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Article Dans Une Revue Journal of Electronic Materials Année : 2022

Cu-doped and un-doped WO3 photochromic thin films

Résumé

In this work, 0%, 0.5%, 1%, and 2% Cu-doped WO3 nanoparticles were synthesized via a polyol method. The as-synthesized materials were characterized by x-ray diffraction, scanning electron microscopy (SEM), electron paramagnetic resonance (EPR), x-ray photoelectron spectroscopy (XPS), and UV-Vis photochromic activity. A bond valence model was adopted to explain the relationship between the lattice parameter and Cu percentage. Additionally, two films (1% Cu-doped and un-doped samples) obtained by dip-coating from a well-dispersed suspension were optically investigated using ex situ and in situ UV-Vis spectrometry; coloring/bleaching kinetics were thoroughly studied. The Cu-doped WO3 film was found to have a high-quality bleaching mechanism (five times as fas as the un-doped WO3 film). Finally, the high bleaching performance of the doped films was confirmed by successive cycling, showing that the as-prepared compounds are of great interest for smart window applications, for example.

Domaines

Matériaux
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Dates et versions

hal-03577741 , version 1 (16-02-2022)

Identifiants

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Yazan Badour, Sylvain Danto, Christine Labrugère, Mathieu Duttine, Manuel Gaudon. Cu-doped and un-doped WO3 photochromic thin films. Journal of Electronic Materials, 2022, 51 (4), pp.1555-1567. ⟨10.1007/s11664-021-09389-3⟩. ⟨hal-03577741⟩
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