Stacking faults modulation for scattering optimization in GeTe-based thermoelectric materials
文献类型：期刊论文
| 作者 | Xie, L; Chen, YJ; Liu, RH; Song, EH; Xing, T; Deng, TT; Song, QF; Liu, JJ; Zheng, RK; Gao, X |
| 刊名 | NANO ENERGY
 |
| 出版日期 | 2020-02-01 |
| ISSN号 | 2211-2855 |
| DOI | 10.1016/j.nanoen.2019.104347 |
| 文献子类 | Article |
| 英文摘要 | The enhancement of thermoelectric (TE) performance is essentially associated with optimizing the scattering effect of electron and phonon. Here, we demonstrate a stacking faults modulation strategy in GeTe materials to simultaneously realize high carrier mobility and low lattice thermal conductivity. Excess Cu doping in GeTe can significantly decrease the concentration of Ge vacancy layer and form a "vacancy/Cu-Cu/vacancy" sandwich-like stacking faults structure. As a result, the hole mobility is remarkably improved to nearly similar to 100 cm(2) V-1 s(-1) at room temperature due to the weakened carrier scattering from vacancy layer, which ensures superior electrical transport properties. Meanwhile, the sandwich-like stacking faults brings much stronger scattering effect on phonons, thus leading to extremely low lattice thermal conductivity of 0.38 W m(-1) K-1. With synergistically optimized scattering effect on carriers and phonons, a peak thermoelectric figure of merit over 2.0 is achieved in Ge0.89Cu0.06Sb0.08Te at 750 K. This work provides an effective strategy to realize selective scattering of phonons and carriers through 2D defect modulation, and makes up the important piece of multi-scale microstructure tailoring for TE materials. |
| WOS关键词 | THERMAL TRANSPORT-PROPERTIES ; HIGH-PERFORMANCE ; CONDUCTIVITY ; ENHANCEMENT ; POWER ; CONVERGENCE ; SUPPRESSION ; EFFICIENCY ; FIGURE ; ALLOY |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.sic.ac.cn/handle/331005/28343]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Xie, L,Chen, YJ,Liu, RH,et al. Stacking faults modulation for scattering optimization in GeTe-based thermoelectric materials[J]. NANO ENERGY,2020. |
| APA | Xie, L.,Chen, YJ.,Liu, RH.,Song, EH.,Xing, T.,...&Chen, LD.(2020).Stacking faults modulation for scattering optimization in GeTe-based thermoelectric materials.NANO ENERGY. |
| MLA | Xie, L,et al."Stacking faults modulation for scattering optimization in GeTe-based thermoelectric materials".NANO ENERGY (2020). |
入库方式： OAI收割
来源：上海硅酸盐研究所
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