Synthesis and characterization of electrochromic plate-like tungsten oxide films by acidic treatment of electrochemical anodized tungsten

Chun Kai Wang; Chung Kwei Lin; Ching Lin Wu; Sheng Chang Wang; Jow Lay Huang

doi:10.1016/j.electacta.2013.07.204

Synthesis and characterization of electrochromic plate-like tungsten oxide films by acidic treatment of electrochemical anodized tungsten

Chun Kai Wang, Chung Kwei Lin, Ching Lin Wu, Sheng Chang Wang, Jow Lay Huang

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

25 Citations (Scopus)

Abstract

Tungsten films on ITO glass were anodized into a porous amorphous WO ₃ film morphology at 60 V. The follow-up acidic treatment of the anodized WO₃ films in H₂SO₄ solution transformed the morphology into plate-like WO₃·2H ₂O. Glancing incident X-ray diffraction and Raman scattering spectra indicated that the growth of plate-like WO₃·2H₂O films was caused by a dissolution-precipitation reaction in H₂SO ₄ solution. The plate-like WO₃·2H₂O transformed into monoclinic WO₃ by dehydration at 400 C, and it collapsed into a dense particle-like one at 500 C due to the strain of dehydration. Due to its highly porous plate-like morphology, the 400 C-annealed WO₃ film has the highest optical modulation of 52% and coloration efficiency of 71 cm²/C at 633 nm.

Original language	English
Pages (from-to)	24-31
Number of pages	8
Journal	Electrochimica Acta
Volume	112
DOIs	https://doi.org/10.1016/j.electacta.2013.07.204
Publication status	Published - 2013

Keywords

Acidic treatment
Electrochromism
Plate-like tungsten oxide films

ASJC Scopus subject areas

Electrochemistry
Chemical Engineering(all)

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10.1016/j.electacta.2013.07.204

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@article{9d3a163742a244aa951bf73c09af64d4,

title = "Synthesis and characterization of electrochromic plate-like tungsten oxide films by acidic treatment of electrochemical anodized tungsten",

abstract = "Tungsten films on ITO glass were anodized into a porous amorphous WO 3 film morphology at 60 V. The follow-up acidic treatment of the anodized WO3 films in H2SO4 solution transformed the morphology into plate-like WO3·2H 2O. Glancing incident X-ray diffraction and Raman scattering spectra indicated that the growth of plate-like WO3·2H2O films was caused by a dissolution-precipitation reaction in H2SO 4 solution. The plate-like WO3·2H2O transformed into monoclinic WO3 by dehydration at 400 C, and it collapsed into a dense particle-like one at 500 C due to the strain of dehydration. Due to its highly porous plate-like morphology, the 400 C-annealed WO3 film has the highest optical modulation of 52% and coloration efficiency of 71 cm2/C at 633 nm.",

keywords = "Acidic treatment, Electrochromism, Plate-like tungsten oxide films",

author = "Wang, {Chun Kai} and Lin, {Chung Kwei} and Wu, {Ching Lin} and Wang, {Sheng Chang} and Huang, {Jow Lay}",

year = "2013",

doi = "10.1016/j.electacta.2013.07.204",

language = "English",

volume = "112",

pages = "24--31",

journal = "Electrochimica Acta",

issn = "0013-4686",

publisher = "Elsevier Limited",

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T1 - Synthesis and characterization of electrochromic plate-like tungsten oxide films by acidic treatment of electrochemical anodized tungsten

AU - Wang, Chun Kai

AU - Lin, Chung Kwei

AU - Wu, Ching Lin

AU - Wang, Sheng Chang

AU - Huang, Jow Lay

PY - 2013

Y1 - 2013

N2 - Tungsten films on ITO glass were anodized into a porous amorphous WO 3 film morphology at 60 V. The follow-up acidic treatment of the anodized WO3 films in H2SO4 solution transformed the morphology into plate-like WO3·2H 2O. Glancing incident X-ray diffraction and Raman scattering spectra indicated that the growth of plate-like WO3·2H2O films was caused by a dissolution-precipitation reaction in H2SO 4 solution. The plate-like WO3·2H2O transformed into monoclinic WO3 by dehydration at 400 C, and it collapsed into a dense particle-like one at 500 C due to the strain of dehydration. Due to its highly porous plate-like morphology, the 400 C-annealed WO3 film has the highest optical modulation of 52% and coloration efficiency of 71 cm2/C at 633 nm.

AB - Tungsten films on ITO glass were anodized into a porous amorphous WO 3 film morphology at 60 V. The follow-up acidic treatment of the anodized WO3 films in H2SO4 solution transformed the morphology into plate-like WO3·2H 2O. Glancing incident X-ray diffraction and Raman scattering spectra indicated that the growth of plate-like WO3·2H2O films was caused by a dissolution-precipitation reaction in H2SO 4 solution. The plate-like WO3·2H2O transformed into monoclinic WO3 by dehydration at 400 C, and it collapsed into a dense particle-like one at 500 C due to the strain of dehydration. Due to its highly porous plate-like morphology, the 400 C-annealed WO3 film has the highest optical modulation of 52% and coloration efficiency of 71 cm2/C at 633 nm.

KW - Acidic treatment

KW - Electrochromism

KW - Plate-like tungsten oxide films

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VL - 112

SP - 24

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JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Synthesis and characterization of electrochromic plate-like tungsten oxide films by acidic treatment of electrochemical anodized tungsten

Abstract

Keywords

ASJC Scopus subject areas

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