Journal ArticleDOI
A new class of doped nanobulk high-figure-of-merit thermoelectrics by scalable bottom-up assembly
Rutvik J. Mehta,Yanliang Zhang,Chinnathambi Karthik,Binay Singh,Richard W. Siegel,Theodorian Borca-Tasciuc,Ganpati Ramanath +6 more
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TLDR
A new class of both p- and n-type bulk nanomaterials with room-temperature ZT as high as 1.1 is demonstrated using a combination of sub-atomic-per-cent doping and nanostructuring to address the challenge of obtaining thermoelectric materials with high figure of merit ZT in thin films.Abstract:
In the quest for more efficient thermoelectrics, a common strategy has been to introduce nanostructures in bulk crystals, thus reducing the thermal conductivity without affecting the electrical transport properties. A route is now presented in which the aggregation of nanoplatelets creates nanostructured materials that have higher thermoelectric efficiencies than their bulk counterparts.read more
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Nanostructured metal chalcogenides: synthesis, modification, and applications in energy conversion and storage devices
TL;DR: This review aims to provide a summary on the liquid-phase synthesis, modifications, and energy-related applications of nanostructured metal chalcogenide (MC) materials and remarks on the challenges and perspectives for future MC research are proposed.
Journal ArticleDOI
Microwave-assisted preparation of inorganic nanostructures in liquid phase.
Ying-Jie Zhu,Feng Chen +1 more
Journal ArticleDOI
Compound Copper Chalcogenide Nanocrystals
TL;DR: This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility.
Journal ArticleDOI
Point Defect Engineering of High-Performance Bismuth-Telluride-Based Thermoelectric Materials
TL;DR: In this article, an atomic scale point defect engineering is introduced as a new strategy to simultaneously optimize the electrical properties and lattice thermal conductivity of thermoelectric materials, and (Bi,Sb)2(Te,Se)3 solid solutions are selected as a paradigm to demonstrate the applicability of this new approach.
Journal ArticleDOI
Broadband phonon mean free path contributions to thermal conductivity measured using frequency domain thermoreflectance.
Keith T. Regner,Daniel P. Sellan,Zonghui Su,Cristina H. Amon,Cristina H. Amon,Alan J. H. McGaughey,Jonathan A. Malen +6 more
TL;DR: A breakdown in diffusive phonon transport generated by high-frequency surface temperature modulation is used to identify the mean free path-dependent contributions of phonons to thermal conductivity in crystalline and amorphous silicon.
References
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Journal ArticleDOI
Thin-film thermoelectric devices with high room-temperature figures of merit
TL;DR: Th thin-film thermoelectric materials are reported that demonstrate a significant enhancement in ZT at 300 K, compared to state-of-the-art bulk Bi2Te3 alloys, and the combination of performance, power density and speed achieved in these materials will lead to diverse technological applications.
Journal ArticleDOI
High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys
Bed Poudel,Qing Hao,Yi Ma,Yucheng Lan,Austin J. Minnich,Bo Yu,Xiao Yan,Dezhi Wang,Andrew Muto,Daryoosh Vashaee,Xiaoyuan Chen,Jun-Ming Liu,Mildred S. Dresselhaus,Gang Chen,Zhifeng Ren +14 more
TL;DR: Electrical transport measurements, coupled with microstructure studies and modeling, show that the ZT improvement is the result of low thermal conductivity caused by the increased phonon scattering by grain boundaries and defects, which makes these materials useful for cooling and power generation.
Journal Article
High Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys.
Bed Poudel,Qing Hao,Yi Ma,Austin J. Minnich,Andrew Muto,Yucheng Lan,Bo Yu,Xiao Yan,Dezhi Wang,Daryoosh Vashaee,X.Y. Chen,Dresselhaus,Gang Chen,Zhifeng Ren +13 more
BookDOI
CRC Handbook of Thermoelectrics
TL;DR: In this article, Rowe et al. proposed a method for reducing the thermal conductivity of a thermoelectric generator by reducing the carrier concentration of the generator, which was shown to improve the generator's performance.
Journal ArticleDOI
New Directions for Low-Dimensional Thermoelectric Materials**
Mildred S. Dresselhaus,Gang Chen,Ming Y. Tang,Ronggui Yang,Hohyun Lee,Dezhi Wang,Zhifeng Ren,Jean-Pierre Fleurial,Pawan Gogna +8 more
TL;DR: In this article, the ability to achieve a simultaneous increase in the power factor and a decrease in the thermal conductivity of the same nanocomposite sample and for transport in the same direction is discussed.