Vacancy formation in MoO3: hybrid density functional theory and photoemission experiments

Salawu Omotayo Akande, Alexander Chroneos, Maria Vasilopoulou, Stella Kennou, Uda Schwingenschlögl

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    23 Citations (Scopus)
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    Abstract

    Molybdenum oxide (MoO3) is an important material that is being considered for numerous technological applications, including catalysis and electrochromism. In the present study, we apply hybrid density functional theory to investigate O and Mo vacancies in the orthorhombic phase. We determine the vacancy formation energies of different defect sites as functions of the electron chemical potential, addressing different charge states. In addition, we investigate the consequences of defects for the material properties. Ultraviolet photoemission spectroscopy is employed to study the valence band of stoichiometric and O defective MoO3. We show that O vacancies result in occupied in-gap states.
    Original languageEnglish
    Pages (from-to)9526-9531
    Number of pages6
    JournalJournal of Materials Chemistry C Materials for optical, magnetic and electronic devices
    Volume4
    Issue number40
    DOIs
    Publication statusPublished - 29 Sept 2016

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