High-Temperature Thermoelectric Properties of Cu-Substituted Bi2Sr2Co2OY Oxides
Bi2Sr2Co2-xCuxOy (x=0.0, 0.2, 0.4) samples were prepared by solid-state reaction method and the effect of Cu substitution on the high-temperature thermoelectric properties was investigated. The presence of Cu element improved the grain size and the thermoelectric properties increased owing to the simultaneous increase of conductivity and Seebeck coefficients. The optimal thermoelectric performance was obtained in x=0.2 sample and the power factor was two times as large as that in Cu-free sample at 923K.
L. M. Zhao et al., "High-Temperature Thermoelectric Properties of Cu-Substituted Bi2Sr2Co2OY Oxides", Advanced Materials Research, Vols. 228-229, pp. 656-660, 2011