THE PROPERTIES OF SONICATED IMMERSION GROWN HEMATITE FILMS AT VARIOUS ANNEALING TEMPERATURES

Authors

  • Wan Rosmaria Wan Ahmad NANO-ElecTronic Centre (NET), School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
  • Mohamad Hafiz Mamat ᵃNANO-ElecTronic Centre (NET), School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia ᵇNANO-SciTech Centre (NST), Institute of Science (IOS), Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
  • Ahmad Sabirin Zoolfakar NANO-ElecTronic Centre (NET), School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
  • Zuraida Khusaimi NANO-SciTech Centre (NST), Institute of Science (IOS), Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
  • Nur Izzah Khirul Ashar NANO-ElecTronic Centre (NET), School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
  • N. Parimon Faculty of Engineering, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia
  • N. Vasimalai School of Physical and Chemical Sciences, B.S. Abdur Rahman Crescent Institute of Science & Technology, Vandalur, Chennai 600 048, India
  • I. B. Shameem Banu School of Physical and Chemical Sciences, B.S. Abdur Rahman Crescent Institute of Science & Technology, Vandalur, Chennai 600 048, India
  • Mohamad Rusop Mahmood NANO-SciTech Centre (NST), Institute of Science (IOS), Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

DOI:

https://doi.org/10.11113/jurnalteknologi.v84.19353

Keywords:

Hematite films, sonicated immersion, thermal annealing, annealing temperature, humidity sensing

Abstract

In this research, hematite (α-Fe2O3) film was synthesised to study the effect of annealing temperature on its crystallinity, optical and electrical properties. Through a sonicated solution immersion technique, hematite films were deposited on a fluorine-doped tin oxide (FTO) glass substrate. In the synthesis process, 0.2 M ferric chloride (FeCl3·6H2O) was used as a precursor, 0.2 M urea (NH2CONH2) as the stabilizer, and de-ionized (DI) water as a solvent to produce 200 ml of aqueous solution. During the annealing treatment, we varied the temperatures at 350 ºC, 450 ºC and 500 ºC. The X-ray diffraction (XRD) pattern revealed the presence of peaks of 2θ angles between 20° to 90°, corresponding to (104), (110), (214), (125) and (128) planes, which exhibited crystalline structures of rhombohedral with diffraction peaks of hematite phase (α-Fe2O3). Optical characterisations showed that the transmittances of all samples were close to 100% in the high wavelength level of the visible light region, which is close to the infrared spectrum. Absorption of hematite samples was found to be more than 0.6 a.u. in the low wavelength level of the visible light region close to the ultraviolet spectrum and close to 0 in the high wavelength level of the visible light region close to the infrared spectrum. A sample with an annealing temperature of 500 °C has the lowest transmission and the highest absorbance in the visible region due to dim pigments in the hematite film. 

Downloads

Published

2022-10-31

How to Cite

Wan Ahmad, W. R. ., Mamat, M. H. ., Zoolfakar, A. S. ., Khusaimi, Z. ., Khirul Ashar, N. I. ., Parimon, N. ., Vasimalai, N. ., Banu, I. B. S. ., & Mahmood, M. R. . (2022). THE PROPERTIES OF SONICATED IMMERSION GROWN HEMATITE FILMS AT VARIOUS ANNEALING TEMPERATURES. Jurnal Teknologi, 84(6-2), 85-93. https://doi.org/10.11113/jurnalteknologi.v84.19353