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Enhanced transmittance modulation of ITO/NiO x /ZrO2:H/WO3/ITO electrochromic devices

Enhanced transmittance modulation of ITO/NiO x /ZrO2:H/WO3/ITO electrochromic devices ZrO2:H thin films were deposited by DC magnetron sputtering at room temperature. The effects of thickness on structure and morphologies of ZrO2:H thin films were lucubrated. The X-ray photoelectron spectroscopy analysis reveals that the fully oxidized value of Zr (Zr4+) exists in both ZrO2 and ZrO2:H films. X-ray diffraction data show the crystallinity of ZrO2:H thin films tends to be weak and the microstructure changes slightly. Atomic force microscopy analysis presents that both the grain size and surface roughness increase as the thickness increases. Correspondingly, all-thin-film ITO/NiO x /ZrO2:H/WO3/ITO electrochromic devices (ECDs) were monolithically fabricated, among which the thickness of ZrO2:H film was adjusted. The ECD assembled with 50 nm ZrO2:H film has the best electrochromic property with transmittance modulation (ΔT) of 65.2 % at 550 nm. The effects of operation potential on ECDs were also elaborated studied. ECDs can get colored in saturated states at relatively high potential as no more unoccupied sites exist in WO3 to accommodate the continuously injected H+ ions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Enhanced transmittance modulation of ITO/NiO x /ZrO2:H/WO3/ITO electrochromic devices

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References (37)

Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer-Verlag Berlin Heidelberg
Subject
Chemistry; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-015-1591-z
Publisher site
See Article on Publisher Site

Abstract

ZrO2:H thin films were deposited by DC magnetron sputtering at room temperature. The effects of thickness on structure and morphologies of ZrO2:H thin films were lucubrated. The X-ray photoelectron spectroscopy analysis reveals that the fully oxidized value of Zr (Zr4+) exists in both ZrO2 and ZrO2:H films. X-ray diffraction data show the crystallinity of ZrO2:H thin films tends to be weak and the microstructure changes slightly. Atomic force microscopy analysis presents that both the grain size and surface roughness increase as the thickness increases. Correspondingly, all-thin-film ITO/NiO x /ZrO2:H/WO3/ITO electrochromic devices (ECDs) were monolithically fabricated, among which the thickness of ZrO2:H film was adjusted. The ECD assembled with 50 nm ZrO2:H film has the best electrochromic property with transmittance modulation (ΔT) of 65.2 % at 550 nm. The effects of operation potential on ECDs were also elaborated studied. ECDs can get colored in saturated states at relatively high potential as no more unoccupied sites exist in WO3 to accommodate the continuously injected H+ ions.

Journal

IonicsSpringer Journals

Published: Nov 18, 2015

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