手机知网 App
24小时专家级知识服务
打 开
材料科学
Enhanced thermoelectric performance of ternary compound Cu_3PSe_4 by defect engineering
The diamond-like compound Cu_3PSe_4 with low lattice thermal conductivity is deemed to be a promising thermoelectric material,which can directly convert waste heat into electricity or vice versa with no moving parts and greenhouse emissions.However,its performance is limited by its low electrical conductivity.In this study,we report an effective method to enhance thermoelectric performance of Cu_3PSe_4 by defect engineering.It is found that the carrier concentrations of Cu_(3-x)PSe_4(x=0,0.03,0.06,0.09,0.12) compounds are increased by two orders of magnitude as x> 0.03,from 1 × 10~(17) to 1 × 10~(19) cm-3.Combined with the intrinsically low lattice thermal conductivities and enhanced electrical transport performance,a maximum zT value of 0.62 is obtained at 727 K for x=0.12 sample,revealing that Cu defect regulation can be an effective method for enhancing thermoelectric performance of Cu_3PSe_4.
0 4
手机阅读本文
下载APP 手机查看本文
Rare Metals
2020年11期

搜 索