Effect of thickness on the thermoelectric properties of PbS thin films

Рогачева, Е. И.; Nashchekina, O. N.; Vekhov, Ye.; Dresselhaus, M. S.; Cronin, Stephen B.

doi:10.1016/s0040-6090(02)00968-9

Cited by 33 publications

(32 citation statements)

References 18 publications

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“…But it should be noticed that experimental oscillation amplitudes in ddependences of thermoelectric parameters are much more large than the theoretical one. We consider that this difference has place because of assumption of infinite barrier height, what is confirmed by the data in [14], where for Te Eu PbTe/Pb x x 1− quantum wells it was found that energy barrier height reduction leads to increase of the thermoelectric power factor SP The authors [7,8] offer to determine a theoretical oscillation period value (ΔdB theor B ) for nanostructures, based on IV-VI compounds, using a known Fermi energy εB F B of single crystals. In our opinion, for nanostructures Fermi level is largely dependent on their topology and size, which, in turn, are determined by technological factors of growth.…”

Section: Discussionsupporting

confidence: 54%

“…Naturally, we assumed that this behavior is due to size effects in quantum well formed by the potential barrier on the edge of polyamide substrate and oxidative layer on the condensate surface (similar to the results of [7][8][9][10]). …”

Section: Discussionmentioning

confidence: 65%

“…For example, in the study of thickness (d) dependences of thermoelectric parameters for PbSe in quantum well structure KCl/PbSe/EuS [7] experimental data show clearly non-monotonous, oscillation character curves, what indicates the presence of size quantization. The authors [8] examined samples of n-type KCl/PbS/EuS. The complex nature of ddependences for thermoelectric parameters has been explained by competition between size quantization and percolation phenomenon.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Size effects in p-PbTe nanostructures on polyamide

Freik¹,

Lysiuk²

2011

Semicond. Phys. Quantum Electron. Optoelectron.

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Section: Discussionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

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Size effects in p-PbTe nanostructures on polyamide

Freik¹,

Lysiuk²

2011

Semicond. Phys. Quantum Electron. Optoelectron.

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“…Earlier we reported oscillatory dependence of the transport properties on the layer thickness d in n-PbTe, n-PbSe, and n-PbS epitaxial thin films (see, for example, [17][18][19][20][21], and we attributed this oscillatory behavior to QSEs due to electron confinement in the IV-VI QWs. It is also of great interest to conduct similar studies for lead chalcogenides with p-type conductivity.…”

Section: Introductionmentioning

confidence: 67%

Oscillatory Behavior of Thermoelectric Properties in p-PbTe Quantum Wells

Рогачева

Водорез

Nashchekina

et al. 2009

Journal of Elec Materi

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The room-temperature dependences of the Seebeck coefficient, Hall coefficient, electrical conductivity, charge carrier mobility, and thermoelectric power factor were obtained as a function of thickness d (d = 8 nm to 400 nm) of PbTe epitaxial layers grown by thermal evaporation in vacuum of PbTe polycrystals doped with Na onto (100)KCl surfaces and covered with an Al 2 O 3 layer. Distinct oscillations in the d-dependences of the properties were observed and attributed to the size quantization of the energy spectra in PbTe layers. The experimental values of the oscillation period are in good agreement with the results of theoretical calculations using the effective-mass approximation and a model for a rectangular potential well with infinitely high walls. It follows from the obtained results that quantization of the energy spectrum in PbTe thin-film structures occurs not only for the electron gas but also for the hole gas.

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“…Inhomogeneous thin film consisting of conducting and nonconducting constituents has been observed to exhibit an abrupt increase in electrical conductivity within a narrow thickness range, which is explained by percolation theory by some authors. 30 A sharp growth in carrier mobility and electrical conductivity is expected during the transition from island mode to continuous thin film. A detailed work constituting the dependence of TE properties on varying thickness of the Ca 3 Co 4 O 9 ultrathin film is ongoing.…”

Section: B Te Properties Of Cco and Cb02 Thin Filmsmentioning

confidence: 99%

Thermoelectric properties of Ca₃Co₄O₉ and Ca_2.8Bi_0.2Co₄O₉ thin films in their island formation mode

et al. 2013

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Ca3Co4O9 and Ca2.8Bi 0.2Co4O9 thin films were fabricated on LaAlO3 (LAO) substrate using pulsed laser deposition technique and were studied for their thermoelectric (TE) properties in Stranski-Krastanov mode for the first time. The thin films consisted of 3D clusters/islands on a 14-nm thick 2D layer with cluster density being higher for Ca 2.8Bi0.2Co4O9 thin films. The clusters also represent areas of dislocation and therefore act as carrier scattering centers, which leads to a temperature-activated type conductivity. Seebeck coefficient as high as 136 and 163 u V/K was measured for the Ca 3Co4O9 and Ca2.8Bi 0.2Co4O9 thin films, respectively, which is among the highest reported values for this system. The 3D island formation was also found to be useful in reducing the thermal conductivity of the thin film/substrate system by increased phonon scattering. This work shows that the island formation in thin films can be utilized as a means of enhancing TE properties of a thin film system, however, a detailed work including optimization of the film thickness and cluster/inland density is required. thin films, respectively, which is among the highest reported values for this system. The 3D island formation was also found to be useful in reducing the thermal conductivity of the thin film/substrate system by increased phonon scattering. This work shows that the island formation in thin films can be utilized as a means of enhancing TE properties of a thin film system, however, a detailed work including optimization of the film thickness and cluster/inland density is required.

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Effect of thickness on the thermoelectric properties of PbS thin films

Cited by 33 publications

References 18 publications

Size effects in p-PbTe nanostructures on polyamide

Size effects in p-PbTe nanostructures on polyamide

Oscillatory Behavior of Thermoelectric Properties in p-PbTe Quantum Wells

Thermoelectric properties of Ca₃Co₄O₉ and Ca_2.8Bi_0.2Co₄O₉ thin films in their island formation mode

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Effect of thickness on the thermoelectric properties of PbS thin films

Cited by 33 publications

References 18 publications

Size effects in p-PbTe nanostructures on polyamide

Size effects in p-PbTe nanostructures on polyamide

Oscillatory Behavior of Thermoelectric Properties in p-PbTe Quantum Wells

Thermoelectric properties of Ca3Co4O9 and Ca2.8Bi0.2Co4O9 thin films in their island formation mode

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Product

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Thermoelectric properties of Ca₃Co₄O₉ and Ca_2.8Bi_0.2Co₄O₉ thin films in their island formation mode