Thermoelectric figure-of-merit barrier at minimum lattice thermal conductivity?

Autor:	D. M. Rowe, Gao Min
Rok vydání:	2000
Předmět:	Thermoelectric figure of merit Thermal conductivity Materials science Physics and Astronomy (miscellaneous) Electrical resistivity and conductivity Thermoelectric effect Thermodynamics Power factor Constant (mathematics) Thermoelectric materials Dimensionless quantity
Zdroj:	Applied Physics Letters. 77:860-862
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1306652
Popis:	An analysis of the transport properties data on established thermoelectric materials indicates that the ratio of the electrical power factor to optimum electrical conductivity appears constant. This result, when combined with the previously proposed concept of a minimum thermal conductivity, enables realistic maximum dimensionless figures-of-merit to be calculated. It is concluded that a barrier to increasing the dimensionless figure-of-merit appears to exist which is around 2 at room temperature and that overcoming this barrier will require the development of materials with radically different transport properties from those currently available.
Databáze:	OpenAIRE
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