Journal ArticleDOI
Enhanced thermoelectric performance via carrier energy filtering effect in β-Zn4Sb3 alloy bulk embedded with (Bi2Te3)0.2(Sb2Te3)0.8
Tianhua Zou,Xiaoying Qin,Di Li,B. J. Ren,Guosheng Sun,Y. C. Dou,Y. Y. Li,L. L. Li,Jian Zhang,H. X. Xin +9 more
Reads0
Chats0
TLDR
In this article, Pb-free β-Zn4Sb3-based composites incorporated with (Bi2Te3)0.2(Sb2Te-3) 0.8, the authors achieved ∼30% increase in thermoelectric power factor through an energy filtering effect caused by carrier scattering at interface barriers and ∼15% reduction in thermal conductivity due to interface scattering.Abstract:
In Pb-free β-Zn4Sb3 based composites incorporated with (Bi2Te3)0.2(Sb2Te3)0.8, we concurrently realize ∼30% increase in thermoelectric power factor through an energy filtering effect caused by carrier scattering at interface barriers, and ∼15% reduction in thermal conductivity due to interface scattering, allowing the figure of merit to reach 1.1 at 648 K in the composite system with 1 vol. % of (Bi2Te3)0.2(Sb2Te3)0.8.read more
Citations
More filters
Journal ArticleDOI
Carbon-Nanotube-Based Thermoelectric Materials and Devices.
TL;DR: Progress made toward understanding the fundamental thermoelectric properties of SWCNTs, nanotube-based composites, and thermoeLECTric devices prepared from these materials is reviewed in detail, illuminates the tremendous potential that carbon-nanotubes-based materials and composites have for producing high-performance next-generation devices for thermoelectedric-energy harvesting.
Journal ArticleDOI
Thermoelectric power factor: Enhancement mechanisms and strategies for higher performance thermoelectric materials
TL;DR: In this article, the authors discuss the ideas and strategies proposed and developed in order to improve the thermoelectric power factor and thus hopefully move us closer to the target of a ZT < 2.
Journal ArticleDOI
Stable n-type thermoelectric multilayer thin films with high power factor from carbonaceous nanofillers
Chungyeon Cho,Mario Culebras,Kevin L. Wallace,Yixuan Song,Kevin M. Holder,Jui-Hung Hsu,Choongho Yu,Jaime C. Grunlan +7 more
TL;DR: In this article, a high power factor n-type organic thermoelectric nanocomposites are assembled by alternately depositing double walled-nanotubes (DWNT), stabilized by polyethyleneimine (PEI), and graphene stabilised by polyvinylpyrrolidone (PVP), from water using the layer-by-layer assembly technique.
Journal ArticleDOI
Recent progresses on thermoelectric Zintl phases: Structures, materials and optimization
Ke-Feng Liu,Sheng-Qing Xia +1 more
TL;DR: A short review of recent progress on the Zintl-phase-based thermoelectric materials, including some newly developed series, were summarized and discussed in this article, where the ideas on the configuration and optimization of such materials were presented.
Journal ArticleDOI
Enhanced thermoelectric performance of highly oriented polycrystalline SnSe based composites incorporated with SnTe nanoinclusions
TL;DR: In this article, the authors synthesized highly oriented p-type polycrystalline composite samples f mol% SnTe/Ag 0.005 Sn 0.995 Se ( f ǫ = 0, 0.5, 1 and 1.5) and present thermoelectric performance from 300 K to 900 K.
References
More filters
Journal ArticleDOI
Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States
Joseph P. Heremans,Vladimir Jovovic,Eric S. Toberer,Ali Saramat,Ken Kurosaki,Anek Charoenphakdee,Shinsuke Yamanaka,G. Jeffrey Snyder +7 more
TL;DR: A successful implementation through the use of the thallium impurity levels in lead telluride (PbTe) is reported, which results in a doubling of zT in p-type PbTe to above 1.5 at 773 kelvin.
Journal ArticleDOI
Convergence of electronic bands for high performance bulk thermoelectrics
TL;DR: It is demonstrated that it is possible to direct the convergence of many valleys in a bulk material by tuning the doping and composition, leading to an extraordinary zT value of 1.8 at about 850 kelvin.
Journal ArticleDOI
Cubic AgPbmSbTe2+m: Bulk Thermoelectric Materials with High Figure of Merit
Kuei Fang Hsu,Sim Loo,Fu Guo,Wei Chen,Jeffrey S. Dyck,Ctirad Uher,Timothy P. Hogan,Efstathios K. Polychroniadis,Mercouri G. Kanatzidis +8 more
TL;DR: In the temperature range 600 to 900 kelvin, the AgPbmSbTe2+m material is expected to outperform all reported bulk thermoelectrics, thereby earmarking it as a material system for potential use in efficient thermoeLECTric power generation from heat sources.
Journal ArticleDOI
Disordered zinc in Zn4Sb3 with phonon-glass and electron-crystal thermoelectric properties.
TL;DR: This work shows through a comprehensive structural analysis using single-crystal X-ray and powder-synchrotron-radiation diffraction methods, that both the electronic and thermal properties of Zn4Sb3 can be understood in terms of unique structural features that have been previously overlooked.
Journal ArticleDOI
Preparation and thermoelectric properties of semiconducting Zn4Sb3
TL;DR: In this paper, hot-pressed samples of the semiconducting compound β-Zn4Sb3 were prepared and characterized by X-ray and microprobe analysis.