Enhanced electrochromic coloration in Ag nanoparticle decorated WO3 thin films

TitleEnhanced electrochromic coloration in Ag nanoparticle decorated WO3 thin films
Publication TypeJournal Article
Year of Publication2013
AuthorsKharade, RR, Mali, SS, Patil, SP, Patil, KR, Gang, MG, Patil, PS, Kim, JH, Bhosale, PN
JournalElectrochimica Acta
Volume102
Pagination358-368
Date PublishedJUL
ISSN0013-4686
KeywordsAg2WO4, CIE coordinates, Electrochromism, SPR, WO3/Ag composite thin films
Abstract

WO3/Ag composite thin films were prepared by microwave assisted sol-gel synthesis (MW-SGS) of WO3 followed by vacuum evaporation of Ag nanoparticles and their enhanced electrochromic coloration was investigated. The composition and morphology of WO3 thin films with different thickness of Ag layer obtained by vacuum evaporation were investigated. Distinct plasmon absorption bands of Ag nanoparticle thin films were obtained. The optical band gap energy of WO3/Ag films decreased with increasing the Ag layer thickness. The surface of these films has been examined using X-ray photoelectron spectroscopy (XPS) to gain information about the chemical states of species present at surfaces. Experimental results indicated that the conductivity of the films increased after surface modification by Ag layer. To investigate the origin of enhanced electrochromic absorption in optical properties, working electrode consisting of WO3/Ag thin film was used and observed the optical properties during electrochemical reaction. It was found that composite electrode shows enhancement in electrochromic properties in terms of optical modulation (Delta OD) and coloration efficiency (eta). (C) 2013 Elsevier Ltd. All rights reserved.

DOI10.1016/j.electacta.2013.03.123
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

4.086

Divison category: 
Center for Material Characterization (CMC)