue Date: 2014
Source: Cao, X., Wang, N., Law, J. Y., Loo, S. C. J., Magdassi, S., & Long, Y. (2014). Nanoporous Thermochromic VO2 (M) Thin Films: Controlled Porosity, Largely Enhanced Luminous Transmittance and Solar Modulating Ability. Langmuir, 30(6), 1710–1715.
Series/Report no.: Langmuir
Abstract: Vanadium dioxide is the most widely researched thermochromic material with a phase transition temperature (τc) of around 68 °C, and its thermochromic performance can be enhanced by adding nanoporosity. Freeze-drying has been employed to fabricate nanostructures with different porosities from 16 to 45% by varying the prefreezing temperature and precursor concentration. The luminous transmittance (Tlum) and solar modulating ability (ΔTsol) are greatly enhanced as a result of increasing pore size and pore density. The freeze-dried sample with 7.5 mL of H2O2 precursor dip-coated at 300 mm/min gives the best combination of thermochromic properties (Tlum ≈ 50%, ΔTsol = 14.7%), which surpasses the best combined thermochromic performance reported to date that we are aware of (Tlum ≈ 41%, ΔTsol = 14.1%).
DOI: 10.1021/la404666n
Rights: © 2014 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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