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Issue 29, 2015
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Effects of morphology, size and crystallinity on the electrochromic properties of nanostructured WO3 films

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Abstract

WO3 nanostructures with various morphologies and crystallinity (such as cylinder-like WO3 nanorod arrays (WNRs-1), porous WO3 nanofibers, WO3 nanoflake arrays, sharp cone-like nanorod arrays (WNRs-2) and annealed cylinder-like WNRs-1) were prepared on FTO substrates by using a hydrothermal method without organic additives. The effects of morphology, size and crystallinity on the electrochromic properties of WO3 nanostructures were systematically investigated by scanning electron microscopy, X-ray diffraction, cyclic voltammetry and chronoamperometry. WNRs-1 exhibited excellent cyclic stability, wide optical modulation (64%), and relatively high coloration efficiency (61 cm2 Cāˆ’1). Fast switching speeds of 5 s and 6 s for bleaching and coloration are achieved for WNRs-1 after annealing. Moreover, the relationship between the micro-morphologies/structures and electrochromic performance of WO3 nanostructures was also discussed.

Graphical abstract: Effects of morphology, size and crystallinity on the electrochromic properties of nanostructured WO3 films

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Article information


Submitted
29 Apr 2015
Accepted
07 Jun 2015
First published
08 Jun 2015

CrystEngComm, 2015,17, 5440-5450
Article type
Paper
Author version available

Effects of morphology, size and crystallinity on the electrochromic properties of nanostructured WO3 films

F. Zheng, W. Man, M. Guo, M. Zhang and Q. Zhen, CrystEngComm, 2015, 17, 5440
DOI: 10.1039/C5CE00832H

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