Synthesis and Characterization of Magnesium-Alloyed Hematite Thin Films

Houwen Tang, M. A. Matin, Heli Wang, Mowafak Al-Jassim, John Turner, Yanfa Yan

Research output: Contribution to journalArticlepeer-review

6 Scopus Citations

Abstract

We have synthesized pure and Mg-alloyed hematite thin films on F-doped, SnO 2-coated glass substrates by radiofrequency magnetron cosputtering of iron oxide with and without MgO sources in mixed Ar/O 2 and mixed N2/O 2 ambient. We found that hematite films deposited in N2/O 2 ambient exhibited much poorer crystallinity than those deposited in Ar/O 2 ambient. We determined that Mg alloying led to increased crystallinity and bandgap. Furthermore, we found that Mg alloying inverted the type of conductivity of the thin films: pure hematite thin films exhibited n-type conductivity, whereas Mg-alloyed hematite thin films exhibited p-type conductivity.

Original languageAmerican English
Pages (from-to)3100-3106
Number of pages7
JournalJournal of Electronic Materials
Volume41
Issue number11
DOIs
StatePublished - 2012

NREL Publication Number

  • NREL/JA-5200-53706

Keywords

  • Co-alloy
  • Hematite
  • Sputtering
  • Water splitting

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