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Photoresponse enhancing in nanostructured WO3films by slight change in heating ambient

Naseri, N ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jallcom.2016.09.275
  3. Publisher: Elsevier Ltd , 2017
  4. Abstract:
  5. Providing solar hydrogen as a clean energy resource is one of the human challenges for future. Controlling oxygen vacancies as well as surface morphology in metal oxide semiconductors enables developing PEC H2production in some understood ways. Here, the influence of simple change in annealing atmosphere, air and pure oxygen, on photoresponse of nanocrystalline WO3has been studied completely. Results revealed that such slight change in annealing procedure increases effective surface interface and donor density by 77 and 72%, respectively. These effects and also retarding recombination of photogenerated electro-hole pair resulted in photocurrent enhancement under solar like illumination more than three times. © 2016 Elsevier B.V
  6. Keywords:
  7. Annealing ; WO3photoanode ; Energy resources ; Metals ; MOS devices ; Nanocrystals ; Oxide semiconductors ; Oxygen vacancies ; Surface roughness ; Annealing atmospheres ; Annealing procedures ; Donor density ; Metal oxide semiconductor ; Nanocrystallines ; Photo-anodes ; Photocurrent enhancement ; Surface interfaces ; Solar power generation
  8. Source: Journal of Alloys and Compounds ; Volume 693 , 2017 , Pages 871-875 ; 09258388 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925838816330389