Journal ArticleDOI
Effect of oxidation on the thermoelectric properties of PbTe and PbS epitaxial films
E.I. Rogacheva,I. M. Krivulkin,O. N. Nashchekina,A. Yu. Sipatov,Valentine V. Volobuev,M. S. Dresselhaus +5 more
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TLDR
In this paper, the authors report on the thickness d dependences of the Seebeck coefficient, electrical conductivity, and Hall coefficient of PbTe and PbS epitaxial thin films (d=5-200nm), prepared by thermal evaporation in vacuum and deposition on (001) KCl substrates.Abstract:
We report on the thickness d dependences of the Seebeck coefficient, electrical conductivity, and Hall coefficient of PbTe and PbS epitaxial thin films (d=5–200 nm), prepared by thermal evaporation in vacuum and deposition on (001) KCl substrates. The oxidation of the films in air at 300 K leads to a sign inversion of the carrier type from n to p in films with d⩽125 and 110 nm for PbTe and PbS, respectively. The observed d dependences are interpreted in terms of compensating acceptor states created by oxygen on the film surface.read more
Citations
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Journal ArticleDOI
PbTe nanocomposites synthesized from PbTe nanocrystals
TL;DR: In this article, dense lead telluride (PbTe) nanocomposites were prepared from PbTe nanocrystals synthesized employing an aqueous solution-phase reaction.
Journal ArticleDOI
Assembly of one-dimensional nanorods into Bi2S3 films with enhanced thermoelectric transport properties
TL;DR: In this paper, Bismuth sulfide thin films have been assembled by cross-linkage nanorods on surface-functionalized Si substrate with self-assembled monolayers.
Journal ArticleDOI
Embedded Ag-rich nanodots in PbTe: Enhancement of thermoelectric properties through energy filtering of the carriers
TL;DR: The concept of energy filtering of the carriers to control the thermoelectric properties of PbTe is experimentally applied in this paper, where the energy barriers at the grain interfaces of the nanocomposites and the embedded Ag-rich nanodots within the grains are supposed to control energy dependency of carrier scattering.
Journal ArticleDOI
Synthesis of PbTe nanowire arrays using lithographically patterned nanowire electrodeposition
Yongan Yang,Sheng-Chin Kung,David K. Taggart,Chengxiang Xiang,Fan Yang,Matthew A. Brown,Aleix G. Güell,T J Kruse,John C. Hemminger,Reginald M. Penner +9 more
TL;DR: XPS reveals that exposure of PbTe nanowires to air causes the formation on the nanowire surface of approximately one monolayer of a mixed lead oxide and tellurium oxide within a few minutes.
Journal ArticleDOI
Bottom-up processing of thermoelectric nanocomposites from colloidal nanocrystal building blocks: the case of Ag2Te–PbTe
Doris Cadavid,Maria Ibáñez,Stéphane Gorsse,Antonio M. López,Albert Cirera,Joan Ramon Morante,Andreu Cabot +6 more
TL;DR: In this article, a bottom-up approach to produce nanocomposites with homogeneous phase distributions and adjustable composition is demonstrated by blending Ag2Te and PbTe colloidal nanocrystals.
References
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Journal ArticleDOI
Effect of quantum-well structures on the thermoelectric figure of merit.
TL;DR: In this article, the authors proposed to use quantum-well superlattice structures to enhance the performance of thermoelectric coolers and showed that layering has the potential to increase significantly the figure of merit of a highly anisotropic material.
BookDOI
Semiconducting lead chalcogenides
TL;DR: The last decade has seen radical changes in our understand- ing of the physical properties of semiconductors as mentioned in this paper, and the visible evidence of the pro- gress is in the form of hundreds of publications, some of which re- port extremely refined and comprehensive investigations of semi-conducting materials.
Journal ArticleDOI
Experimental study of the effect of quantum-well structures on the thermoelectric figure of merit
TL;DR: In this article, it has been shown theoretically that it may be possible to increase the thermoelectric figure of merit (Z$) of certain materials by preparing them in the form of two-dimensional quantum-well structures.
Journal ArticleDOI
High thermoelectric figures of merit in PbTe quantum wells
TL;DR: In this paper, high quality Pb1−xEuxTe/PbTe multiple quantum wells (MQWs) have been grown by molecular beam epitaxy and the measured 300K thermoelectric properties have been compared with that of the best bulk PbTe.
Journal ArticleDOI
PbTe/Te superlattice structures with enhanced thermoelectric figures of merit
TL;DR: The thermoelectric properties of PbTe/Te superlattice structures grown by molecular beam epitaxy have been investigated in this paper, where the in-plane Seebeck coefficient, Hall coefficient, and electrical resistivity have been measured at 300K.