Electrochromic Nb-doped WO3 films: Effects of post annealing
Source abstract
Abstract
Abstract The Nb-doped WO 3 films were deposited by e-beam co-evaporation method using ceramic WO 3 targets and metal Nb slugs. The films were analyzed by glancing incident angle X-ray diffraction (GIAXRD), UV/visible spectrophotometer, electrochemical cyclic voltammetry, X-ray photoelectron spectroscopy (XPS). The as-prepared film is brown and amorphous in structure. The film has low transmission in optical visible region. The XPS results indicate that the as-deposited film is non-stoichiometric. By applying a negative potential, the as-deposited film does not show obvious electrochromic effect. However, the electrochromic properties of Nb-doped WO 3 films are improved by post annealing treatment at 350, 400, and 450 °C in oxygen atmosphere. The Nb-doped WO 3 films transform into crystalline structure and become transparent after post annealing treatment. The energy band gap, optical modulation, and color efficiency increase with annealing temperature.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Transition Metal Oxide Nanomaterials · Gas Sensing Nanomaterials and Sensors · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (27)
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1. Granqvist · 1995
2. A novel electrophotographic system10.1364/AO.8.S1.000192 ↗
3. Electrochromic properties of WO3 as a single layer and in a full device: from the visible to the infrared10.1016/j.jpcs.2009.12.069 ↗
4. Preparation of tungsten oxide nanoporous thin film at carbon ceramic electrode for electrocatalytic applications10.1016/j.electacta.2011.04.018 ↗
5. Microstructure of laser-fired, sol–gel-derived tungsten oxide films10.1021/cm950570b ↗
6. IR electrochromic WO3 thin films: from optimization to devices10.1016/j.solmat.2009.05.003 ↗
7. Depth profiling of W, O and H in tungsten trioxide thin films using RBS and ERDA techniques10.1016/0169-4332(95)00173-5 ↗
8. Optical properties of Li+ doped electrochromic WO3 thin films10.1016/S0040-6090(00)01378-X ↗
9. Role of water in gasochromic WO3 films10.1016/S0040-6090(00)01865-4 ↗
10. Deposition of electrochromic tungsten oxide thin films by plasma-enhanced chemical vapor deposition10.1149/1.1837528 ↗
11. Electrochromic behavior of WO3 nanotree films prepared by hydrothermal oxidation10.1016/j.solmat.2011.03.008 ↗
12. Visible light photoelectrochemical responsiveness of self-organized nanoporous WO3 films10.1016/j.electacta.2010.06.025 ↗
13. Optical and electrochemical characteristics of sol–gel deposited tungsten oxide films: a comparison10.1016/S0040-6090(97)00218-6 ↗
14. Electrochromic properties of niobium oxide thin films prepared by DC magnetron sputtering10.1149/1.1837947 ↗
15. Electrochemical and chromogenics kinetics of lithium intercalation in anodic niobium oxide films10.1149/1.2086161 ↗
16. Nanosized WO3 thin film as a multifunctional hydrogen material for achieving photolysis in CuCl films via hydrogen photosensitization10.1016/j.solmat.2009.11.016 ↗
17. Caner durucan, structural, electrochemical and optical comparisons of tungsten oxide coatings derived from tungsten powder-based sols10.1016/j.tsf.2009.06.050 ↗
18. Microstructural and electrochromic properties of tungsten oxide thin films produced by surfactant mediated electrodeposition10.1016/j.apsusc.2007.09.035 ↗
19. Electrochromic W–M–O (M=V, Nb) sol–gel thin films: a way to neutral colour10.1016/S0927-0248(01)00092-7 ↗
20. Electrochromic behavior of Mo/W oxides related to their surface morphology and intercalation process parameters10.1016/j.mseb.2007.06.020 ↗
21. Influence of Nb doping on the electrochromic properties of WO3 films10.1088/0022-3727/40/23/025 ↗
22. Lifetime of electrochromism of amorphous WO3–TiO2 thin films10.1149/1.2085985 ↗
23. Influence of nitrogen doping on the sputter-deposited WO3 films10.1016/j.tsf.2009.09.060 ↗
24. Intercalation in WO3 and WO3: Li films10.1016/j.ssi.2003.08.013 ↗
25. Optical characterization of europium diphthalocyanine thin films10.1016/S0167-577X(02)01177-1 ↗
26. Effect of the tungsten oxidation states in the thermal coloration and bleaching of amorphous WO3 films10.1016/S0040-6090(00)01828-9 ↗
27. Characterization techniques employed in the study of niobium and tantalum-containing materials10.1016/S0920-5861(02)00353-X ↗