Vol. 5 (12) pp. 1695-1706 DOI: 10.21474/IJAR01/6137

INFLUENCE OF GROWTH CONDITIONS ON THE ELECTROCHROMIC EFFICIENCY AND THE ENERGY BAND GAP OF IRIDIUM OXIDE THIN FILMS.

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  • Physics Department, Faculty of Science, El-Minia University, El-Minia City, Egypt.
  • Physics Department, Faculty of Science, Helwan University, Ain-Helwan-Egypt.
  • Physics department, Faculty of Science, Ed Dawadmi, Shaqra University, Saudi Arabia.
  • Educational Services, Qassim University, Ministry of High Education, Saudi Arabia.
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Abstract

In the present research, work has been focused on the efficiency of electrochromic properties and energy gap of Ir-oxide thin films as a function of preparative parameters. IrO2 thin films were deposited onto preheated indium tin oxide (ITO) coated glass substrates by cost effective chemical spray pyrolysis technique (SPT) at different substrate temperature (Tsub) and solution molarity (SM). Electrochromic characteristic of IrO2 thin films was studied in aqueous electrolyte of 0.1M H2SO4. The optimum potential difference of coloration and bleaching state at +1.2 and -1.2V, respectively. The results show that, the best value of electrochromic efficiency (CE) and the optical density difference (DOD)λ=630nm were obtained at the conditions of preparation of 400oC and solution molarity of 0.01M. IrO2 thin films were found to have a direct transition allowed. The value of energy gap ( ) for as-deposited, coloured and bleached states as a function of preparative parameters have been calculated. The obtained value of energy gape, as a function of film thickness was found to be remain constant of as-deposited, colored and bleached states while the changed with substrate temperature, Tsub. In addition, the fraction of crystalline volume of IrO2 was estimated of the investigated samples.

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How to Cite This Article

Alaa A. Akl, Salah M.M. Salman and Eman Kashita. (2017); INFLUENCE OF GROWTH CONDITIONS ON THE ELECTROCHROMIC EFFICIENCY AND THE ENERGY BAND GAP OF IRIDIUM OXIDE THIN FILMS., International Journal of Advanced Research (IJAR), 5 (12), 1695-1706, ISSN 2320-5407. DOI: https://doi.org/10.21474/IJAR01/6137

Corresponding Author

Alaa Ahmed Akl
Prof.Dr. in the Material Science, Faculty of Science, Physics department, El-Minia University, El-Minia, EGYPT

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