Mg/W-codoped vanadium dioxide thin films with enhanced visible transmittance and low phase transition temperature

Ning Wang; Shiyu Liu; X. T. Zeng; Shlomo Magdassi; Yi Long

doi:10.1039/c5tc01062d

Mg/W-codoped vanadium dioxide thin films with enhanced visible transmittance and low phase transition temperature

Ning Wang, Shiyu Liu, X. T. Zeng, Shlomo Magdassi, Yi Long^*

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

153 Scopus citations

Abstract

Vanadium dioxide (VO₂), with a reversible phase transition near ambient temperature, has been found to be a promising candidate for energy-saving smart windows. However, its use is constrained by its low visible transmission (T_lum) and high transition temperature (τ_c). In this paper, by codoping tungsten (W) and magnesium (Mg) in VO₂, a good combination of low τ_c (∼35°C) and high T_lum (81.3%) was achieved. The τ_c declines with decreasing Mg doping level in Mg/W-codoped samples, which is the opposite effect of doping with only Mg, suggesting a synergistic effect of the two dopants arising from the e^- and h⁺ carrier neutralization. In addition, the band gap of Mg/W-codoped VO₂ was gradually widened; this is attributed to the depressed absorption, which enhanced the T_lum.

Original language	English
Pages (from-to)	6771-6777
Number of pages	7
Journal	Journal of Materials Chemistry C
Volume	3
Issue number	26
DOIs	https://doi.org/10.1039/c5tc01062d
State	Published - 14 Jul 2015

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© The Royal Society of Chemistry.

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title = "Mg/W-codoped vanadium dioxide thin films with enhanced visible transmittance and low phase transition temperature",

abstract = "Vanadium dioxide (VO2), with a reversible phase transition near ambient temperature, has been found to be a promising candidate for energy-saving smart windows. However, its use is constrained by its low visible transmission (Tlum) and high transition temperature (τc). In this paper, by codoping tungsten (W) and magnesium (Mg) in VO2, a good combination of low τc (∼35°C) and high Tlum (81.3%) was achieved. The τc declines with decreasing Mg doping level in Mg/W-codoped samples, which is the opposite effect of doping with only Mg, suggesting a synergistic effect of the two dopants arising from the e- and h+ carrier neutralization. In addition, the band gap of Mg/W-codoped VO2 was gradually widened; this is attributed to the depressed absorption, which enhanced the Tlum.",

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T1 - Mg/W-codoped vanadium dioxide thin films with enhanced visible transmittance and low phase transition temperature

AU - Wang, Ning

AU - Liu, Shiyu

AU - Zeng, X. T.

AU - Magdassi, Shlomo

AU - Long, Yi

PY - 2015/7/14

Y1 - 2015/7/14

N2 - Vanadium dioxide (VO2), with a reversible phase transition near ambient temperature, has been found to be a promising candidate for energy-saving smart windows. However, its use is constrained by its low visible transmission (Tlum) and high transition temperature (τc). In this paper, by codoping tungsten (W) and magnesium (Mg) in VO2, a good combination of low τc (∼35°C) and high Tlum (81.3%) was achieved. The τc declines with decreasing Mg doping level in Mg/W-codoped samples, which is the opposite effect of doping with only Mg, suggesting a synergistic effect of the two dopants arising from the e- and h+ carrier neutralization. In addition, the band gap of Mg/W-codoped VO2 was gradually widened; this is attributed to the depressed absorption, which enhanced the Tlum.

AB - Vanadium dioxide (VO2), with a reversible phase transition near ambient temperature, has been found to be a promising candidate for energy-saving smart windows. However, its use is constrained by its low visible transmission (Tlum) and high transition temperature (τc). In this paper, by codoping tungsten (W) and magnesium (Mg) in VO2, a good combination of low τc (∼35°C) and high Tlum (81.3%) was achieved. The τc declines with decreasing Mg doping level in Mg/W-codoped samples, which is the opposite effect of doping with only Mg, suggesting a synergistic effect of the two dopants arising from the e- and h+ carrier neutralization. In addition, the band gap of Mg/W-codoped VO2 was gradually widened; this is attributed to the depressed absorption, which enhanced the Tlum.

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Mg/W-codoped vanadium dioxide thin films with enhanced visible transmittance and low phase transition temperature

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