Title :
Enhancement of Thermoelectric Figure of Merit in Ternary Silver Thallium Tellurides by Controlling the Carrier Concentration
Author :
Kurosaki, Ken ; Goto, Keita ; Muta, Hiroaki ; Yamanaka, Shinsuke
Author_Institution :
Div. of Sustainable Energy & Environ. Eng., Osaka Univ.
Abstract :
We tried to improve the thermoelectric figure of merit of a ternary silver thallium telluride, Ag9TlTe5, by controlling the carrier concentration. We studied the effect of deviation from the stoichiometric composition by measuring the thermoelectric properties from room temperature to slightly below the melting temperature of polycrystalline Ag9TlTe5 with different nominal compositions. A minimal compositional deviation of Ag9TlTe5 improved the power factor while the thermal conductivity remained extremely low, leading to an enhancement of the thermoelectric figure of merit
Keywords :
Seebeck effect; carrier density; electrical resistivity; silver compounds; stoichiometry; thallium compounds; thermal conductivity; Ag9TlTe5; carrier concentration; compositional deviation; melting temperature; polycrystalline material; power factor; silver thallium telluride; stoichiometric composition; thermal conductivity; thermoelectric figure of merit; thermoelectric property; Conducting materials; Electric variables measurement; Power measurement; Reactive power; Silver; Tellurium; Temperature; Thermal conductivity; Thermal factors; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 2006. ICT '06. 25th International Conference on
Conference_Location :
Vienna
Print_ISBN :
1-4244-0811-3
Electronic_ISBN :
1094-2734
DOI :
10.1109/ICT.2006.331327
