Enhancement in the solar light harvesting ability of tungsten oxide thin films by annealing in vacuum and hydrogen

Tanvir Hussain, M. F. Al-Kuhaili, S. M.A. Durrani, Ahsanulhaq Qurashi, H. A. Qayyum

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Thin films of tungsten oxide were fabricated by RF-sputtering. The films were annealed in vacuum and hydrogen at different temperatures to enhance the solar light absorption in the visible and near infrared regions by creating oxygen vacancies and localized surface plasmon resonance. The effect of vacuum and hydrogen annealing on structural, morphology, chemical, electrical and optical properties were investigated. Vacuum-annealed and hydrogen-annealed films behaved like degenerate semiconductor and showed strong absorption in the near-infrared region due to localized surface plasmon resonance. The solar light harvesting properties of as-deposited, vacuum-annealed and hydrogen-annealed tungsten oxide films were examined by measuring their photocurrent response.

Original languageBritish English
Pages (from-to)28755-28765
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number48
DOIs
StatePublished - 30 Nov 2017

Keywords

  • Band gap
  • Hall effect
  • LSPR
  • Oxygen vacancies
  • Photocurrent
  • Solar light

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