Enhanced Colouration Efficiency of Pulsed DC Magnetron Sputtered WO3 Films Cycled in H2SO4 Electrolyte Solution | Zendy

K. Punitha | Zendy; R. Sivakumar | Zendy; C. Sanjeeviraja | Zendy

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Enhanced Colouration Efficiency of Pulsed DC Magnetron Sputtered WO₃ Films Cycled in H₂SO₄ Electrolyte Solution

Author(s) -

K. Punitha,

R. Sivakumar,

C. Sanjeeviraja

Publication year - 2014

Publication title -

smart materials research

Language(s) - English

Resource type - Journals

eISSN - 2090-3561

pISSN - 2090-357X

DOI - 10.1155/2014/151732

Subject(s) - electrochromism , electrolyte , materials science , analytical chemistry (journal) , ion , cavity magnetron , intercalation (chemistry) , sputter deposition , electrochemistry , pulsed dc , thin film , optoelectronics , sputtering , inorganic chemistry , electrode , chemistry , nanotechnology , organic chemistry , chromatography

In the present investigation, we report on DC power and pulsing frequency induced changes in electrochromic properties of pulsed DC magnetron sputtered WO3 films by intercalating/deintercalating H+ ions from 0.1 M H2SO4 electrolyte solution. The observed efficient colouration ↔ bleaching mechanism of WO3 films confirms the effective electrochromic nature of the films associated with the electrochemical intercalation/deintercalation of H+ ions and electrons into WO3 lattice. The higher optical modulation was observed in the visible region of the optical transmittance spectra of colored and bleached WO3 films. The maximum coloration efficiency of 79 cm2/C was observed the first time for the film deposited at a DC power of 150 W and a pulsing frequency of 25 kHz

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