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Albrecht EK, Siponkoski T, Rautama EL, Karppinen M, Karttunen AJ. Centrosymmetric to non-centrosymmetric transition in the Ca 2-xMn xTi 2O 6 double perovskite system studied through structural analysis and dielectric properties. Dalton Trans 2024; 53:6282-6288. [PMID: 38482938 DOI: 10.1039/d4dt00360h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
We have used high-pressure synthesis to synthesize samples of Ca2-xMnxTi2O6 double perovskite, where x varies between 0.2 and 1. The synthesized materials were structurally characterized with powder X-ray diffraction (XRD). Rietveld refinement of the XRD patterns was used to study the change from CaTiO3 (x = 0) to the composition CaMnTi2O6 (x = 1) where half of the Ca(II) ions are replaced by smaller Mn(II) ions. We analyzed the peak shapes in the XRD patterns, as well as lattice parameters, and it appears that smooth symmetry change from the centrosymmetric space group Pbnm to the non-centrosymmetric space group P42mc occurs between x = 0.3 and x = 0.5. We also confirmed the centrosymmetric to non-centrosymmetric transition by characterizing the dielectric properties of the materials with ferroelectric measurements.
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Affiliation(s)
- Elisabeth K Albrecht
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland.
| | - Tuomo Siponkoski
- Microelectronics Research Unit, University of Oulu, P.O. Box 4500, FI-90014 Oulu, Finland
| | - Eeva-Leena Rautama
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland.
| | - Maarit Karppinen
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland.
| | - Antti J Karttunen
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland.
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2
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Albrecht EK, Karttunen AJ. Investigation on the predictive power of tolerance factor τ for A-site double perovskite oxides. Dalton Trans 2023; 52:12461-12469. [PMID: 37602407 DOI: 10.1039/d3dt01990j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
We have used a recently introduced new tolerance factor τ to create a stability map of all possible A-site double perovskite titanates AA'Ti2O6 and niobates AA'Nb2O6. The predictive power of τ is relatively good based on comparisons with available experimental data for A-site double perovskites. We carried out quantum chemical calculations on two hypothetical double perovskite compositions CsScTi2O6 and YRbTi2O6, where τ predicts high probability for their existence. In both cases, we found limits in the predictive power of the new tolerance factor for ion combinations on the A and A' site which are very different in size. A difference in oxidation state may decrease the accuracy, as well. Overall, the A-site double perovskite stability mapping provides a starting point for the discovery of novel A-site double perovskites.
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Affiliation(s)
- Elisabeth K Albrecht
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland.
| | - Antti J Karttunen
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland.
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3
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Fukuda M, Nishikubo T, Yu H, Okimoto Y, Koshihara SY, Yamaura K, Azuma M. A-Site Columnar-Ordered Perovskite CaZnV 2O 6 as a Pauli-Paramagnetic Metal. Inorg Chem 2023; 62:8372-8378. [PMID: 37192407 DOI: 10.1021/acs.inorgchem.3c00940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In this study, we successfully synthesized a novel A-site columnar-ordered perovskite CaZnV2O6. This compound features a square-planar-coordinated Zn2+ disorder, which is the same characteristic as the centrosymmetric paraelectric CaMnTi2O6. Unlike CaMnTi2O6, which shows a centrosymmetric paraelectric-noncentrosymmetric ferroelectric transition, CaZnV2O6 retains Pauli-paramagnetic metallicity arising from itinerant V4+ d1 electrons and centrosymmetry down to 5 K. Based on analogous compounds, we expect CaZnV2O6 to provide a new playground for the electronic and magnetic states of V4+.
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Affiliation(s)
- Masayuki Fukuda
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Takumi Nishikubo
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Kanagawa Institute of Industrial Science and Technology, 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan
| | - Hongwu Yu
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Yoichi Okimoto
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Shin-Ya Koshihara
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Kazunari Yamaura
- Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 10 West 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masaki Azuma
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Kanagawa Institute of Industrial Science and Technology, 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan
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4
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Zaraq A, Orayech B, Igartua JM, El Bouari A, Gregory DH, Gesing TM. Crystallography at non-ambient conditions and physical properties of the synthesized double perovskites, Sr 2(Co 1-xFe x)TeO 6. Dalton Trans 2023; 52:4086-4102. [PMID: 36880967 DOI: 10.1039/d2dt03543j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Polycrystalline double perovskite-type Sr2(Co1-xFex)TeO6 with various stoichiometric compositions (x = 0, 0.25, 0.5, 0.75, and 1) were synthesized by solid-state reactions in air. The crystal structures and phase transitions of this series at different temperature intervals were determined by X-ray powder diffraction, and from the obtained data the crystal structures were refined. It has been proven that for the compositions x = 0.25, 0.50, and 0.75, the phases crystallize at room temperature in the monoclinic space group I2/m. Down to 100 K, depending on the composition, these structures experience a phase transition from I2/m to P21/n. At high temperatures up to 1100 K their crystal structures show two further phase transitions. The first one is a first-order phase transition, from monoclinic I2/m to tetragonal I4/m, followed by a second-order phase transition to cubic Fm3̄m. Therefore, the phase transition sequence of this series detected at temperatures ranging from 100 K to 1100 K is P21/n → I2/m → I4/m → Fm3̄m. The temperature-dependent vibrational features of the octahedral sites were investigated by Raman spectroscopy, which furthermore complements the XRD results. A decrease in the phase-transition temperature with increasing iron content has been observed for these compounds. This fact is explained by the progressive diminishing of the distortion of the double-perovskite structure in this series. Using room-temperature Mössbauer spectroscopy, the presence of two iron sites is confirmed. The two different transition metal cations Co and Fe at the B sites allow exploring their effect on the optical band-gap.
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Affiliation(s)
- Asmaa Zaraq
- University of Bremen, Institute of Inorganic Chemistry and Crystallography, Bremen, Germany.
| | - Brahim Orayech
- Maxam, Technology Center Energetic Materials, Carretera N-623 km 28, 09141Quintanilla Sobresierra, Burgos, Spain
| | - Josu M Igartua
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU: Leioa, Bizkaia, España
| | - Abdeslam El Bouari
- Laboratory of Physical-Chemistry, Materials and Catalysis, Department of Chemistry, Faculty of Sciences Ben M'Sik, University Hassan II of Casablanca, Casablanca, Morocco
| | - Duncan H Gregory
- WestCHEM School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow G12 8QQ, UK
| | - Thorsten M Gesing
- University of Bremen, Institute of Inorganic Chemistry and Crystallography, Bremen, Germany. .,University of Bremen, MAPEX Center for Materials and Processes, Bremen, Germany
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5
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Banerjee A, Awasthi MK, Maji P, Pal M, Aziz ST, Lahiri GK, Dutta A. Double Perovskite Oxides Bringing a Revelation in Oxygen Evolution Reaction Electrocatalyst Design. ChemElectroChem 2023. [DOI: 10.1002/celc.202201098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Anwesha Banerjee
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | | | - Pramathesh Maji
- Chemistry Department University of New Orleans New Orleans LA 70148 USA
| | - Manodip Pal
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sheikh Tarik Aziz
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Goutam K. Lahiri
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Arnab Dutta
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
- Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Powai Mumbai 400076 India
- National Center of Excellence CCU Indian Institute of Technology Bombay Powai Mumbai 400076 India
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6
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Solana-Madruga E, Arévalo-López A. High-pressure A-site manganites: Structures and magnetic properties. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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7
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Xu Q, Ye L, Liao R, An Z, Wang C, Miao L, Shi C, Ye H, Zhang Y. H/F Substitution Induced Large Increase of
T
c
in a 3D Hybrid Rare‐Earth Double Perovskite Multifunctional Compound. Chemistry 2022; 28:e202103913. [DOI: 10.1002/chem.202103913] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Indexed: 01/07/2023]
Affiliation(s)
- Qi Xu
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
| | - Le Ye
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
| | - Rong‐Meng Liao
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
| | - Zhen An
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
| | - Chang‐Feng Wang
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
| | - Le‐Ping Miao
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
| | - Chao Shi
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
| | - Heng‐Yun Ye
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
| | - Yi Zhang
- Jiangxi University of Science and Technology Chaotic Matter Science Research Center
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8
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Albrecht EK, Karttunen AJ. Structural principles of cation ordering and octahedral tilting in A-site ordered double perovskites: ferroelectric CaMnTi 2O 6 as a model system. Dalton Trans 2022; 51:16508-16516. [DOI: 10.1039/d2dt02283d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum chemical methods have been used to study systematically all relevant combinations of cation ordering and tilting in A-site ordered AA′B2O6 double perovskites.
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Affiliation(s)
- Elisabeth K. Albrecht
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Antti J. Karttunen
- Department of Chemistry and Materials Science, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
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9
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Wolf NR, Connor BA, Slavney AH, Karunadasa HI. Doubling the Stakes: The Promise of Halide Double Perovskites. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nathan R. Wolf
- Department of Chemistry Stanford University Stanford California 94305 USA
| | - Bridget A. Connor
- Department of Chemistry Stanford University Stanford California 94305 USA
| | - Adam H. Slavney
- Department of Chemistry Stanford University Stanford California 94305 USA
| | - Hemamala I. Karunadasa
- Department of Chemistry Stanford University Stanford California 94305 USA
- Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo Park California 94025 USA
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10
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Wolf NR, Connor BA, Slavney AH, Karunadasa HI. Doubling the Stakes: The Promise of Halide Double Perovskites. Angew Chem Int Ed Engl 2021; 60:16264-16278. [DOI: 10.1002/anie.202016185] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Nathan R. Wolf
- Department of Chemistry Stanford University Stanford California 94305 USA
| | - Bridget A. Connor
- Department of Chemistry Stanford University Stanford California 94305 USA
| | - Adam H. Slavney
- Department of Chemistry Stanford University Stanford California 94305 USA
| | - Hemamala I. Karunadasa
- Department of Chemistry Stanford University Stanford California 94305 USA
- Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo Park California 94025 USA
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11
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Cao Y, Liang J, Li X, Yue L, Liu Q, Lu S, Asiri AM, Hu J, Luo Y, Sun X. Recent advances in perovskite oxides as electrode materials for supercapacitors. Chem Commun (Camb) 2021; 57:2343-2355. [PMID: 33595045 DOI: 10.1039/d0cc07970g] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Owing to the high power density and ultralong cycle life, supercapacitors represent an alternative to electrochemical batteries in energy storage applications. However, the relatively low energy density is the main challenge for supercapacitors in the current drive to push the entire technology forward to meet the benchmark requirements for commercialization. To effectively solve this issue, it is crucial to develop electrode materials with excellent electrochemical performance since the electrode used is closely related to the specific capacitance and energy density of supercapacitors. With the unique structure, compositional flexibility, and inherent oxygen vacancy, perovskite oxides have attracted wide attention as promising electrode materials for supercapacitors. In this review, we summarize the recent advances in perovskite oxides as electrode materials for supercapacitors. Firstly, the structures and compositions of perovskite oxides are critically reviewed. Following this, the progress in various perovskite oxides, including single perovskite and derivative perovskite oxides, is depicted, focusing on their electrochemical performance. Furthermore, several optimization strategies (i.e., modulating the stoichiometry of the anion or cation, A-site doping, B-site doping, and constructing composites) to improve their electrochemical performance are also discussed. Finally, the significant challenges facing the advancement of perovskite oxide electrodes for supercapacitor applications and future outlook are proposed.
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Affiliation(s)
- Yang Cao
- School of Physics and Electrical Engineering, Chongqing Normal University, Chongqing 401331, China.
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12
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Fukuda M, Nishikubo T, Pan Z, Sakai Y, Zhang MH, Kawaguchi S, Yu H, Okimoto Y, Koshihara SY, Itoh M, Rödel J, Azuma M. Enhanced Spontaneous Polarization by V 4+ Substitution in a Lead-Free Perovskite CaMnTi 2O 6. Inorg Chem 2020; 59:11749-11756. [PMID: 32799500 DOI: 10.1021/acs.inorgchem.0c01697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Spontaneous polarization (Ps) of novel order-disorder type lead-free ferroelectric CaMnTi2O6 was successfully enhanced by partial V4+ substitution for Ti4+. A synchrotron X-ray diffraction study revealed that the polar displacement of octahedrally coordinated (Ti, V) in CaMn(Ti1-xVx)2O6 (0 ≤ x ≤ 0.4) increases with V4+ substitution having Jahn-Teller activity owing to the d1 electronic configuration. Our magnetic study suggested the presence of antisite disorder between Ca2+ and square planar coordinated Mn2+ associated with Mn-V intermetallic charge transfer for x ≥ 0.4, resulting in decreases in spontaneous polarization and the ferroelectric-paraelectric transition temperature. This is the first report on the enhanced polarization owing to the Jahn-Teller distortion of V4+ without stereochemical Pb2+ or Bi3+.
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Affiliation(s)
- Masayuki Fukuda
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Takumi Nishikubo
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Zhao Pan
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yuki Sakai
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.,Kanagawa Institute of Industrial Science and Technology, 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan
| | - Mao-Hua Zhang
- Department of Materials and Earth Sciences, Nonmetallic Inorganic Materials, Technical University of Darmstadt, Darmstadt, Germany
| | - Shogo Kawaguchi
- Diffraction and Scattering Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Hongwu Yu
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Yoichi Okimoto
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Shin-Ya Koshihara
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Mitsuru Itoh
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Jürgen Rödel
- Department of Materials and Earth Sciences, Nonmetallic Inorganic Materials, Technical University of Darmstadt, Darmstadt, Germany.,Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Masaki Azuma
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.,Kanagawa Institute of Industrial Science and Technology, 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan
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13
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Affiliation(s)
- Ilya Grinberg
- Department of Chemistry Bar Ilan University Ramat Gan Israel
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14
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Tao C, Li R. KNiB
4
O
6
F
3
: A Layered Fluorooxoborate with Charge‐Oriented Ordering. Chemistry 2020; 26:3709-3712. [DOI: 10.1002/chem.201905182] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Ce Tao
- Center for Crystal Research and DevelopmentKey Laboratory of Functional Crystals and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Rukang Li
- Center for Crystal Research and DevelopmentKey Laboratory of Functional Crystals and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
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15
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Theofylaktos L, Kosmatos KO, Giannakaki E, Kourti H, Deligiannis D, Konstantakou M, Stergiopoulos T. Perovskites with d-block metals for solar energy applications. Dalton Trans 2019; 48:9516-9537. [PMID: 31225556 DOI: 10.1039/c9dt01485c] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Pb2+ halide organic-inorganic perovskites are excellent semiconductors for use in solar energy applications, but at the expense of robustness and environmental compatibility. Tin (Sn), which sits just above lead in the periodic table, forms pure (or mixed with lead) perovskites when at the 2+ or 4+ oxidation state. It can act as a promising alternative; however, there are still some serious concerns regarding its suitability. This presents a major challenge; viable metal cations have to be identified. A good number of elements, originating from a large range of d-block metal ions, with adequate oxidation states, moderate toxicity, and relative abundance, seem ideal for this purpose. In this review, we present the most characteristic perovskites (conventional perovskites, layered, or double perovskites) that can be formed with the help of these metals. We focus on d-block metal ions with stable oxidation states, such as Ag+ or Ti4+, which have exhibited satisfactory photovoltaic properties until now. Further, we highlight the results involving compounds other than halide perovskites, such as oxides, chalcogenides, and nitrides (as well as oxyhalides, oxysulfides, and oxynitrides); a few of them are ferroelectric (based on Ti4+, Zr4+, Fe3+, and Cr3+) and can yield a photovoltage that exceeds the bandgap of the material. Finally, we present the critical challenges that currently limit the efficiency of these systems and propose prospects for future directions.
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Affiliation(s)
- Lazaros Theofylaktos
- Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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16
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Electron-hole separation in ferroelectric oxides for efficient photovoltaic responses. Proc Natl Acad Sci U S A 2018; 115:6566-6571. [PMID: 29891684 PMCID: PMC6042087 DOI: 10.1073/pnas.1721503115] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Photovoltaics (PVs) benefitting from ferroelectric polarizations can overcome critical limitations of conventional type PVs. In this class, Bi2FeCrO6 is known to be the best-performing material; however, a fundamental understanding of the origin is lacking, which has limited further performance improvements. Here, we carried out a theoretical investigation of the electronic structure of this material. As a result, electron−hole (e-h) pairs are observed to separate upon photoexcitation, which can be a dominant underlying mechanism for the exceptional PV responses. Based on this understanding, we further suggest five novel materials that can offer a combination of strong e-h separations and visible-light absorptions. We expect the community of ferroelectric PVs to immediately benefit from the features of the new suggested materials. Despite their potential to exceed the theoretical Shockley−Queisser limit, ferroelectric photovoltaics (FPVs) have performed inefficiently due to their extremely low photocurrents. Incorporating Bi2FeCrO6 (BFCO) as the light absorber in FPVs has recently led to impressively high and record photocurrents [Nechache R, et al. (2015) Nat Photonics 9:61–67], which has revived the FPV field. However, our understanding of this remarkable phenomenon is far from satisfactory. Here, we use first-principles calculations to determine that such excellent performance mainly lies in the efficient separation of electron−hole (e-h) pairs. We show that photoexcited electrons and holes in BFCO are spatially separated on the Fe and Cr sites, respectively. This separation is much more pronounced in disordered BFCO phases, which adequately explains the observed exceptional PV responses. We further establish a design strategy to discover next-generation FPV materials. By exploring 44 additional Bi-based double-perovskite oxides, we suggest five active-layer materials that offer a combination of strong e-h separations and visible-light absorptions for FPV applications. Our work indicates that charge separation is the most important issue to be addressed for FPVs to compete with conventional devices.
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17
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Belik AA. Rise of A-site columnar-ordered A 2A'A''B 4O 12 quadruple perovskites with intrinsic triple order. Dalton Trans 2018; 47:3209-3217. [PMID: 29384532 DOI: 10.1039/c7dt04490a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A-site-ordered AA'3B4O12 quadruple perovskites (with twelve-fold coordinated A and square-planar coordinated A' sites) were discovered in 1967. Since then, there have been considerable research efforts to synthesize and characterize new members of such perovskites. These efforts have led to the discoveries of many interesting physical and chemical properties, such as inter-site charge transfer and disproportionation, giant dielectric constant, multiferroic properties, reentrant structural transitions and high catalytic activity. The first member of A-site columnar-ordered A2A'A''B4O12 quadruple perovskites (with ten-fold coordinated A, square-planar coordinated A' and tetrahedrally coordinated A'' sites), CaFeTi2O6, was discovered in 1995, and for 19 years it was the only representative of this family. In the last few years, A2A'A''B4O12 perovskites have experienced rapid growth. Herein, we present a brief overview of the recent developments in this field and highlight an under-investigated status and great potential of A2A'A''B4O12, which can be prepared mainly at high pressure and high temperature. The presence of the A'' site gives an additional degree of freedom in designing such perovskites. The A2A'A''B4O12 perovskites are discussed in comparison with well-known AA'3B4O12 perovskites.
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Affiliation(s)
- Alexei A Belik
- Research Center for Functional Materials, National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
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Li Z, Cho Y, Li X, Li X, Aimi A, Inaguma Y, Alonso JA, Fernandez-Diaz MT, Yan J, Downer MC, Henkelman G, Goodenough JB, Zhou J. New Mechanism for Ferroelectricity in the Perovskite Ca2–xMnxTi2O6 Synthesized by Spark Plasma Sintering. J Am Chem Soc 2018; 140:2214-2220. [DOI: 10.1021/jacs.7b11219] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zongyao Li
- Material
Science and Engineering Program, Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Yujin Cho
- Department
of Physics, University of Texas at Austin, Austin, Texas 78712, United States
| | - Xiang Li
- Material
Science and Engineering Program, Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Xinyu Li
- Material
Science and Engineering Program, Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Akihisa Aimi
- Department
of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
| | - Yoshiyuki Inaguma
- Department
of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro,
Toshima-ku, Tokyo 171-8588, Japan
| | - Jose A. Alonso
- Instituto
de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28094 Madrid, Spain
| | | | - Jiaqiang Yan
- Materials
Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Michael C. Downer
- Department
of Physics, University of Texas at Austin, Austin, Texas 78712, United States
| | - Graeme Henkelman
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - John B. Goodenough
- Material
Science and Engineering Program, Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Jianshi Zhou
- Material
Science and Engineering Program, Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
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