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Dixit P, Jana SS, Maiti T. Enhanced Thermoelectric Performance of Rare-Earth-Free n-Type Oxide Perovskite Composite with Graphene Analogous 2D MXene. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206710. [PMID: 36852637 DOI: 10.1002/smll.202206710] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/08/2023] [Indexed: 06/02/2023]
Abstract
Here, the first experimental demonstration on the effect of incorporating new generation 2D material, MXene, on the thermoelectric performance of rare-earth-free oxide perovskite is reported. The charge localization phenomenon is predominant in the electron transport of doped SrTiO3 perovskites, which deters from achieving a higher thermoelectric power factor in these oxides. In this work, it is shown that incorporating Ti3 C2 Tx MXene in a matrix of SrTi0.85 Nb0.15 O3 (STN) facilitates the delocalization of electrons resulting in better than single-crystal-like electron mobility in polycrystalline composites. A 1851% increase in electrical conductivity and a 1000% enhancement in power factor are attained. Besides, anharmonicity caused by MXene in the STN matrix has led to enhanced Umklapp scattering giving rise to lower lattice thermal conductivity. Hence, 700% ZT enhancement is achieved in this composite. Further, a prototype of thermoelectric generator (TEG) using only n-type STN + MXene is fabricated and a power output of 38 mW is obtained, which is higher than the reported values for oxide TEG.
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Affiliation(s)
- Pragya Dixit
- Plasmonics and Perovskites Laboratory, Department of Materials Science and Engineering, IIT Kanpur, Kanpur, Uttar Pradesh, 208016, India
| | - Subhra Sourav Jana
- Plasmonics and Perovskites Laboratory, Department of Materials Science and Engineering, IIT Kanpur, Kanpur, Uttar Pradesh, 208016, India
| | - Tanmoy Maiti
- Plasmonics and Perovskites Laboratory, Department of Materials Science and Engineering, IIT Kanpur, Kanpur, Uttar Pradesh, 208016, India
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Jana SS, Maiti T. Enhanced Thermoelectric Performance in Oxide Composites of La and Nb Codoped SrTiO 3 by Using Graphite as the Electron Mobility Booster. ACS APPLIED MATERIALS & INTERFACES 2022; 14:14174-14181. [PMID: 35290035 DOI: 10.1021/acsami.1c24625] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Inherent insulating nature of oxides makes it challenging for use in thermoelectric applications that warrant reasonable electrical conductivity. In the present work, we have used graphite (G) to improve the electron transport in La0.07Sr0.93Ti0.93Nb0.07O3 (LSTN) by making composites. Graphite acts as the electron momentum booster in the LSTN matrix, which otherwise suffers from Anderson localization of electrons, causing an order of magnitude increase in weighted mobility and electrical conductivity. As a result, the thermoelectric power factor increases more than 6 times due to graphite incorporation in LSTN. Furthermore, the lattice thermal conductivity is suppressed due to enhanced Umklapp scattering, as derived from the Debye-Callaway model. Hence, we have recorded ∼423% increment in the figure of merit (ZT) in LSTN + G composites. The maximum ZT obtained is 0.68 at 980 K for the LSTN with 1 wt % graphite composite. Furthermore, we have fabricated a four-legged n-type thermoelectric power generator demonstrating a milliwatt level power output, which hitherto remained unattainable for oxide thermoelectrics.
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Affiliation(s)
- Subhra Sourav Jana
- Plasmonics and Perovskites Laboratory, Department of Materials Science and Engineering, IIT Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Tanmoy Maiti
- Plasmonics and Perovskites Laboratory, Department of Materials Science and Engineering, IIT Kanpur, Kanpur, Uttar Pradesh 208016, India
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Hira U, Bos JWG, Missyul A, Fauth F, Pryds N, Sher F. Ba 2-xBi xCoRuO 6 (0.0 ≤ x ≤ 0.6) Hexagonal Double-Perovskite-Type Oxides as Promising p-Type Thermoelectric Materials. Inorg Chem 2021; 60:17824-17836. [PMID: 34743519 DOI: 10.1021/acs.inorgchem.1c02442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new series of Ba2-xBixCoRuO6 (0.0 ≤ x ≤ 0.6) hexagonal double perovskite oxides have been synthesized by a solid-state reaction method by substituting Ba with Bi. The polycrystalline materials are structurally characterized by the laboratory X-ray diffraction, synchrotron X-ray, and neutron powder diffraction. The lattice parameters are found to increase with increasing Bi doping despite the smaller ionic radius of Bi3+ compared to Ba2+. The expansion is attributed to the reduction of Co/Ru-site cations. Scanning electron microscopy further shows that the grain size increases with the Bi content. All Ba2-xBixCoRuO6 (0.0 ≤ x ≤ 0.6) samples exhibit p-type behavior, and the electrical resistivity (ρ) is consistent with a small polaron hopping model. The Seebeck coefficient (S) and thermal conductivity (κ) are improved significantly with Bi doping. High values of the power factor (PF ∼ 6.64 × 10-4 W/m·K2) and figure of merit (zT ∼ 0.23) are obtained at 618 K for the x = 0.6 sample. These results show that Bi doping is an effective approach for enhancing the thermoelectric properties of hexagonal Ba2-xBixCoRuO6 perovskite oxides.
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Affiliation(s)
- Uzma Hira
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, 54792 Lahore, Pakistan.,School of Physical Sciences, University of the Punjab, New Campus, 54590 Lahore, Pakistan
| | - Jan-Willem G Bos
- Institute of Chemical Sciences and Centre for Advanced Energy Storage and Recovery, School of Engineering and Physical Sciences, Heriot-Watt University, EH14 4AS Edinburgh, United Kingdom
| | - Alexander Missyul
- CELLS-ALBA Synchrotron, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
| | - François Fauth
- CELLS-ALBA Synchrotron, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
| | - Nini Pryds
- Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, 2800 Kongens Lyngby, Denmark
| | - Falak Sher
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, 54792 Lahore, Pakistan
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Kumar P, Mulmi S, Laishram D, Alam KM, Thakur UK, Thangadurai V, Shankar K. Water-splitting photoelectrodes consisting of heterojunctions of carbon nitride with a p-type low bandgap double perovskite oxide. NANOTECHNOLOGY 2021; 32:485407. [PMID: 33706303 DOI: 10.1088/1361-6528/abedec] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
Quinary and senary non-stoichiometric double perovskites such as Ba2Ca0.66Nb1.34-xFexO6-δ(BCNF) have been utilized for gas sensing, solid oxide fuel cells and thermochemical CO2reduction. Herein, we examined their potential as narrow bandgap semiconductors for use in solar energy harvesting. A cobalt co-doped BCNF, Ba2Ca0.66Nb0.68Fe0.33Co0.33O6-δ(BCNFCo), exhibited an optical absorption edge at ∼800 nm,p-type conduction and a distinct photoresponse up to 640 nm while demonstrating high thermochemical stability. A nanocomposite of BCNFCo and g-C3N4(CN) was prepared via a facile solvent-assisted exfoliation/blending approach using dichlorobenzene and glycerol at a moderate temperature. The exfoliation of g-C3N4followed by wrapping on perovskite established an effective heterojunction between the materials for charge separation. The conjugated 2D sheets of CN enabled better charge migration resulting in increased photoelectrochemical performance. A blend composed of 40 wt% perovskites and CN performed optimally, whilst achieving a photocurrent density as high as 1.5 mA cm-2for sunlight-driven water-splitting with a Faradaic efficiency as high as ∼88%.
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Affiliation(s)
- Pawan Kumar
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
| | - Suresh Mulmi
- Department of Chemistry, University of Calgary, 2500 University Dr NW, Calgary, Alberta, T2N 1N4, Canada
| | - Devika Laishram
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan, 342011, India
| | - Kazi M Alam
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
| | - Ujwal K Thakur
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
| | - Venkataraman Thangadurai
- Department of Chemistry, University of Calgary, 2500 University Dr NW, Calgary, Alberta, T2N 1N4, Canada
| | - Karthik Shankar
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
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Sri Gyan D, Sundram V, Dwivedi A, Bhowmick S, Maiti T. Effect of B-site cation ordering on high temperature thermoelectric behavior of Ba x Sr 2-x TiFeO 6 double perovskites. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:235401. [PMID: 32050180 DOI: 10.1088/1361-648x/ab7575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Here, we have reported the detailed structural analysis in correlation with thermoelectric properties of Ba doped Sr2TiFeO6 (BSTF) double perovskites in the temperature range from 300 K to 1100 K. BSTF compositions exhibit single phase cubic structure with [Formula: see text] crystal symmetry from room temperature to 523 K and also at temperature beyond 923K. Rietveld refinement of high temperature XRD data suggests the coexistence of two cubic phases with [Formula: see text] space group having same composition in the intermediate temperature region. Correlation of the phase-fraction with electrical conductivity data posits the possibility of high temperature cubic phase being conductive compared to the insulator-like cubic phase observed at room temperature. The experimental analysis alone seems insufficient to explain the conductivity behavior demonstrating semiconductor [Formula: see text] to metal like [Formula: see text] transition. Hence DFT framework has been adopted for computational analysis coupled with the Boltzmann transport equations to understand their thermoelectric properties based on the electronic restructuring occurred due to octahedral arrangements in these double perovskites. It has been shown that clustering of FeO6 octahedra may lead to the formation of a conduction path in the cubic phase of BSTF, which induces metallic behavior in these double perovskites.
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Affiliation(s)
- Deepankar Sri Gyan
- Department of Ceramic Engineering, Indian Institute of Technology (BHU), Varanasi, UP, 221005, India
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Qu S, Wang Y, Xiao Y, Yuan Y, Li S, Chen J, Zhao L, Xia Z, Zhao J. Temperature-driven n-p conduction type switching without structural transition in a Cu-rich chalcogenide, NaCu 5S 3. Chem Commun (Camb) 2020; 56:4882-4885. [PMID: 32285903 DOI: 10.1039/d0cc01429j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report for the first time the discovery of reversible n-p conduction type switching in a chalcogenide, NaCu5S3, without structural transition. AC impedance and first-principles simulations of the ionic migration confirmed the local melting trends of the hexagonal copper lattice at high temperatures, which could result in superionic conductivity within NaCu5S3.
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Affiliation(s)
- Shangqing Qu
- The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China. and Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100094, China.
| | - Yonggang Wang
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100094, China.
| | - Yu Xiao
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Yujie Yuan
- The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Shengyi Li
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China and School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jikun Chen
- The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Lidong Zhao
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Zhiguo Xia
- The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China. and State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou, 510641, China
| | - Jing Zhao
- The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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Wen T, Wang Y, Li N, Zhang Q, Zhao Y, Yang W, Zhao Y, Mao HK. Pressure-Driven Reversible Switching between n- and p-Type Conduction in Chalcopyrite CuFeS 2. J Am Chem Soc 2018; 141:505-510. [PMID: 30484644 DOI: 10.1021/jacs.8b11269] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Temperature-dependent switching between p- and n-type conduction is a newly observed phenomenon in very few Ag-based semiconductors, which may promote fascinating applications in modern electronics. Pressure, as an efficient external stimulus that has driven collective phenomena such as spin-crossover and Mott transition, is also expected to initialize a conduction-type switching in transition metal-based semiconductors. Herein, we report the observation of a pressure-driven dramatic switching between p- and n-type conduction in chalcopyrite CuFeS2 associated with a structural phase transition. Under compression around 8 GPa, CuFeS2 undergoes a phase transition with symmetry breakdown from space group I-42 d to space group I-4 accompanying with a remarkable volume shrinkage of the FeS4 tetrahedra. A high-to-low spin-crossover of Fe2+ ( S = 2 to S = 0) is manifested along with this phase transition. Instead of pressure-driven metallization, a surprising semiconductor-to-semiconductor transition is observed associated with the structural and electronic transformations. Significantly, both photocurrent and Hall coefficient measurements confirm that CuFeS2 undergoes a reversible pressure-driven p- n conduction type switching accompanying with the structural phase transition. The absence of cationic charge transfer between copper and iron during the phase transition is confirmed by both X-ray absorption near-edge spectra (Cu/Fe, K-edge) and total-fluorescence-yield X-ray absorption spectra (Fe, K-edge) results, and the valence distribution maintains Cu2+Fe2+S2 in the high-pressure phase. The observation of an abrupt pressure-driven p- n conduction type switching in a transition metal-based semiconductor paves the way to novel pressure-responsive switching devices.
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Affiliation(s)
- Ting Wen
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , Beijing 100094 , China
| | - Yonggang Wang
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , Beijing 100094 , China
| | - Nana Li
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , Beijing 100094 , China
| | - Qian Zhang
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , Beijing 100094 , China
| | - Yongsheng Zhao
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , Beijing 100094 , China
| | - Wenge Yang
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , Beijing 100094 , China
| | - Yusheng Zhao
- Department of Physics and Academy for Advanced Interdisciplinary Studies , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Ho-Kwang Mao
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , Beijing 100094 , China
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Thanka Rajan S, Bendavid A, Subramanian B. Cytocompatibility assessment of Ti-Nb-Zr-Si thin film metallic glasses with enhanced osteoblast differentiation for biomedical applications. Colloids Surf B Biointerfaces 2018; 173:109-120. [PMID: 30273871 DOI: 10.1016/j.colsurfb.2018.09.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/02/2018] [Accepted: 09/19/2018] [Indexed: 01/17/2023]
Abstract
Biologically safe Ti-based quaternary Ti-Nb-Zr-Si thin film metallic glass (TFMG) was fabricated by sputtering on Titanium alloy (Ti6Al4V or Ti alloy) substrates. A preliminary assessment regarding glass forming ability, thermal stability and corrosion behavior was performed. The amorphous nature of the film is evidenced from the X-ray Diffraction (XRD) and Transmission Electron Microscope (TEM) and Selected Area Electron Diffraction (SAED) patterns. Ion scattering spectroscopy (ISS) and X-ray Photoelectron Spectroscopy (XPS) were used to analyse the chemical composition of surface which indicated oxygen on the top surface of the film and confirms the presence of Ti, Nb, Si, Zr without any other impurities. The surface morphology of the film showed a smooth surface as observed from scanning electron microscope (SEM) and atomic force microscope (AFM) analysis. It is found that the TFMG can sustain in the body-fluid, exhibiting superior corrosion resistance and electrochemical stability than the bare titanium. The cytotoxicity studies with L929 fibroblast cells showed that coatings were graded as zero and non-cytotoxic in nature. No hemolysis was observed on the coated surface indicating a better hemocompatibility. Assay using SaOS-2 bone cells showed good growth on the coated surfaces. The calcium assay showed that the SaOS-2 cells grown and differentiated on the control (Tissue Culture Polystyrene) TCPS surface had the highest mineral level. Higher alkaline phosphatase activity is obtained in SaOS-2 osteoblast cell cultures on TFMG than the control.
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Affiliation(s)
- S Thanka Rajan
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, India; CSIR-CECRI, Karaikudi, 630 006, India
| | - A Bendavid
- Design Surfaces and Functionality, CSIRO Manufacturing Business Unit, Lindfield, 2070, Sydney, Australia
| | - B Subramanian
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, India; CSIR-CECRI, Karaikudi, 630 006, India.
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