能带和界面工程对Bi0.46Sb1.54Te3热电性能的协同优化效应

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-07-22 DOI:10.1063/5.0270925

Kaiwen Zhao, Mengyao Li, Yingjiu Zhang, Hongzhang Song

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引用次数: 0

摘要

热电材料的塞贝克系数、电阻率和导热系数之间的强耦合使得通过单一的调节策略难以实现高热电性能。这些物理参数的协同优化通常是可行的。本文同时优化了区域熔炼和热压法制备的块体（CuO）0.07Bi0.46Sb1.54Te3 + 2 wt. % Te + 0.5 wt. % SiC的电输运和热输运性能。由于其载流子浓度高，有效质量大，声子散射强，在432 K时ZTmax峰值提高到1.55。特别是在307-550 K时，它的平均ZTave值达到了异常值1.37。

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Synergistic optimization effects of energy band and interface engineering on the thermoelectric properties of Bi0.46Sb1.54Te3

The strong coupling between the Seebeck coefficient, electrical resistivity, and thermal conductivity of thermoelectric materials makes it difficult to achieve high thermoelectric performance through a single regulation strategy. Synergistic optimization of these physical parameters is usually feasible. In this work, both electrical and thermal transport properties of bulk (CuO)0.07Bi0.46Sb1.54Te3 + 2 wt. % Te + 0.5 wt. % SiC prepared by zone melting and hot pressing are optimized simultaneously. Due to its high carrier concentration, large effective mass, and strong phonon scattering, the peak ZTmax value is improved to 1.55 at 432 K. Particularly, its average ZTave value at 307–550 K reaches an exceptional value of 1.37.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.