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Doping and temperature dependence of thermoelectric properties of AgGaTe2: First principles investigations

by: Wentao Wu, Kechen Wu, Zuju Ma, Rongjian Sa
Chemical Physics Letters, Vol. 537 (June 2012), pp. 62-64, doi:10.1016/j.cplett.2012.04.025  Key: citeulike:10685911

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Abstract

The thermoelectric properties of p-type doped AgGaTe2 with chalcopyrite structure have been investigated within DFT theoretical framework. The electrical transportations of AgGaTe2 strongly depend on the doping level as well as the temperature. The Seebeck coefficients at various temperatures corresponding to the optimal doping level are all about 270 Î¼V/K. Thus the optimal doped AgGaTe2 could be obtained by adjusting the Seebeck coefficient to 270 Î¼V/K in the future experiment. The figure of merit of AgGaTe2 at 900 K reaches 1.19 under optimal doping level indicating AgGaTe2 is a very promising thermoelectric material. ⺠Electrical transportations of AgGaTe2 strongly depend on the doping level and temperature. ⺠Optimal doped level of AgGaTe2 can be obtained by adjusting the Seebeck coefficient to 270 Î¼V/K. ⺠Figure of merit of AgGaTe2 at 900 K reaches 1.19 under optimal doping level. ⺠By doping and temperature tuning AgGaTe2 is a very promising thermoelectric material.


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