KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Complex alloying effect on thermoelectric transport properties of Cu2Ge(Se1-xTex)3 | |
Wang, Ruifeng1,3; Dai, Lu1,3; Yan, Yanci1,2; Peng, Kunling1,2; Lu, Xu2; Zhou, Xiaoyuan2; Wang, Guoyu1,3
| |
| 2018 | |
| 摘要 | To enhance the thermoelectric performance of Cu2GeSe3, a series of Te-alloyed samples Cu2Ge(Se1-xTex)3 are synthesized and investigated in this work. It is found that the lattice thermal conductivity is reduced drastically for x = 0.1 sample, which may be attributed to the point defects introduced by alloying. However, for samples with x = 0.2, the lattice thermal conductivity increases with increasing x, which is related to a less distorted structure. The structure evolution, together with the change in carrier concentration, also leads to a systemically change in electrical properties. Finally, a zT of 0.55@750 K is obtained for the sample with x = 0.3, about 62% higher than that for the pristine sample. © 2018 Chinese Physical Society and IOP Publishing Ltd. |
| DOI | 10.1088/1674-1056/27/6/067201 |
| 发表期刊 | Chinese Physics B
 |
| ISSN | 16741056 |
| 卷号 | 27期号:6 |
| 收录类别 | EI |
| 语种 | 英语 |
| EISSN | 20583834 |
