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Barbier T, Lebedev OI, Maignan A. Metal Substitutions ( M = Al, Ga, In; Sn, Ge; and Mn, Fe, Co) in ZnS: Sphalerite versus Wurtzite Formation. Inorg Chem 2024; 63:7189-7198. [PMID: 38600647 DOI: 10.1021/acs.inorgchem.3c04374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
A series of Zn1-xMxS polycrystalline samples were synthesized via a solid-state reaction in closed vessels to examine the solubility of foreign M cations within the wurtzite ZnS structure, employing quenching or slow cooling processes to favor specific polymorphs. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses revealed diverse structural behaviors across different cations. Group 13 elements (Al and Ga) formed solid solutions with a wurtzite structure, while In showed complex layer stacking defects. For 3d magnetic cations (Mn, Fe, and Co), a broad solubility range in the hexagonal structure was noted for Mn, whereas Fe and Co more readily formed cubic structures, with solubilities similar to Mn in the sphalerite form. Despite structural differences, magnetic susceptibilities and spin freezing temperatures for Fe and Co were comparable. Group 14 elements showed varied behaviors: Sn was insoluble in ZnS, as attested by unchanged unit cell parameters and surface crystallite Sn, whereas Ge only formed in the cubic phase with a solubility limit of x ≈ 0.2. The study discusses these variations in solubility and structure in terms of oxidation states, ionic-covalent radius, and coordination preferences in sulfides.
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Affiliation(s)
- Tristan Barbier
- Laboratoire CRISMAT, UMR 6508 , Normandie Université, CNRS, ENSICAEN, UNICAEN, 6 bd du Maréchal Juin, 14050 Caen Cedex 4, France
| | - Oleg I Lebedev
- Laboratoire CRISMAT, UMR 6508 , Normandie Université, CNRS, ENSICAEN, UNICAEN, 6 bd du Maréchal Juin, 14050 Caen Cedex 4, France
| | - Antoine Maignan
- Laboratoire CRISMAT, UMR 6508 , Normandie Université, CNRS, ENSICAEN, UNICAEN, 6 bd du Maréchal Juin, 14050 Caen Cedex 4, France
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2
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Kjeldby SB, Nguyen PD, García-Fernández J, Haug K, Galeckas A, Jensen IJT, Thøgersen A, Vines L, Prytz Ø. Optical properties of ZnFe 2O 4 nanoparticles and Fe-decorated inversion domain boundaries in ZnO. NANOSCALE ADVANCES 2023; 5:2102-2110. [PMID: 36998644 PMCID: PMC10044669 DOI: 10.1039/d2na00849a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 02/24/2023] [Indexed: 06/19/2023]
Abstract
The maximum efficiency of solar cells utilizing a single layer for photovoltaic conversion is given by the single junction Shockley-Queisser limit. In tandem solar cells, a stack of materials with different band gaps contribute to the conversion, enabling tandem cells to exceed the single junction Shockley-Queisser limit. An intriguing variant of this approach is to embed semiconducting nanoparticles in a transparent conducting oxide (TCO) solar cell front contact. This alternative route would enhance the functionality of the TCO layer, allowing it to participate directly in photovoltaic conversion via photon absorption and charge carrier generation in the nanoparticles. Here, we demonstrate the functionalization of ZnO through incorporation of either ZnFe2O4 spinel nanoparticles (NPs) or inversion domain boundaries (IDBs) decorated by Fe. Diffuse reflectance spectroscopy and electron energy loss spectroscopy show that samples containing spinel particles and samples containing IDBs decorated by Fe both display enhanced absorption in the visible range at around 2.0 and 2.6 eV. This striking functional similarity was attributed to the local structural similarity around Fe-ions in spinel ZnFe2O4 and at Fe-decorated basal IDBs. Hence, functional properties of the ZnFe2O4 arise already for the two-dimensional basal IDBs, from which these planar defects behave like two-dimensional spinel-like inclusions in ZnO. Cathodoluminescence spectra reveal an increased luminescence around the band edge of spinel ZnFe2O4 when measuring on the spinel ZnFe2O4 NPs embedded in ZnO, whereas spectra from Fe-decorated IDBs could be deconvoluted into luminescence contributions from bulk ZnO and bulk ZnFe2O4.
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Affiliation(s)
- S B Kjeldby
- Centre for Materials Science and Nanotechnology, University of Oslo N-0318 Oslo Norway
| | - P D Nguyen
- Centre for Materials Science and Nanotechnology, University of Oslo N-0318 Oslo Norway
| | - J García-Fernández
- Centre for Materials Science and Nanotechnology, University of Oslo N-0318 Oslo Norway
| | - K Haug
- Centre for Materials Science and Nanotechnology, University of Oslo N-0318 Oslo Norway
| | - A Galeckas
- Centre for Materials Science and Nanotechnology, University of Oslo N-0318 Oslo Norway
| | - I J T Jensen
- Centre for Materials Science and Nanotechnology, University of Oslo N-0318 Oslo Norway
- SINTEF Industry, Sustainable Energy Technology N-0314 Oslo Norway
| | - A Thøgersen
- SINTEF Industry, Sustainable Energy Technology N-0314 Oslo Norway
| | - L Vines
- Centre for Materials Science and Nanotechnology, University of Oslo N-0318 Oslo Norway
| | - Ø Prytz
- Centre for Materials Science and Nanotechnology, University of Oslo N-0318 Oslo Norway
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3
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Shtrikman H, Song MS, Załuska-Kotur MA, Buczko R, Wang X, Kalisky B, Kacman P, Houben L, Beidenkopf H. Intrinsic Magnetic (EuIn)As Nanowire Shells with a Unique Crystal Structure. NANO LETTERS 2022; 22:8925-8931. [PMID: 36343206 PMCID: PMC9706668 DOI: 10.1021/acs.nanolett.2c03012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 10/27/2022] [Indexed: 06/16/2023]
Abstract
In the pursuit of magneto-electronic systems nonstoichiometric magnetic elements commonly introduce disorder and enhance magnetic scattering. We demonstrate the growth of (EuIn)As shells, with a unique crystal structure comprised of a dense net of Eu inversion planes, over InAs and InAs1-xSbx core nanowires. This is imaged with atomic and elemental resolution which reveal a prismatic configuration of the Eu planes. The results are supported by molecular dynamics simulations. Local magnetic and susceptibility mappings show magnetic response in all nanowires, while a subset bearing a DC signal points to ferromagnetic order. These provide a mechanism for enhancing Zeeman responses, operational at zero applied magnetic field. Such properties suggest that the obtained structures can serve as a preferred platform for time-reversal symmetry broken one-dimensional states including intrinsic topological superconductivity.
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Affiliation(s)
- Hadas Shtrikman
- Department
of Condensed Matter Physics, Weizmann Institute
of Science, Rehovot 7610001, Israel
| | - Man Suk Song
- Department
of Condensed Matter Physics, Weizmann Institute
of Science, Rehovot 7610001, Israel
| | | | - Ryszard Buczko
- Institute
of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, Warsaw PL-02-668, Poland
| | - Xi Wang
- Department
of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Beena Kalisky
- Department
of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Perla Kacman
- Institute
of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, Warsaw PL-02-668, Poland
| | - Lothar Houben
- Department
of Chemical Research Support, Weizmann Institute
of Science, Rehovot 761001, Israel
| | - Haim Beidenkopf
- Department
of Condensed Matter Physics, Weizmann Institute
of Science, Rehovot 7610001, Israel
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Daneu N, Dražič G, Mazaj M, Barou F, Padrón-Navarta JA. Formation of contact and multiple cyclic cassiterite twins in SnO 2-based ceramics co-doped with cobalt and niobium oxides. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2022; 78:695-709. [PMID: 35975835 PMCID: PMC9370213 DOI: 10.1107/s2052520622006758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Contact and multiple cyclic twins of cassiterite commonly form in SnO2-based ceramics when SnO2 is sintered with small additions of cobalt and niobium oxides (dual doping). In this work, it is shown that the formation of twins is a two-stage process that starts with epitaxial growth of SnO2 on CoNb2O6 and Co4Nb2O9 seeds (twin nucleation stage) and continues with the fast growth of (101) twin contacts (twin growth stage). Both secondary phases form below the temperature of enhanced densification and SnO2 grain growth; CoNb2O6 forms at ∼700°C and Co4Nb2O9 at ∼900°C. They are structurally related to the rutile-type cassiterite and can thus trigger oriented (epitaxial) growth (local recrystallization) of SnO2 domains in different orientations on a single seed particle. While oriented growth of cassiterite on columbite-type CoNb2O6 grains can only result in the formation of contact twins, the Co4Nb2O9 grains with a structure comparable with that of corundum represent suitable sites for the nucleation of contact and multiple cyclic twins with coplanar or alternating morphology. The twin nucleation stage is followed by fast densification accompanied by significant SnO2 grain growth above 1300°C. The twin nuclei coarsen to large twinned grains as a result of the preferential and fast growth of the low-energy (101) twin contacts. The solid-state diffusion processes during densification and SnO2 grain growth are controlled by the formation of point defects and result in the dissolution of the twin nuclei and the incorporation of Nb5+ and Co2+ ions into the SnO2 matrix in the form of a solid solution. In this process, the twin nuclei are erased and their role in the formation of twins is shown only by irregular segregation of Co and Nb to the twin boundaries and inside the cassiterite grains, and Co,Nb-enrichment in the cyclic twin cores.
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Affiliation(s)
- Nina Daneu
- Advanced Materials Department, Jožef Stefan Institute, Jamova cesta 39, Ljubljana, 1290, Slovenia
| | - Goran Dražič
- Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia
| | - Matjaž Mazaj
- Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia
| | - Fabrice Barou
- Géosciences Montpellier, Université de Montpellier and CNRS, UMR5243, Montpellier, France
| | - José Alberto Padrón-Navarta
- Géosciences Montpellier, Université de Montpellier and CNRS, UMR5243, Montpellier, France
- Andalusian Institute of Earth Sciences, Spanish Research Council and University of Granada, Granada, Spain
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Evaluation of the Nanodomain Structure in In-Zn-O Transparent Conductors. NANOMATERIALS 2021; 11:nano11010198. [PMID: 33466848 PMCID: PMC7830485 DOI: 10.3390/nano11010198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/07/2021] [Accepted: 01/09/2021] [Indexed: 11/17/2022]
Abstract
The optimization of novel transparent conductive oxides (TCOs) implies a better understanding of the role that the dopant plays on the optoelectronic properties of these materials. In this work, we perform a systematic study of the homologous series ZnkIn2Ok+3 (IZO) by characterizing the specific location of indium in the structure that leads to a nanodomain framework to release structural strain. Through a systematic study of different terms of the series, we have been able to observe the influence of the k value in the nano-structural features of this homologous series. The stabilization and visualization of the structural modulation as a function of k is discussed, even in the lowest term of the series (k = 3). The strain fields and atomic displacements in the wurtzite structure as a consequence of the introduction of In3+ are evaluated.
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Labégorre JB, Lebedev OI, Bourgès C, Rečnik A, Košir M, Bernik S, Maignan A, Le Mercier T, Pautrot-d'Alençon L, Guilmeau E. Phonon Scattering and Electron Doping by 2D Structural Defects in In/ZnO. ACS APPLIED MATERIALS & INTERFACES 2018; 10:6415-6423. [PMID: 29359559 DOI: 10.1021/acsami.7b19489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In/ZnO bulk compounds have been synthesized using a simple solid-state process. In this study, both the structural features and thermoelectric properties of the Zn1-xInxO series with ultralow indium content (0 ≤ x ≤ 0.02) have been studied. High-angle annular dark-field scanning transmission electron microscopy analyses highlight that indium has the ability to create multiple basal plane and pyramidal defects that produce ZnO domains with inverted polarity starting from dopant concentrations as low as 0.25 atom %. Interestingly, the formation of parallel inversion boundaries consisting of InO6 octahedra in the ZnO4 tetrahedra matrix is responsible for phonon scattering while increasing electrical conductivity, thereby enhancing the thermoelectric properties. This effect of multiple extended two-dimensional defects on the thermoelectric properties of ZnO is reported for the first time with such low indium doping. On the chemistry side, the present results point toward a lack of In solubility in the ZnO structure. Moreover, this study is a step forward to the synthesis of other thermoelectric compounds where dopant-induced planar defects in bulk transition metal compounds have the potential to enhance both phonon scattering and electronic conductivity.
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Affiliation(s)
- Jean-Baptiste Labégorre
- Laboratoire CRISMAT, UMR-CNRS 6508, ENSICAEN, UNICAEN, Normandie Université , 6 Boulevard du Maréchal Juin, 14050 Caen Cedex 04, France
| | - Oleg I Lebedev
- Laboratoire CRISMAT, UMR-CNRS 6508, ENSICAEN, UNICAEN, Normandie Université , 6 Boulevard du Maréchal Juin, 14050 Caen Cedex 04, France
| | - Cédric Bourgès
- Laboratoire CRISMAT, UMR-CNRS 6508, ENSICAEN, UNICAEN, Normandie Université , 6 Boulevard du Maréchal Juin, 14050 Caen Cedex 04, France
| | - Aleksander Rečnik
- Department for Nanostructured Materials, Jožef Stefan Institute , Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Mateja Košir
- Department for Nanostructured Materials, Jožef Stefan Institute , Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Slavko Bernik
- Department for Nanostructured Materials, Jožef Stefan Institute , Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Antoine Maignan
- Laboratoire CRISMAT, UMR-CNRS 6508, ENSICAEN, UNICAEN, Normandie Université , 6 Boulevard du Maréchal Juin, 14050 Caen Cedex 04, France
| | - Thierry Le Mercier
- Solvay, Centre de Recherches d'Aubervilliers , 52 rue de la Haie-Coq, 93308 Aubervilliers Cedex, France
| | | | - Emmanuel Guilmeau
- Laboratoire CRISMAT, UMR-CNRS 6508, ENSICAEN, UNICAEN, Normandie Université , 6 Boulevard du Maréchal Juin, 14050 Caen Cedex 04, France
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7
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Guilmeau E, Díaz-Chao P, Lebedev OI, Rečnik A, Schäfer MC, Delorme F, Giovannelli F, Košir M, Bernik S. Inversion Boundaries and Phonon Scattering in Ga:ZnO Thermoelectric Compounds. Inorg Chem 2016; 56:480-487. [DOI: 10.1021/acs.inorgchem.6b02354] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Emmanuel Guilmeau
- Laboratoire CRISMAT, UMR 6508 CNRS/ENSICAEN, 6 bld Maréchal
Juin, 14050 Caen
Cedex, France
| | - Pablo Díaz-Chao
- Laboratoire CRISMAT, UMR 6508 CNRS/ENSICAEN, 6 bld Maréchal
Juin, 14050 Caen
Cedex, France
| | - Oleg I. Lebedev
- Laboratoire CRISMAT, UMR 6508 CNRS/ENSICAEN, 6 bld Maréchal
Juin, 14050 Caen
Cedex, France
| | - Aleksander Rečnik
- Department for Nanostructured
Materials, Jožef Stefan Institute, Jamova 39, Ljubljana, Slovenia
| | - Marion. C. Schäfer
- Laboratoire CRISMAT, UMR 6508 CNRS/ENSICAEN, 6 bld Maréchal
Juin, 14050 Caen
Cedex, France
| | - Fabian Delorme
- Université François Rabelais de Tours, CNRS, CEA, INSA CVL, GREMAN UMR 7347, IUT de Blois 15 rue
de la chocolaterie, 41029 Blois Cedex, France
| | - Fabien Giovannelli
- Université François Rabelais de Tours, CNRS, CEA, INSA CVL, GREMAN UMR 7347, IUT de Blois 15 rue
de la chocolaterie, 41029 Blois Cedex, France
| | - Mateja Košir
- Department for Nanostructured
Materials, Jožef Stefan Institute, Jamova 39, Ljubljana, Slovenia
| | - Slavko Bernik
- Department for Nanostructured
Materials, Jožef Stefan Institute, Jamova 39, Ljubljana, Slovenia
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Goldstein AP, Andrews SC, Berger RF, Radmilovic VR, Neaton JB, Yang P. Zigzag inversion domain boundaries in indium zinc oxide-based nanowires: structure and formation. ACS NANO 2013; 7:10747-10751. [PMID: 24237264 DOI: 10.1021/nn403836d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Existing models for the crystal structure of indium zinc oxide (IZO) and indium iron zinc oxide (IFZO) conflict with electron microscopy data. We propose a model based on imaging and spectroscopy of IZO and IFZO nanowires and verify it using density functional theory. The model features a {121 [symbol: see text]} "zigzag" layer, which is an inversion domain boundary containing 5-coordinate indium and/or iron atoms. Higher [symbol: see text] values are observed for greater proportion of iron. We suggest a mechanism of formation in which the basal inclusion and the zigzag diffuse inward together from the surface of the nanowire.
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