期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
卷 32, 期 8, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S021797921850087X
关键词
CU2-xHgxSe; hydrothermal synthesis; hot-pressing; thermoelectric properties
资金
- Foundation of Henan Educational Committee [16A140036]
- Henan Postdoctoral Foundation
- Key Programs for Science and Technology Development of Henan Province
- Natural Science Foundation of Henan Province
The Cu2-xHgx-Se (x = 0, 0.05, 0.10 and 0.15) nanopowders were fabricated using the hydrothermal synthesis, and then hot-pressed into bulk alloys. The effects of Hg doping on the thermoelectric (TE) properties of Cu2Se were investigated. The electrical resistivities of all the doped samples are lower than that of the nondoped sample due to the induced cation vacancies. For the x = 0.10 and x = 0.15 samples, Seebeck coefficients increase slightly compared with the nondoped sample at higher temperature. Except for the sample of x = 0.05, the thermal conductivities of x = 0.10 and x = 0.15 samples are substantially lower than that of the x = 0.00 sample. As an overall result, the maximum value of ZT, which is the dimensionless TE figure of merit, reaches 1.50 at 600 degrees C for the x = 0.10 sample.
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