期刊
SCIENCE CHINA-MATERIALS
卷 62, 期 3, 页码 389-398出版社
SCIENCE PRESS
DOI: 10.1007/s40843-018-9312-5
关键词
thermoelectric; liquid-phase sintering; nanocomposites; solution-processed; bismuth telluride
资金
- Natural Science Foundation of SZU [2017003]
- Shenzhen Science and Technology Research Grant [JCYJ20150324141711684]
- Singapore National Research Foundation [NRF-RF2009-06]
- Investigator-ship Award, Ministry of Education (Singapore) via an AcRF Tier2 Grant [NRF-NRFI2015-03, MOE2012-T2-2-086]
The much slower progress in enhancing the thermoelectric performance of n-type Bi2Te3 than that of p-type Bi2Te3 based materials in the past decade hinders the widespread use in power generation and refrigeration. Here, a facile bottom-up solution-synthesis with spark plasma sintering (SPS) process has been developed to build n-type Bi2Te3-xSex bulk nanocomposites, which substantially improves the power factor and decreases the lattice thermal conductivity by tuning the interface scattering of phonons and electrons. The stoichiometric composition in ternary Bi2Te3-xSex nanocomposites is also tuned to optimize the carrier concentration and lattice thermal conductivity. The optimized bulk nanocomposite Bi2Te2.7Se0.3 exhibits a ZT of 1.1 at similar to 371 K, which is comparable to the corresponding commercially available ingots. Our results demonstrate the great potential of the solution-processed n-type Bi2Te3-xSex nanocomposites for cost-effective thermoelectric applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据