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- Title
Enhanced thermoelectric performance of Cu<sub>2</sub>SnSe<sub>3</sub> via synergistic effects of Cd-doping and CuGaTe<sub>2</sub> alloying.
- Authors
Fan, Yi-Jing; Peng, Kun-Ling; Huang, Yu-Ling; Liao, Hui-Jun; Huang, Zheng-Yong; Li, Jian; Yan, Yan-Ci; Gu, Hao-Shuang; Zhang, Bin; Hu, Yong-Ming; Lu, Xu; Zhou, Xiao-Yuan
- Abstract
In this work, we show significantly enhanced thermoelectric performance in Cu2SnSe3 via a synergistic effect of Cd-doping and CuGaTe2 alloying in the temperature range of 300–823 K. Both the electron and phonon transport properties can be simultaneously regulated by Cd doping at Sn site, leading to a higher quality factor. Meanwhile, a maximum figure of merit (zT) value of ~ 0.68 was obtained for Cu2Sn0.93Cd0.07Se3 sample at 823 K, which is about four times higher than that of the pristine sample (zT = 0.18 at 773 K). Furthermore, Cu2Sn0.93Cd0.07Se3 was alloyed with CuGaTe2 to reduce the lattice thermal conductivity in the high-temperature region. Consequently, a further enhanced zT value (0.77, 823 K) was achieved in the (Cu2Sn0.93Cd0.07Se3)0.94(CuGaTe2)0.06 sample, with a high average zT (zTave) value of 0.30 between 300 and 823 K. These results demonstrate that Cd-doping combined with CuGaTe2 alloying could be an effective method to enhance zT values of Cu2SnSe3 based compounds.
- Publication
Rare Metals, 2022, Vol 41, Issue 10, p3466
- ISSN
1001-0521
- Publication type
Article
- DOI
10.1007/s12598-022-02043-9