Enhanced thermopower in rock-salt SnTe-CdTe from band convergence
Enhanced thermopower in rock-salt SnTe-CdTe from band convergence
复制标题
通过能带收敛增强岩盐 SnTe-CdTe 的热电势
DOI：
10.1039/c6ra02658c
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Jiang, Jun
中科院分区：
文献类型：
--
作者：
He, Jun;Xu, Jingtao;Jiang, Jun
采用区熔法合成了SnCdxTe材料，并对其热电性能进行了研究。X射线衍射结果表明，SnTe和CdTe的晶格常数随x的增加而减小，符合岩盐结构SnTe和CdTe的Vegard定律。此外，SnCdxTe系统的室温塞贝克系数提高到>60 μ V K-1，大于由放电等离子体烧结合成的Cd掺杂的SnTe。在820 K时，SnCd_（0.12）Te的功率因数达到25 μ W·cm ~（-1）K ~（-1），可与高性能PbTe基材料相媲美。结果表明，SnCd 0.12Te在820 K时的ZT最高，接近1.03。
SnCdxTe materials were synthesized by the zone-melting method for this thermoelectric performance study. The X-ray diffraction results show that the lattice parameter decreases with increasing x, following Vegard's law of rock-salt structure SnTe and CdTe. Besides, the room temperature Seebeck coefficients of the SnCdxTe system are enhanced to >60 mu V K-1, larger than those of Cd-doped SnTe synthesized by spark plasma sintering. A large power factor of similar to 25 mu W cm(-1) K-1 is achieved in SnCd0.12Te at 820 K, which rivals those of high performance PbTe-based materials. As a result, the highest ZT of similar to 1.03 at 820 K was achieved for SnCd0.12Te.