Thermoelectric properties of Sm-doped BiCuSeO oxyselenides fabricated by two-step reactive sintering

Novitskii, Andrei; Serhiienko, Illia; Новиков, С. В.; Kuskov, Kirill; Pankratova, Daria; Свиридова, Т. А.; Воронин, А. И.; Bogach, A. V.; Скрылева, Е. А.; Parkhomenko, Yuriy; Бурков, А. Т.; Mori, Takao; Khovaylo, Vladimir

doi:10.1016/j.jallcom.2022.165208

Cited by 10 publications

(4 citation statements)

References 67 publications

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“…The above expression states that thermal conductivity has a significant reduction with the increase in n at due to more scattering effects. The heavy constituting elements having a weak interatomic bonding originated the detrimental effects in thermal conductivity of Bi 1−x Sm x CuSeO (0 ⩽ x ⩽ 0.08) [61]. The entropy plays a crucial role in affecting the transport parameters of a system.…”

Section: Number Of Atoms (Alloy Scatteringmentioning

confidence: 99%

Physics and technology of thermoelectric materials and devices

Dadhich

Saminathan

Kumari

et al. 2023

J. Phys. D: Appl. Phys.

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The continuous depletion of fossil fuels and the increasing demand for eco-friendly and sustainable energy sources have prompted researchers to look for alternative energy sources. The loss of thermal energy in heat engines (100-350 ºC), coal-based thermal plants (150-700 ºC), heated water pumping in the geothermal process (150-700 ºC), and burning of petrol in the automobiles (150-250 ºC) in form of untapped waste-heat can be directly and/or reversibly converted into usable electricity by means of charge carriers (electrons or holes) as moving fluids using thermoelectric (TE) technology, which works based on typical Seebeck effect. The enhancement in TE conversion efficiency has been a key challenge because of the coupled relation between thermal and electrical transport of charge carriers in a given material. In this review, we have deliberated the physical concepts governing the materials to device performance as well as key challenges for enhancing the TE performance. Moreover, the role of crystal structure in the form of chemical bonding, crystal symmetry, order-disorder and phase transition on charge carrier transport in the material has been explored. Further, this review has also emphasized some insights on various approaches employed recently to improve the TE performance, such as, (i). carrier engineering via band engineering, low dimensional effects, and energy filtering effects and (ii). Phonon engineering via doping/alloying, nano-structuring, embedding secondary phases in the matrix and microstructural engineering. Wehave also briefed the importance of magnetic elements on thermoelectric properties of the selected materials and spin Seebeck effect. Furthermore, the design and fabrication of TE modules and their major challenges are also discussed. As, thermoelectric figure of merit, zT does not have any theoretical limitation, an ideal high performance thermoelectric device should consist of low-cost, eco-friendly, efficient, n- or p-type materials that operate at wide- temperature range and similar coefficients of thermal expansion, suitable contact materials, less electrical/ thermal losses and constant source of thermal energy. Overall, this review provides the recent physical concepts adopted and fabrication procedures of TE materials and device so as to improve the fundamental understanding and to develop a promising TE device.

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Section: Number Of Atoms (Alloy Scatteringmentioning

confidence: 99%

Physics and technology of thermoelectric materials and devices

Dadhich

Saminathan

Kumari

et al. 2023

J. Phys. D: Appl. Phys.

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“…[28][29][30][31][32][33] This enables them to harness and reuse energy from various sources, such as automotive exhaust, industrial waste heat, and geothermal resources. [34][35][36][37][38][39][40] The conversion potential of these materials opens new possibilities for achieving sustainable energy development. Besides their energy conversion advantages, thermoelectric materials also offer other unique benefits.…”

Section: Introductionmentioning

confidence: 99%

Ultralow thermal conductivity and high thermoelectric performance induced by multiscale lattice defects in Cu-doped BST alloys

Liu,

Tang,

Tao

et al. 2024

CrystEngComm

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“…Thermoelectric-based technology has inherent and promising potential to resolve the present environmental issues and energy crisis since it converts wasted heat energy into electricity, and vice versa [1][2][3]. This technology offers sustainable and clean solutions for the energy crisis, with the application domain cutting across solid-state refrigeration and the harvesting of wasted heat [4].…”

Section: Introductionmentioning

confidence: 99%

Modeling Temperature-Dependent Thermoelectric Performance of Magnesium-Based Compounds for Energy Conversion Efficiency Enhancement Using Intelligent Computational Methods

Ibn Shamsah

2024

Inorganics

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Eco-friendly magnesium-based thermoelectric materials have recently attracted significant attention in green refrigeration technology and wasted heat recovery applications due to their cost effectiveness, non-toxicity, and earth abundance. The energy conversion efficiency of these thermoelectric materials is controlled by a dimensionless thermoelectric figure of merit (TFM), which depends on thermal and electrical conductivity. The independent tuning of the electrical and thermal properties of these materials for TFM enhancement is challenging. The improvement in the TFM of magnesium thermoelectric materials through scattering and structural engineering is experimentally challenging, especially if multiple elements are to be incorporated at different concentrations and at different doping sites. This work models the TFM of magnesium-based thermoelectric materials with the aid of single-hidden-layer extreme learning machine (ELM) and hybrid genetic-algorithm-based support vector regression (GSVR) algorithms using operating absolute temperature, elemental ionic radii, and elemental concentration as descriptors. The developed TFM-G-GSVR model (with a Gaussian mapping function) outperforms the TFM-S-ELM model (with a sine activation function) using magnesium-based thermoelectric testing samples with improvements of 17.06%, 72%, and 73.03% based on correlation coefficient (CC), root mean square error (RMSE), and mean absolute error (MAE) assessment metrics, respectively. The developed TFM-P-GSVR (with a polynomial mapping function) also outperforms TFM-S-ELM during the testing stage, with improvements of 14.59%, 55.31%, and 62.86% using CC, RMSE, and MAE assessment metrics, respectively. Also, the developed TFM-G-ELM model (with a sigmoid activation function) shows superiority over the TFM-S-ELM model with improvements of 14.69%, 79.52%, and 83.82% for CC, RMSE, and MAE assessment yardsticks, respectively. The dependence of some selected magnesium-based thermoelectric materials on temperature and dopant concentration on TFM was investigated using the developed model, and the predicted patterns align excellently with the reported values. This unique performance demonstrated that the developed intelligent models can strengthen room-temperature magnesium-based thermoelectric materials for industrial and technological applications in addressing the global energy crisis.

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Thermoelectric properties of Sm-doped BiCuSeO oxyselenides fabricated by two-step reactive sintering

Cited by 10 publications

References 67 publications

Physics and technology of thermoelectric materials and devices

Physics and technology of thermoelectric materials and devices

Ultralow thermal conductivity and high thermoelectric performance induced by multiscale lattice defects in Cu-doped BST alloys

Modeling Temperature-Dependent Thermoelectric Performance of Magnesium-Based Compounds for Energy Conversion Efficiency Enhancement Using Intelligent Computational Methods

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