Du Xueli, Shi Rongna, Guo Ying, Wang Yuelong, Ma Yongchang, Yuan Zhihao
School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China.
Dalton Trans. 2017 Feb 14;46(7):2129-2136. doi: 10.1039/c6dt04177a.
As a cheap substitute for PbTe or PbSe, the thermoelectric performance of PbS still remains to be improved. In this report, we selected BiS as a donor and employed a facile route of hydrothermal synthesis combined with microwave sintering to fabricate BiS doped PbS. Due to the increased electrical conductivity by BiS doping and the decreased thermal conductivity from the refined microstructure, the thermoelectric figure of merit ZT of microwave sintered PbBiS and PbBiS reached 0.90 and 0.86 at 800 K, respectively, without sign of saturation. When processed with plasma activated sintering (PAS), the highest ZT value of PbBiS only reached 0.3 at 800 K. The obtained results indicate that hydrothermal synthesis and microwave sintering can essentially improve the thermoelectric properties of PbBiS and easily realize mass production at low cost.
作为碲化铅或硒化铅的廉价替代品，硫化铅的热电性能仍有待提高。在本报告中，我们选择铋硫作为施主，并采用水热合成与微波烧结相结合的简便方法来制备铋硫掺杂的硫化铅。由于铋硫掺杂提高了电导率，以及细化的微观结构降低了热导率，微波烧结的PbBiS和PbBiS的热电优值ZT在800 K时分别达到0.90和0.86，且无饱和迹象。当采用等离子体活化烧结（PAS）处理时，PbBiS在800 K时的最高ZT值仅达到0.3。所得结果表明，水热合成和微波烧结能够从本质上改善PbBiS的热电性能，并易于以低成本实现大规模生产。
