Abstract
Nanoparticle TiO2 doped WO3 thin films by pulsed spray pyrolysis technique have been studied on fluorine tin doped (FTO) and glass substrate. XRD shows amorphous nature for undoped and anatase phase of TiO2 having (101) plane for nanoparticle TiO2 doped WO3 thin film. SEM shows microfibrous reticulated porous network for WO3 with 600 nm fiber diameter and nanocrystalline having size 40 nm for TiO2 nanoparticle doped WO3 thin film. TiO2 nanoparticle doped WO3 thin film shows ~95% reversibility due to may be attributed to nanocrystalline nature of the film, which helpful for charge insertion and deinsertion process. The diffusion coefficient for TiO2 nanoparticle doped WO3 film is less than undoped WO3.
Highlights
The electrochromism is key to green technology as it controls the energy of solar flux entering in building, utilizes solar energy, and increases comfort in buildings
TiO2 nanoparticle doping ruptures WO3 fibrous reticulate network and TiO2 nanoparticles were segregated in the surface of the film to form large clusters with particle size ∼40 nm
The fibrous reticulated morphology is converted into granular structure at TiO2 nanoparticle doping
Summary
The electrochromism is key to green technology as it controls the energy of solar flux entering in building, utilizes solar energy, and increases comfort in buildings. The researcher developed transition metal oxide nanowires based ECDs that show a great improvement in coloration efficiency, contrast, and durability [5, 6]. These ECDs show promising switching rate, life stability, and contrast. Some literature is available on WO3 films doped with Co, Cr, and Ni for electrochromic properties for ECD [11, 12] He et al [13] showed that the addition of gold over layer on WO3 thin film formed by physical vapor deposition resulted in a better change of optical density in electrochromic process. The main goal is to increase coloration efficiency by TiO2 nanoparticle doping in WO3 matrix
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