Results 231 to 240 of about 20,861 (259)

Thermoelectric figure-of-merit under large temperature differences

Journal of Physics D: Applied Physics, 2004
The dimensionless thermoelectric figure-of-merit, ZT, of Bi2Te3 based alloys was investigated under a large temperature difference using a recently reported 'open/short circuit' measurement technique. It is shown that the measured ZT decreases with an increase in temperature difference.
Gao Min, D M Rowe, K Kontostavlakis
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Thermoelectric figure of merit of a hybrid material

2007 26th International Conference on Thermoelectrics, 2007
The thermoelectric figure of merit ZT of a hybrid material made of n-doped PbTe nanocrystals bridged by trans-polyacetylene molecules is investigated theoretically using the non-equilibrium Greenpsilas function approach. Shifting narrow molecular resonances above the conduction band edge of the nanocrystals by using polar surface molecules, results in ...
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Effective power factor and thermoelectric figure of merit

AIP Conference Proceedings, 2012
The work reviews and calculates effective values for the figure of merit and the power factor of a thermoelectric (TE) element which are obtained in the optimizing process of the performance parameter (power output and efficiency) of the element. Especially the difference to the classical Ioffe theory [1] is highlighted if a temperature and/or spatial ...
Zabrocki, K., Seifert, W., Müller, E.
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Thermoelectric Figure of Merit of Two-Band Semiconductors

Journal of Applied Physics, 1962
The locus of points on the (α,κ/σT) plane for a two-band (electrons and holes) semiconductor as the concentration of doping agent is changed, is a curve that forms a closed loop, where α is the Seebeck coefficient, κ the thermal conductivity, σ the electrical conductivity, and T the absolute temperature.
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Boundary Scattering and the Thermoelectric Figure of Merit

physica status solidi (a), 2001
The lattice thermal conductivity of a thermoelectric material can be significantly reduced at ordinary temperatures by boundary scattering but the beneficial effect on the figure of merit can sometimes be more than offset by boundary scattering of the charge carriers.
J.W. Sharp, S.J. Poon, H.J. Goldsmid
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Thermoelectric figure of merit calculations for semiconducting nanowires

Applied Physics Letters, 2011
A model for the thermoelectric properties of nanowires was used to demonstrate the contrasting influences of quantization and degeneracy on the thermoelectric power factor. The prevailing notion that quantum confinement benefits the thermoelectric power factor is supported by the model when a single-subband dominates transport.
Jane E. Cornett, Oded Rabin
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The Figure of Merit of a Thermoelectric Generator†

Journal of Electronics and Control, 1959
ABSTRACT Optimum conditions are deduced for a thermoelectric generator or refrigerator with n- and p-type semi-conducting branches which have different physical parameters. The results are related in a simple manner to the previously calculated optimum conditions for the individual figure of merit of a single substance.
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On anisotropic thermoelectric materials figure of merit increase

MRS Proceedings, 1991
The thermoelemernts based on the Seebeck coefficlent anisotropy in homogeneous media are known as well as classical thormoelements and thermopiles using Seebeck effact in the circuit of haterogeneous materials [1] Some our variants of such thormoelement have been patented particularly in the USA [2,3].
Lukygen I. Rnotyjchuk, Oleg J. Lusts
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The Thermoelectric Figure of Merit and its Relation to Thermoelectric Generators†

Journal of Electronics and Control, 1959
ABSTRACT The expression for the figure of merit of a semi-conductor of given carrier mobility and lattice thermal conductivity expressed in terms of generalized Fermi-Dirae functions has been numerically evaluated for various scattering indices. The results are presented graphically enabling the maximum figure of merit to be found.
R. P. CHASMAR, R. STRATTON
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Thermoelectric Conversion Efficiency and Figure of Merit

Thermoelectric (TE) materials are useful in renewable energy applications because they can transform waste heat into electricity. To accomplish large-scale thermoelectric applications, materials must have high thermoelectric conversion efficiency, be inexpensive, and operate within a specific temperature range.
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