Electrochromic properties of heat-treated thin films of CeO2–TiO2–ZrO2 prepared by sol–gel route |
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Authors: | FE Ghodsi FZ Tepehan GG Tepehan |
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Affiliation: | aDepartment of Physics, Faculty of Sciences and Letters, Technical University of Istanbul, Maslak, Istanbul 34469, Turkey;bDepartment of Physics, Faculty of Sciences, The University of Guilan, Namjoo Avenue, P.O. Box 41335-1914, Rasht, Iran;cFaculty of Arts and Science, Kadir Has University, Cibali, Istanbul 34083, Turkey |
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Abstract: | CeO2–TiO2–ZrO2 thin films were prepared using the sol–gel process and deposited on glass and ITO-coated glass substrates via dip-coating technique. The samples were heat treated between 100 and 500 °C. The heat treatment effects on the electrochromic performances of the films were determined by means of cyclic voltammetry measurements. The structural behavior of the film was characterized by atomic force microscopy and X-ray diffraction. Refractive index, extinction coefficient, and thickness of the films were determined in the 350–1000 nm wavelength, using nkd spectrophotometry analysis.Heat treatment temperature affects the electrochromic, optical, and structural properties of the film. The charge density of the samples increased from 8.8 to 14.8 mC/cm2, with increasing heat-treatment temperatures from 100 to 500 °C. It was determined that the highest ratio between anodic and cathodic charge takes place with increase of temperature up to 500 °C. |
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Keywords: | Electrochromism Heat treatment Sol– gel CeO2– TiO2– ZrO2 thin films |
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