Grain-boundary segregation of magnesium in doped cuprous oxide and impact on electrical transport properties

Autor: Wilfried Favre, Ngoc Duy Nguyen, Joao Resende, Stéphane Brochen, Claudia Fleischmann, Carmen Jiménez, Jean-Luc Deschanvres, V. H. Nguyen, Lorenzo Bottiglieri, Wilfried Vandervorst
Přispěvatelé: Laboratoire des matériaux et du génie physique (LMGP ), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN), Institut National de L'Energie Solaire (INES), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)
Rok vydání: 2021
Předmět:
Materials for devices
Electron mobility
Materials science
Science
Analytical chemistry
Oxide
chemistry.chemical_element
02 engineering and technology
Atom probe
Chemical vapor deposition
01 natural sciences
Article
Techniques and instrumentation
law.invention
chemistry.chemical_compound
law
ATOM-PROBE TOMOGRAPHY
0103 physical sciences
CU2O THIN-FILMS
RECONSTRUCTION
010302 applied physics
Science & Technology
Multidisciplinary
Dopant
Magnesium
[CHIM.MATE]Chemical Sciences/Material chemistry
021001 nanoscience & nanotechnology
Acceptor
Multidisciplinary Sciences
chemistry
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Science & Technology - Other Topics
Medicine
Grain boundary
ORIENTATION
0210 nano-technology
Materials for energy and catalysis
Zdroj: Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Scientific Reports
Scientific Reports, Nature Publishing Group, 2021, 11, pp.7788. ⟨10.1038/s41598-021-86969-7⟩
Scientific Reports, 2021, 11, pp.7788. ⟨10.1038/s41598-021-86969-7⟩
ISSN: 2045-2322
Popis: In this study, we report the segregation of magnesium in the grain boundaries of magnesium-doped cuprous oxide (Cu2O:Mg) thin films as revealed by atom probe tomography and the consequences of the dopant presence on the temperature-dependent Hall effect properties. The incorporation of magnesium as a divalent cation was achieved by aerosol-assisted metal organic chemical vapour deposition, followed by thermal treatments under oxidizing conditions. We observe that, in comparison with intrinsic cuprous oxide, the electronic transport is improved in Cu2O:Mg with a reduction of resistivity to 13.3 ± 0.1 Ω cm, despite the reduction of hole mobility in the doped films, due to higher grain-boundary scattering. The Hall carrier concentration dependence with temperature showed the presence of an acceptor level associated with an ionization energy of 125 ± 9 meV, similar to the energy value of a large size impurity−vacancy complex. Atom probe tomography shows a magnesium incorporation of 5%, which is substantially present at the grain boundaries of the Cu2O.
Databáze: OpenAIRE
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