Thermoelectric effects in nanoscale layers of manganese silicide

Erofeeva, I. V.; Дорохин, М. В.; Lesnikov, V. P.; Kuznetsov, Yu. M.; Zdoroveyshchev, A. V.; Pitirimova, E. A.

doi:10.1134/s1063782617110112

Cited by 7 publications

(6 citation statements)

References 12 publications

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“…The measurement error of the Seebeck coefficient was ~5%. Detailed information on the Seebeck coefficient measurement can be found in [17,18,31]. The electrical resistance of the investigated thin films was also recorded by measuring the I-V characteristic with a classical two-contact circuit.…”

Section: Methodsmentioning

confidence: 99%

“…Resistance recording was carried out upon keeping the temperatures of two stages equal. More details on the technique can be found in [17,18,34]. The measurement error for resistivity was ~1%.…”

Section: Methodsmentioning

confidence: 99%

“…The Seebeck coefficient in thin films is, on the contrary, lower than that of bulk analogues. The general mechanism for the decrease in α is a decrease in carrier mobility due to greater surface states' contribution into carrier scattering [17][18][19]. However, the thermal conductivity decrease prevails the smaller α, allowing one to achieve high values of ZT > 1.…”

Section: Introductionmentioning

confidence: 99%

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PECVD Synthesis and Thermoelectric Properties of Thin Films of Lead Chalcogenides (PbTe)1−x(PbS)x

et al. 2023

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Lead-based ternary-chalcogenide thin films of the (PbTe)1−x(PbS)x system were obtained using the plasma-enhanced chemical-vapor-deposition (PECVD) technique under conditions of a nonequilibrium low-temperature argon plasma of an RF discharge (40.68 MHz) at a reduced pressure (0.01 Torr). High-purity elements were directly used as starting materials, namely Pb, S and Te. Plasma–chemical synthesis was carried out on the surface of c-sapphire and silicon substrate. The physicochemical properties of the films were studied using various analytical methods. The dependence of the Seebeck coefficient, resistivity and power factor on the structural properties and composition has been studied. The thermoelectric characteristics were found to be dependent on film composition. Upon the selection of optimal sulfur concentration, one can increase the power factor compared to single-phase PbS or PbTe films.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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PECVD Synthesis and Thermoelectric Properties of Thin Films of Lead Chalcogenides (PbTe)1−x(PbS)x

et al. 2023

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“…[3]. Despite the intensive development of multiple approaches to obtain thermoelectric materials with promising properties based on low-dimension structures (nanofilms [4,5], quantum wires [6], etc. ), highly-effective and low-cost thermoelectrics can be produced on the basis of 3D nanocrystalline structures [7,8].…”

Section: Introductionmentioning

confidence: 99%

Everal Notes on the Lattice Thermalconductivity of Fractal-Shaped Nanoparticles

Shishulin¹

2022

Eurasian phys. tech. j.

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Using the additive technologies in the production of nanoparticle-fabricated three-dimensional materials has become one of the most promising ways of obtaining effective and low-cost thermoelectric energy converters. Nanostructuring provides a route to modifying selectively the transport properties which determine the materials thermoelectric efficiency. In this paper, we have shown one more effect which consists in a significant dependence of the contribution of lattice vibrations to the thermal conductivity coefficient of a nanoparticle (its reducing is required in practice) on its morphology for nanoparticles of a pure substance. The particle morphology has been specified by the values of its effective diameter, fractal dimension and surface roughness.Using nanoparticles of pure bismuth at low temperatures as an example, we have demonstrated a notable decrease in the lattice thermal conductivity in “complicating” the particle morphology. In the final section, we have presented methods of calculating characteristics of nanoparticle ensembles, the methodology of measuring the fractal dimension experimentally also being discussed.

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“…Одним из подходов к созданию термоэлектрических материалов с высоким КПД является использование наноструктур с пониженной размерностью -наноразмерных пленок [4,5] и квантовых проволок [6]. Однако, как отмечается в [7], с точки зрения перспективы получения коммерчески доступных высокоэффективных термоэлектриков более актуальной задачей является их создание на основе объемных нанокристаллических материалов.…”

Section: Introductionunclassified

Фононная теплопроводность и фазовые равновесия в наночастицах системы Bi-Sb фрактальной формы

Шишулин¹,

Fedoseev²,

Шишулина³

2019

Журнал Технической Физики

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The thermal conductivity component associated with lattice vibrations is one of the quantities determining the thermoelectric activity of a material. We have simulated the dependences of phase composition and the phonon component of the thermal conductivity associated with it on the shape of nanoparticles of a Bi–Sb alloy with an equiatomic composition and with core–shell configuration. The shape of a particle is simulated by a coefficient corresponding to the extent of deviation of the particle shape from spherical or by its fractal dimension. It is shown that mutual solubilities of components depend on the nanoparticle shape and on the mutual arrangement of coexisting phases, and the thermodynamic equilibrium position for particles with complex morphology corresponds to the homogeneous state. Homogenization of a nanoparticle reduces the phonon component of its thermal conductivity by 70–80%.

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Thermoelectric effects in nanoscale layers of manganese silicide

Cited by 7 publications

References 12 publications

PECVD Synthesis and Thermoelectric Properties of Thin Films of Lead Chalcogenides (PbTe)1−x(PbS)x

PECVD Synthesis and Thermoelectric Properties of Thin Films of Lead Chalcogenides (PbTe)1−x(PbS)x

Everal Notes on the Lattice Thermalconductivity of Fractal-Shaped Nanoparticles

Фононная теплопроводность и фазовые равновесия в наночастицах системы Bi-Sb фрактальной формы

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