TiO2–SrTiO3 Biphase Nanoceramics as Advanced Thermoelectric Materials

Zavjalov, A. P.; Tikhonov, Sergey A.; Kosyanov, D.Yu.

doi:10.3390/ma12182895

Cited by 13 publications

(6 citation statements)

References 172 publications

(308 reference statements)

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“…[78] But compared with those advanced thermoelectrics (e.g., Bi 2 Te 3 , SnSe), more efforts should be devoted to further improve thermoelectric performance of oxide perovskites (e.g., strategies to decrease thermal conductivity), which have been comprehensively prospected in some reviews. [79,80] For the halide perovskites, the attracting characteristics lie in their high Seebeck coefficient and excellent carrier mobility, but exploration regarding its thermoelectric behaviors has only begun recently, mainly focusing on theoretical analysis and prediction of thermoelectric performance. [81] In 2016, Mattoni et al demonstrated a theoretical calculation of thermoelectric properties of MAPbI 3 and predicted that it could deliver a ZT value of 1-3 at room temperature via electron doping strategy.…”

Section: Thermoelectric Effectmentioning

confidence: 99%

Advanced Design of Light‐Assisted Nanogenerators with Multifunctional Perovskites

Yin,

Fu,

2024

Advanced Energy Materials

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Enormous efforts are invested in developing multi‐energy harvesting technology with simple configuration and high conversion efficiency, and light‐assisted nanogenerators are considered a promising solution. Multifunctional perovskites are explored for this light‐assisted nanogenerator, owing to its powerful platform characteristics for integrating multiple energy conversion mechanisms and multi‐effects coupling phenomenon. Therefore, with the rapid progress of this emerging field, a timely and comprehensive review of this light‐assisted nanogenerator is urgently needed for updating the fundamental understanding of coupling mechanism and material‐device‐performance relationship. In this review, recent advancements of the perovskite light‐assisted nanogenerator with their advanced designs are presented. First, the fundamental properties co‐existing in perovskites are briefly introduced, as well as some emerging effects (e.g., flexoelectric). Subsequently, the further coupling mechanism between photovoltaic effect and other energy conversion effects in different light‐assisted nanogenerator are discussed in categories. And the output characteristics and potential application of various coupled devices are systematically described from the perspective of perovskites selection and device engineering. Finally, some perspectives on existing challenges and further development for light‐assisted nanogenerator are put forward, with the aim to provide useful guidance for the design of advanced devices.

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Section: Thermoelectric Effectmentioning

confidence: 99%

Advanced Design of Light‐Assisted Nanogenerators with Multifunctional Perovskites

Yin,

Fu,

2024

Advanced Energy Materials

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“…134 These superlattices remarkably reduces the κ of the materials and enhanced the ZT values. 135 First time, idea of superlattice was given by Venkatasubramanian 136 to improve the value of ZT by reducing the κ l . Further this approaches continuously explored by other researchers.…”

Section: Superlatticesmentioning

confidence: 99%

Dimensionality effects in high‐performance thermoelectric materials: Computational and experimental progress in energy harvesting applications

Singh

Ahuja

2021

WIREs Comput Mol Sci

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Thermoelectric (TE) materials can be used in the conversion of heat to electricity and vice versa, which can enhance the efficiency of the fuel, in addition to supplying solid alternative energy in several applications in accumulating waste heat and, as a result, help to find new energy sources. Considering the current environment as well as the energy crisis, the TE modules are a need of the future. The present review focuses on the new strategies and approaches to achieve high-performance TE materials including materials improvement, structures, and geometry improvement and their applications. Controlling the carrier concentration and the band structures of materials is an effective way to optimize the electrical transport properties, while engineered nanostructures and engineering defects can immensely decrease the thermal conductivity and significantly improved the power factor. The present review gives a better understanding of how the theory is affecting the TE field.

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“…Based on the simulated electronic structures, the thermoelectric transport properties of n-type BiCuOCh are calculated by the semiclassical Boltzmann theory via the BoltzTraP package [32,33]. Similar to treatments employed in literature [13], constant relaxation time approximation is used in the calculations of thermoelectric transport properties, because the scattering time of most semiconductors is insensitive to energy [34]. A Monkhost-Pack mesh of 31 × 31 × 13 k-point is used to obtain the accurate thermoelectric transport properties of BiCuOCh [35,36].…”

Section: Computational Detailsmentioning

confidence: 99%

“…Materials 2020, 13, x FOR PEER REVIEW 3 of 13 semiconductors is insensitive to energy [34]. A Monkhost-Pack mesh of 31 × 31 × 13 k-point is used to obtain the accurate thermoelectric transport properties of BiCuOCh [35,36].…”

Section: Crystal Structuresmentioning

confidence: 99%

Uniaxial Tensile Strain Induced the Enhancement of Thermoelectric Properties in n-Type BiCuOCh (Ch = Se, S): A First Principles Study

2020

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It is well known that the performance of thermoelectric measured by figure of merit ZT linearly depends on electrical conductivity, while it is quadratic related to the Seebeck coefficient, and the improvement of Seebeck coefficient may reduce electrical conductivity. As a promising thermoelectric material, BiCuOCh (Ch = Se, S) possesses intrinsically low thermal conductivity, and comparing with its p-type counterpart, n-type BiCuOCh has superior electrical conductivity. Thus, a strategy for increasing Seebeck coefficient while almost maintaining electrical conductivity for enhancing thermoelectric properties of n-type BiCuOCh is highly desired. In this work, the effects of uniaxial tensile strain on the electronic structures and thermoelectric properties of n-type BiCuOCh are examined by using first-principles calculations combined with semiclassical Boltzmann transport theory. The results indicate that the Seebeck coefficient can be enhanced under uniaxial tensile strain, and the reduction of electrical conductivity is negligible. The enhancement is attributed to the increase in the slope of total density of states and the effective mass of electron, accompanied with the conduction band near Fermi level flatter along the Γ to Z direction under strain. Comparing with the unstrained counterpart, the power factor can be improved by 54% for n-type BiCuOSe, and 74% for n-type BiCuOS under a strain of 6% at 800 K with electron concentration 3 × 10 20 cm −3 . Furthermore, the optimal carrier concentrations at different strains are determined. These insights point to an alternative strategy for superior thermoelectric properties.Newly discovered thermoelectric materials BiCuOSe and BiCuOS [BiCuOCh (Ch = Se, S)] have attracted attentions due to their intrinsically low thermal conductivity [8][9][10][11], whose conductive layers (Cu 2 Se 2 ) 2− or (Cu 2 S 2 ) 2− are alternately stacked with an insulating layer (Bi 2 O 2 ) 2+ , composing of the ZrSiCuAs structure type, and this layered structure may be an important factor affording its low thermal conductivity [12,13]. Because of the low lattice thermal conductivity, efforts to improve thermoelectric performance ZT of these compounds have mainly focused on enhancing their power factor S 2 σ. To obtain high power factor, several approaches to increase the electrical conductivity of BiCuOCh, such as doping [14,15], pressure [16], and strain [17], have been attempted. As the electrical conductivity, σ, and Seebeck coefficient, S, are coupled, improving electrical conductivity will reduce Seebeck coefficient [1]. Compared with p-type BiCuOSe, n-type BiCuOSe possesses higher electrical conductivity [16]. On the other hand, it is also noticed that the power factor, S 2 σ, depends linearly on electrical conductivity, σ, but quadratically on Seebeck coefficient S. Thus, it is an alternative pathway to achieve the enhancement of power factor for n-type BiCuOCh via enhancing Seebeck coefficient while keeping electrical conductivity with only slight reduction.Recently, band engineer...

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TiO2–SrTiO3 Biphase Nanoceramics as Advanced Thermoelectric Materials

Cited by 13 publications

References 172 publications

Advanced Design of Light‐Assisted Nanogenerators with Multifunctional Perovskites

Advanced Design of Light‐Assisted Nanogenerators with Multifunctional Perovskites

Dimensionality effects in high‐performance thermoelectric materials: Computational and experimental progress in energy harvesting applications

Uniaxial Tensile Strain Induced the Enhancement of Thermoelectric Properties in n-Type BiCuOCh (Ch = Se, S): A First Principles Study

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