Journal ArticleDOI
Demonstration of electron filtering to increase the Seebeck coefficient in In 0.53 Ga 0.47 As ∕ In 0.53 Ga 0.28 Al 0.19 As superlattices
Joshua M. O. Zide,Daryoosh Vashaee,Zhixi Bian,Gehong Zeng,John E. Bowers,Ali Shakouri,Arthur C. Gossard +6 more
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In this paper, the authors explore electron filtering as a technique to increase the Seebeck coefficient and the thermoelectric power factor of heterostructured materials over that of the bulk.Abstract:
In this paper, we explore electron filtering as a technique to increase the Seebeck coefficient and the thermoelectric power factor of heterostructured materials over that of the bulk We present a theoretical model in which the Seebeck coefficient and the power factor can be increased in an ${\mathrm{In}}_{053}{\mathrm{Ga}}_{047}\mathrm{As}$-based composite material Experimental measurements of the cross-plane Seebeck coefficient are presented and confirm the importance of the electron filtering technique to decouple the electrical conductivity and Seebeck coefficient to increase the thermoelectric power factorread more
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Journal ArticleDOI
In2O3-Based Thermoelectric Materials: The State of the Art and the Role of Surface State in the Improvement of the Efficiency of Thermoelectric Conversion
TL;DR: In this paper, a specific surface state at the intergrain boundary, optimal for maximizing the filtering effect, can be achieved through engineering of grain boundary parameters, controlling the composition of the surrounding atmosphere, and selecting the appropriate operating temperature.
Journal ArticleDOI
Effects of impurities on the lattice dynamics of nanocrystalline silicon for thermoelectric application
Tania Claudio,Gabi Schierning,Ralf Theissmann,Hartmut Wiggers,Helmut Schober,Michael Marek Koza,Raphaël P. Hermann +6 more
TL;DR: In this article, Doped silicon nanoparticles were exposed to air and sintered to form nanocrystalline silicon and the composition, microstructure, and structural defects were investigated with TEM, XRD, and PDF and the lattice dynamics was evaluated with measurements of the heat capacity, of the elastic constants with resonant ultrasound spectroscopy and of the density of phonon states (DPS) with inelastic neutron scattering.
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Improved Thermoelectric Properties of Re-Substituted Higher Manganese Silicides by Inducing Phonon Scattering and an Energy-Filtering Effect at Grain Boundary Interfaces
Swapnil Ghodke,Akio Yamamoto,Hsuan-Chun Hu,Shunsuke Nishino,Takuya Matsunaga,Dogyun Byeon,Hiroshi Ikuta,Tsunehiro Takeuchi +7 more
TL;DR: The nano-structuring and heavy element substitution were also employed to greatly scatter the phonon conduction and as a result, the enhancement of power factor was observed in the diffused nanostructure of annealed ribbon samples and the enhancement was correlated to the formation of Schottky barriers at the grain boundary interface.
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Thermoelectric properties of epitaxial TbAs:InGaAs nanocomposites
Laura E. Clinger,Gilles Pernot,Trevor E. Buehl,Peter Burke,Arthur C. Gossard,Chris Palmstrom,Ali Shakouri,Joshua M. O. Zide +7 more
TL;DR: In this paper, the room temperature thermoelectric properties were measured as a function of TbAs concentration, revealing a maximum temperature power factor of 2.38 W/mK2 and ZT of 0.19.
Journal ArticleDOI
Enhanced power factor within graphene hybridized carbon aerogels
TL;DR: In this article, the electrical conductivity and Seebeck coefficient were simultaneously enhanced in graphene hybridized carbon aerogels (GHCAs), which can enable the development of ultra-lightweight energy-conversion materials with thermal insulation capability.