Thermoelectric Enhancements in PbTe Alloys Due to Dislocation-Induced Strains and Converged Bands
文献类型：期刊论文
| 作者 | Wu, YX; Nan, PF; Chen, ZW; Zeng, ZZ; Liu, RH; Dong, HL; Xie, L; Xiao, YW; Chen, ZQ; Gu, HK |
| 刊名 | ADVANCED SCIENCE
 |
| 出版日期 | 2020-06-01 |
| 期号 | 12 |
| DOI | 10.1002/advs.201902628 |
| 文献子类 | Article |
| 英文摘要 | In-grain dislocation-induced lattice strain fluctuations are recently revealed as an effective avenue for minimizing the lattice thermal conductivity. This effect could be integratable with electronic enhancements such as by band convergence, for a great advancement in thermoelectric performance. This motivates the current work to focus on the thermoelectric enhancements of p-type PbTe alloys, where monotelluride-alloying and Na-doping are used for a simultaneous manipulation on both dislocation and band structures. As confirmed by synchrotron X-ray diffractions and Raman measurements, the resultant dense in-grain dislocations induce lattice strain fluctuations for broadening the phonon dispersion, leading to an exceptionally low lattice thermal conductivity of approximate to 0. 4 W m-K-1. Band structure calculations reveal the convergence of valence bands due to monotelluride-alloying. Eventually, the integration of both electronic and thermal improvements lead to a realization of an extraordinary figure of merit zT of approximate to 2.5 in Na0.03Eu0.03Cd0.03Pb0.91Te alloy at 850 K. |
| WOS关键词 | RAMAN-SCATTERING ; THERMAL-CONDUCTIVITY ; HIGH FIGURE ; THIN-FILMS ; PERFORMANCE ; CDTE ; NANOSTRUCTURES ; REDUCTION ; PHONONS ; PHASE |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | WILEY |
| 源URL | [http://ir.sic.ac.cn/handle/331005/28063]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Wu, YX,Nan, PF,Chen, ZW,et al. Thermoelectric Enhancements in PbTe Alloys Due to Dislocation-Induced Strains and Converged Bands[J]. ADVANCED SCIENCE,2020(12). |
| APA | Wu, YX.,Nan, PF.,Chen, ZW.,Zeng, ZZ.,Liu, RH.,...&Pei, YZ.(2020).Thermoelectric Enhancements in PbTe Alloys Due to Dislocation-Induced Strains and Converged Bands.ADVANCED SCIENCE(12). |
| MLA | Wu, YX,et al."Thermoelectric Enhancements in PbTe Alloys Due to Dislocation-Induced Strains and Converged Bands".ADVANCED SCIENCE .12(2020). |
入库方式： OAI收割
来源：上海硅酸盐研究所
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