دورية أكاديمية
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Fermi level pinning in metal oxides: influence on photocatalysis and photoelectrochemistry.

التفاصيل البيبلوغرافية
العنوان: Fermi level pinning in metal oxides: influence on photocatalysis and photoelectrochemistry.
المؤلفون: Mamedov D; IC2MP, UMR-CNRS 7285, University of Poitiers, 4 rue Michel Brunet, 86072 Poitiers, France., Karazhanov SZ; Department for Solar Energy, Institute for Energy Technology, Instituttveien 18, 2027 Kjeller, Norway., Alonso-Vante N; IC2MP, UMR-CNRS 7285, University of Poitiers, 4 rue Michel Brunet, 86072 Poitiers, France.
المصدر: Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2024 Jul 16; Vol. 36 (41). Date of Electronic Publication: 2024 Jul 16.
نوع المنشور: Journal Article; Review
اللغة: English
بيانات الدورية: Publisher: IOP Pub Country of Publication: England NLM ID: 101165248 Publication Model: Electronic Cited Medium: Internet ISSN: 1361-648X (Electronic) Linking ISSN: 09538984 NLM ISO Abbreviation: J Phys Condens Matter Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Original Publication: Bristol, UK : IOP Pub., c1989-
مستخلص: Photocatalysis and photoelectrochemical (PEC) reactions are complex processes involving both the physical properties and surface chemistry of the semiconductor photocatalyst. Their interplay applies specific limitations on the performance of different materials in light-driven reactions, often despite their optimal band structure and optical absorption. One of the ways to properly characterize the photocatalytic and PEC properties of semiconductors remains the measurement of the photopotential, which characterizes a driving force of photoinduced processes in the material. In this work, we give a general scope on the photopotential in PEC reactions that finds its origin in semiconductor physics. It is shown that the photopotential does not always play an interchangeable role with the photocurrent in comparative analysis of the photocatalytic performance of different materials. Furthermore, a correlation between the photopotential and the kinetics of methylene blue dye photocatalysis is shown for anatase-TiO 2 , CeO 2 and WO 3 as photocatalysts. Fermi level pinning (FLP) in the bandgap of CeO 2 is observed limiting the photoactivity of the compound, which is attributed to the high defectivity of CeO 2 . A short review is given on the possible origins of FLP in metal oxides and ways to overcome it. It is pointed out that the shift of the Fermi level after illumination of CeO 2 can trigger the chemical instability of the material accompanied by the FLP process.
(© 2024 IOP Publishing Ltd.)
فهرسة مساهمة: Keywords: defect engineering; fermi level pinning; metal oxides; photopotential
تواريخ الأحداث: Date Created: 20240628 Latest Revision: 20240716
رمز التحديث: 20240716
DOI: 10.1088/1361-648X/ad5d3b
PMID: 38942001
قاعدة البيانات: MEDLINE
الوصف
تدمد:1361-648X
DOI:10.1088/1361-648X/ad5d3b