TY - JOUR
T1 - Effect of post annealing on DC magnetron sputtered tungsten oxide (WO3) thin films for smartwindow applications
AU - Reddy G V, Ashok
AU - Naveen Kumar, K.
AU - Sattar, Sheik Abdul
AU - Shetty, Hitha D.
AU - Guru Prakash, Nunna
AU - Imran Jafri, R.
AU - Devaraja, C.
AU - B C, Manjunatha
AU - C S, Kaliprasad
AU - Premkumar, R.
AU - Ansar, Sabah
N1 - Funding Information:
The author acknowledges Nitte Meenakshi Institute of Technology , Bengaluru, India for financial support, and the authors thank the Researchers Supporting Project number ( RSP2023R169 ), King Saud University , Riyadh, Saudi Arabia for the financial support.
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/9/1
Y1 - 2023/9/1
N2 - Tungsten oxide (WO3) thin films were deposited on Fluorine Doped Tin Oxide (FTO) and Corning Glass (CG) glass substrate by DC magnetron sputtering. The annealing temperature was varied to study its effect on surface morphology, structural, electrochromic (EC), and optical properties and these are investigated by Scanning Electron Microscope (SEM), X-ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, Cyclic voltammetry, and ultraviolet (UV) spectroscopy. From SEM analysis WO3 thin films annealed at 27 °C, 100 °C, 200 °C, and 300 °C were shown to crack free after that cracked film was observed for 400 °C. From the XRD investigation that the WO3 thin films annealed at 27 °C, 100 °C, 200 °C, and 300 °C were amorphous and crystallized at 400 °C. The optical band gap (Eg) of WO3 films was decreased from 2.98 eV to 2.30 eV with an increase in annealed temperature. The coloration efficiency (CE) was observed at 51.26 cm2/C at 300 °C and 35.06 cm2/C at 400 °C and the lowest diffusion coefficient was observed at 5.86 × 10−10 cm2/s at 400 °C. On coloring efficiency, which can be very important in electrochromic (EC) applications, post-annealing has been seen to have a strong influence.
AB - Tungsten oxide (WO3) thin films were deposited on Fluorine Doped Tin Oxide (FTO) and Corning Glass (CG) glass substrate by DC magnetron sputtering. The annealing temperature was varied to study its effect on surface morphology, structural, electrochromic (EC), and optical properties and these are investigated by Scanning Electron Microscope (SEM), X-ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, Cyclic voltammetry, and ultraviolet (UV) spectroscopy. From SEM analysis WO3 thin films annealed at 27 °C, 100 °C, 200 °C, and 300 °C were shown to crack free after that cracked film was observed for 400 °C. From the XRD investigation that the WO3 thin films annealed at 27 °C, 100 °C, 200 °C, and 300 °C were amorphous and crystallized at 400 °C. The optical band gap (Eg) of WO3 films was decreased from 2.98 eV to 2.30 eV with an increase in annealed temperature. The coloration efficiency (CE) was observed at 51.26 cm2/C at 300 °C and 35.06 cm2/C at 400 °C and the lowest diffusion coefficient was observed at 5.86 × 10−10 cm2/s at 400 °C. On coloring efficiency, which can be very important in electrochromic (EC) applications, post-annealing has been seen to have a strong influence.
UR - https://www.scopus.com/pages/publications/85160621177
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U2 - 10.1016/j.physb.2023.414996
DO - 10.1016/j.physb.2023.414996
M3 - Article
AN - SCOPUS:85160621177
SN - 0921-4526
VL - 664
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
M1 - 414996
ER -