Microstructural, optical and electrochromical properties of W-doped Nb2O5 thin films prepared by dip-coating process using sols obtained by the chloroalkoxide route

Undoped and W-doped Nb 2 O 5 thin films have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) in order to study the influence of W doping on their structural and morphological properties. The synthesized Nb 2 O 5 thin films have been...

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Published in:Journal of materials science. Materials in electronics 2019-10, Vol.30 (19), p.17999-18014
Main Authors: Kumar, Anil, Sahay, P. P.
Format: Article
Language:English
Subjects:
Atomic force microscopy
Characterization and Evaluation of Materials
Chemistry and Materials Science
Circuits
Crystal structure
Crystallites
Crystals
Dip coatings
Doped films
Doping
Electrochemical impedance spectroscopy
Immersion coating
Materials Science
Microscopy
Niobium oxides
Optical and Electronic Materials
Optical properties
Spectrum analysis
Thin films
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Sahay, P. P.
description Undoped and W-doped Nb 2 O 5 thin films have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) in order to study the influence of W doping on their structural and morphological properties. The synthesized Nb 2 O 5 thin films have been found to possess an orthorhombic crystal structure having crystallite sizes 10–31 nm. The UV–visible spectroscopy shows the optical bandgap ~ 3.60 eV. The cyclic voltammetric studies show that the colouration efficiency of the films improves upon W doping with the optimum value of 68.7 cm 2 /C at 600 nm for the 3 at.% W-doped film. The chronoamperometric studies reveal that the switching response of the films becomes better upon W doping. The electrochemical impedance spectroscopy (EIS) data has been analyzed by fitting it to the equivalent electrical circuit (EEC) using Nova software.
doi_str_mv 10.1007/s10854-019-02153-8
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subjects Atomic force microscopy
Characterization and Evaluation of Materials
Chemistry and Materials Science
Circuits
Crystal structure
Crystallites
Crystals
Dip coatings
Doped films
Doping
Electrochemical impedance spectroscopy
Immersion coating
Materials Science
Microscopy
Niobium oxides
Optical and Electronic Materials
Optical properties
Spectrum analysis
Thin films
title Microstructural, optical and electrochromical properties of W-doped Nb2O5 thin films prepared by dip-coating process using sols obtained by the chloroalkoxide route
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