p-n Control of AlMgB14-Based Thermoelectric Materials by Metal Site Occupancy

Fujima, Takuya; Shimizu, Natsuki; Arimatsu, Hideki

doi:10.3390/ma12040632

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…[ 64 ] An interesting feature of AlMgB 14 is that although σ and S are in between those of β‐rhombohedral boron and boron carbides, its PF is the lowest. [ 141 ] Since YB 14 have the same crystal structure as AlMgB 14 , different techniques were applied to change the conduction behavior of YB 14 to create n‐type semiconductors. Because of the lower absolute values of the Seebeck coefficient and high thermal conductivities, the zT of the n‐type counterpart is lowered than that of the p‐type.…”

Section: Families Of Known Boridesmentioning

confidence: 99%

Thermoelectric Borides: Review and Future Perspectives

Saglik

Mete

Terzi

et al. 2023

Advanced Physics Research

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The conversion of waste heat into electricity plays a vital role in energy harvesting since conventional non‐renewable energy sources have been rapidly approaching the limit of utilization. The thermoelectric (TE) technology relies on converting temperature difference (or waste heat) into electricity or vice versa. The performance of TE materials is gauged by zT = S2T/ρκ, where S, ρ, κ, and T represent the Seebeck coefficient, the electrical resistivity, the total thermal conductivity, and the absolute temperature, respectively. Boron‐based compounds are considered refractory materials due to their high melting points and advanced chemical and mechanical stability. Besides high thermal stability, many borides exhibit intrinsically low thermal conductivity. The discovery of good TE efficiency in boron carbides, where unexpectedly high Seebeck coefficients (S(T) ≈ 250 µVK−1) are observed at high charge carrier densities (≈1021 cm−3), has induced an intense curiosity for the TE properties of other boron‐based compounds. Intermetallic borides with high boron content (>65 at%) are of particular interest among all known TE materials due to their great potential in TE generators, which can operate under extreme environmental conditions (T > 1000 K). This article reviews the TE properties of borides and state‐of‐art TE materials upon boron/borides doping.

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Section: Families Of Known Boridesmentioning

confidence: 99%

Thermoelectric Borides: Review and Future Perspectives

Saglik

Mete

Terzi

et al. 2023

Advanced Physics Research

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“…Clearly, the "dipole moment per unit volume" cannot be unambiguously defined and will depend on whether the chain is partitioned into the "+ -" set of dipoles or, alternatively, into the "-+" set. The standard definition is even more dubious for realistic continuous electron charge distributions which cannot be partitioned meaningfully into individual dipoles-e.g., Figure 3 in [70], Figure 2 in [71], Figure 5 in [72], Figure 5 in [73]. The textbook definition is narrowly applicable only in the case of well-defined and wellseparated dipoles.…”

Section: Electric Polarizationmentioning

confidence: 99%

Computational Electromagnetics: A Miscellany

Tsukerman

2021

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The paper presents a miscellany of unorthodox and, in some cases, paradoxical or controversial items related to computational and applied electromagnetics. The topics include a definition of the magnetic source field via a line integral, losses in electric power transmission vs. losses in photonics, homogenization of periodic electromagnetic structures, spurious modes, models of plasmonic media, and more. It is hoped that this assortment of subjects will be of interest to a broad audience of scientists and engineers.

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“…A typical thermoelectric module is composed of p-and n-type thermoelectric conversion materials. In inorganic thermoelectric conversion materials, for thermal stress relief at each junction point in the module, the creation of p-and n-type in the same material system has been investigated [6,7].…”

Section: Introductionmentioning

confidence: 99%

First-Principle Study on p-n Control of PEDOT-Based Thermoelectric Materials by PTSA Doping

et al. 2021

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PEDOT:Tos, a PSS-free PEDOT-based material, is a promising possible organic thermoelectric material for a practical conversion module because the material reportedly has a large power factor. However, since PEDOT:Tos is mainly reported to be a p-type thermoelectric material, the development of PSS-free PEDOT with n-type thermoelectric properties is desirable. Thus, in order to search for PSS-free PEDOT with n-type thermoelectric properties, we investigated the doping concentration of PTSA dependence of the thermoelectric property using the first-principle calculation. The band structure and the density of state indicated that the n-type thermal electromotive force was attributed to the electrons’ large effective mass. Such electrons were produced thanks to the binding of the dopant PTSA to the benzene ring. The contribution of the electron to the Seebeck coefficient increased with increasing PTSA doping concentrations.

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p-n Control of AlMgB14-Based Thermoelectric Materials by Metal Site Occupancy

Cited by 4 publications

References 32 publications

Thermoelectric Borides: Review and Future Perspectives

Thermoelectric Borides: Review and Future Perspectives

Computational Electromagnetics: A Miscellany

First-Principle Study on p-n Control of PEDOT-Based Thermoelectric Materials by PTSA Doping

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