1
|
Xie T, Tao B, Zhao R, Zhang T, Chen X, Yang K, Li Z, Xia Y, Tian H, Ming G. Laser-induced transverse voltage effect in c-axis inclined La xSr 1-xTiO 3thin films prepared by MOCVD. NANOTECHNOLOGY 2024; 35:275202. [PMID: 38522106 DOI: 10.1088/1361-6528/ad373e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 03/24/2024] [Indexed: 03/26/2024]
Abstract
Light and thermal detectors based on the laser-induced transverse voltage (LITV) effect have garnered significant interest for their rapid and broad spectral response. In this study, we prepared the La-doped SrTiO3(STO) epitaxial thin films on the 12° inclined single crystal LaAlO3(LAO) (100) substrates using our home-designed metal-organic chemical vapor deposition system. Under the illumination of a 248 nm laser, the LITV signals of LaxSr1-xTiO3films were observed and showed dependence on the La doping level, which can be explained by the changes in the light absorption coefficient, thermal conductivity, and optical penetration depth. The optimized LITV signal was observed with a peak voltage of 23.25 V and a decay time of 106 ns under the laser power density of 1.0 mJ mm-2. The high peak voltage and fast response time of LaxSr1-xTiO3show great potential in the field of light and thermal detection.
Collapse
Affiliation(s)
- Tian Xie
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China
| | - Bowan Tao
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China
| | - Ruipeng Zhao
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China
| | - Tong Zhang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China
| | - Xi Chen
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China
| | - Kai Yang
- Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center (CARDC), Mianyang 621000, People's Republic of China
| | - Zhenzhe Li
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China
| | - Yudong Xia
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Hongbo Tian
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China
| | - Guoliang Ming
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China
| |
Collapse
|
2
|
Zhu Y, Azough F, Liu X, Zhong X, Zhao M, Margaronis K, Kar-Narayan S, Kinloch I, Lewis DJ, Freer R. Precursor-Led Grain Boundary Engineering for Superior Thermoelectric Performance in Niobium Strontium Titanate. ACS APPLIED MATERIALS & INTERFACES 2023; 15:13097-13107. [PMID: 36854123 PMCID: PMC10020962 DOI: 10.1021/acsami.2c22712] [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: 12/19/2022] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
We present a novel method to significantly enhance the thermoelectric performance of ceramics in the model system SrTi0.85Nb0.15O3 through the use of the precursor ammonium tetrathiomolybdate (0.5-2% w/w additions). After sintering the precursor-infused green body at 1700 K for 24 h in 5% H2/Ar, single-crystal-like electron transport behavior developed with electrical conductivity reaching ∼3000 S/cm at ∼300 K, almost a magnitude higher than that in the control sample. During processing, the precursor transformed into MoS2, then into MoOx, and finally into Mo particles. This limited grain growth promoted secondary phase generation but importantly helped to reduce the grain boundary barriers. Samples prepared with additions of the precursor exhibited vastly increased electrical conductivity, without significant impact on Seebeck coefficients giving rise to high power factor values of 1760 μW/mK2 at ∼300 K and a maximum thermoelectric figure-of-merit zT of 0.24 at 823 K. This processing strategy provides a simple method to achieve high charge mobility in polycrystalline titanate and related materials and with the potential to create "phonon-glass-electron-crystal" oxide thermoelectric materials.
Collapse
Affiliation(s)
- Yibing Zhu
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Feridoon Azough
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Xiaodong Liu
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Xiangli Zhong
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Minghao Zhao
- Department
of Chemistry, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Kalliope Margaronis
- Department
of Materials Science & Metallurgy, University
of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, U.K.
| | - Sohini Kar-Narayan
- Department
of Materials Science & Metallurgy, University
of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, U.K.
| | - Ian Kinloch
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
- Henry
Royce Institute and National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| | - Robert Freer
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
| |
Collapse
|
3
|
Chatterjee A, Banik A, El Sachat A, Caicedo Roque JM, Padilla-Pantoja J, Sotomayor Torres CM, Biswas K, Santiso J, Chavez-Angel E. Enhanced Thermoelectric Properties of Misfit Bi 2Sr 2-xCa xCo 2O y: Isovalent Substitutions and Selective Phonon Scattering. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1413. [PMID: 36837043 PMCID: PMC9959144 DOI: 10.3390/ma16041413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Layered Bi-misfit cobaltates, such as Bi2Sr2Co2Oy, are the natural superlattice of an electrically insulating rocksalt (RS) type Bi2Sr2O4 layer and electrically conducting CoO2 layer, stacked along the crystallographic c-axis. RS and CoO2 layers are related through charge compensation reactions (or charge transfer). Therefore, thermoelectric transport properties are affected when doping or substitution is carried out in the RS layer. In this work, we have shown improved thermoelectric properties of spark plasma sintered Bi2Sr2-xCaxCo2Oy alloys (x = 0, 0.3 and 0.5). The substitution of Ca atoms affects the thermal properties by introducing point-defect phonon scattering, while the electronic conductivity and thermopower remain unaltered.
Collapse
Affiliation(s)
- Arindom Chatterjee
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus Universitat Autonoma de Barcelona (UAB), Bellaterra, 08193 Barcelona, Spain
| | - Ananya Banik
- New Chemistry Unit, School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore 06484, India
| | - Alexandros El Sachat
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus Universitat Autonoma de Barcelona (UAB), Bellaterra, 08193 Barcelona, Spain
| | - José Manuel Caicedo Roque
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus Universitat Autonoma de Barcelona (UAB), Bellaterra, 08193 Barcelona, Spain
| | - Jessica Padilla-Pantoja
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus Universitat Autonoma de Barcelona (UAB), Bellaterra, 08193 Barcelona, Spain
| | - Clivia M. Sotomayor Torres
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus Universitat Autonoma de Barcelona (UAB), Bellaterra, 08193 Barcelona, Spain
- ICREA—Catalan Institute for Research and Advanced Studies, 08010 Barcelona, Spain
| | - Kanishka Biswas
- New Chemistry Unit, School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore 06484, India
| | - José Santiso
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus Universitat Autonoma de Barcelona (UAB), Bellaterra, 08193 Barcelona, Spain
| | - Emigdio Chavez-Angel
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus Universitat Autonoma de Barcelona (UAB), Bellaterra, 08193 Barcelona, Spain
| |
Collapse
|
4
|
Zhang Z, Qian P, Yang X, Wu B, Cai HL, Zhang FM, Wu XS. Manipulating the carrier concentration and phase transition via Nb content in SrTiO 3. Sci Rep 2022; 12:2499. [PMID: 35169173 PMCID: PMC8847566 DOI: 10.1038/s41598-021-03199-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 10/28/2021] [Indexed: 11/24/2022] Open
Abstract
SrTiO3 is a model of the perovskite-like compounds for structural transition which inducing the intriguing physical properties around the critical phase transition temperature TAFD (antiferrodistortive, abbrev. as AFD). Here we report that the electrical transport behavior is a new way to quantify Nb concentration for Nb-doped SrTiO3. The lattice parameter (c), phase transition temperature (TAFD), and the carrier concentration (n) of SrTiO3 may be manipulated by niobium doping. TAFD increases with increasing the niobium content in a rate of about 30 K per (wt%, i.e. niobium element's weight verses total weight) niobium and n in a rate of about 2.5 [Formula: see text] 1020/cm3 per (wt%) niobium.
Collapse
Affiliation(s)
- Zhe Zhang
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Peihua Qian
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Xingming Yang
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Baixi Wu
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - H L Cai
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - F M Zhang
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - X S Wu
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China.
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China.
| |
Collapse
|
5
|
Chatterjee A, Lan Z, Christensen DV, Bauitti F, Morata A, Chavez-Angel E, Sanna S, Castelli IE, Chen Y, Tarancon A, Pryds N. On the thermoelectric properties of Nb-doped SrTiO 3 epitaxial thin films. Phys Chem Chem Phys 2022; 24:3741-3748. [PMID: 35080541 DOI: 10.1039/d1cp03679c] [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
The exploration for thermoelectric thin films of complex oxides such as SrTiO3-based oxides is driven by the need for miniaturized harvesting devices for powering the Internet of Things (IoT). However, there is still not a clear consensus in the literature for the underlying influence of film thickness on thermoelectric properties. Here, we report the fabrication of epitaxial thin films of 6% Nb-doped SrTiO3 on (001) (LaAlO3)0.3(Sr2AlTaO6)0.7 (LSAT) single crystal using pulsed laser deposition (PLD) where the film thickness was varied from 2 nm to 68 nm. The thickness dependence shows a subtle increase of tetragonality of the thin film lattice and a gradual drop of the electrical conductivity, the density of charge carriers, and the thermoelectric Seebeck coefficient as the film thickness decreases. DFT-based calculations show that ∼2.8% increase in tetragonality results in an increased splitting between t2g and eg orbitals to ∼42.3 meV. However, experimentally observed tetragonality for films between 68 to 13 nm is only 0.06%. Hence, the effect of thickness on tetragonality is neglected. We have discussed the decrease of conductivity and the Seebeck coefficient based on the decrease of carriers and change in the scattering mechanism, respectively.
Collapse
Affiliation(s)
- Arindom Chatterjee
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark.
| | - Zhenyun Lan
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark.
| | | | - Federico Bauitti
- Catalonia Institute for Energy Research (IREC), Jardins de Les Dones de Negre 1, 08930 Sant Adrià Besos, Barcelona, Spain
| | - Alex Morata
- Catalonia Institute for Energy Research (IREC), Jardins de Les Dones de Negre 1, 08930 Sant Adrià Besos, Barcelona, Spain
| | - Emigdio Chavez-Angel
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), and Barcelona Institute of Science and Technology (BIST), Bellaterra-08193, Spain
| | - Simone Sanna
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark. .,Università degli Studi di Roma Tor Vergata and CNR-SPIN Rome, Department of Civil Engineering and Computer Science, Università di Roma Tor Vergata Dipartimento di Ingegneria Civile e Ingegneria Informatica DICII, Via del Politecnico-1, I - 00133, Roma, Italy
| | - Ivano E Castelli
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark.
| | - Yunzhong Chen
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark.
| | - Albert Tarancon
- Catalonia Institute for Energy Research (IREC), Jardins de Les Dones de Negre 1, 08930 Sant Adrià Besos, Barcelona, Spain.,ICREA, 23 Passeig Lluís Companys, Barcelona 08010, Spain
| | - Nini Pryds
- Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs Lyngby, Denmark.
| |
Collapse
|