Influence of disordered morphology on electrochromic stability of WO3/PPy

Tungsten oxide (WO3) films are critical for smart windows because of their capacity of varying the throughput of visible light and solar energy. This study highlights the evolution of structural and morphological changes of electrodeposited WO3 thin films coated with polypyrrole (PPy) by using chemical bath deposition. The structural and surface properties of WO3 thin films were studied using Xray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy. The electrochemical stability was inspected using repetitive cyclic voltammetry (CV) cycles for each sample in LiClO4-PC electrolyte for prolonged periods. The results showed an improvement in the electrochemical stability after the CV study. (C) 2016 Elsevier B.V. All rights reserved.