Ternary diamondlike semiconductors Cu2Ge1+xSe3 have been synthesized by direct-melting the constituent elements under several different synthetic conditions. The Hall effect and thermoelectric properties of Cu2Ge1+xSe3 were measured. All samples show positive Hall coefficients (RH) for the whole temperature range studied, and a positive Seebeck coefficient of 360 μV K−1 was observed at 300 K for Cu2GeSe3. Low thermal conductivities were also observed for all samples; the lowest value reaches 1.0 Wm−1 K−1 at 745 K.
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Cho et al. (2010) studied this question.
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