Role of excess tellurium on the electrical and thermal properties in Te-doped paracostibite
Role of excess tellurium on the electrical and thermal properties in Te-doped paracostibite
复制标题
DOI：
10.1039/c9tc04840e
复制
发表时间：
2020-02-07
影响因子：
6.4
通讯作者：
Mori, T.
中科院分区：
文献类型：
--
作者：
Guelou, G.;Failamani, F.;Mori, T.
The effect of excess Te in the preparation of synthetic mineral paracostibite, CoSbS, was investigated in an attempt to produce a nano-micro-porous architecture. While the latter was found to have no significant impact, we demonstrate that such strategy is a successful approach to enhance both electrical and thermal property via the formation of a more Te-rich paracostibite phase compared with conventional substitution. Tuning of the electrical properties led to a large power factor of 2150 mu W m(-1) K-2 at 765 K while the lattice thermal conductivity was reduced by ca. 45%, mainly due to an increased electron-phonon scattering. Ultimately, a maximum ZT of 0.45 was achieved, representing a 100% improvement over conventional Te-doped paracostibite.
