Electrical Properties of GeTe-based Ternary Alloys

被引：0
作者：
Yiqi Cao
Zhigang Li
Jianbo Wu
Xiaohua Huang
Shengnan Zhang
机构：
[1] Taizhou University,College of Physical and Electronic Engineering
[2] Northwest Institute for Non-ferrous Metal Research,Superconducting Materials Research Center
来源：
Journal of Wuhan University of Technology-Mater. Sci. Ed. | 2018年 / 33卷
关键词：
thermoelectric materials; melting; ternary alloy; GeTe; thermoelectric property;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Ge50-xSbxTe50 and Ge50-xBixTe50 ternary alloys were synthesized by vacuum melting at 1273 K with the starting materials of Ge, Bi, Sb, and Te. The lattice structures were analyzed based on X-ray diffraction patterns, which could all be indexed to R3m rhombic structure. Electrical properties measurements revealed that the Ge-Sb-Te ternary alloys were p-type semiconductors with high electrical conductivity of 4.5×105 S∙m-1 near room temperature. And the maximum electrical property was obtained at Ge45Sb5Te50, with the power factor of 2.49×10-3 W∙m-1K-2 at 640 K. Due to the existence of secondary phases, the electrical conductivity of Ge-Bi-Te system was lower and Seebeck coefficient was higher comparing with those of Ge-Sb-Te system.
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页码：472 / 475
页数：3
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