Enhanced Thermoelectric Cooling Performance of (Bi, Sb)2Te3 Through Platinum Doping

IF 10 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Physics Pub Date : 2025-03-19 DOI:10.1016/j.mtphys.2025.101705

Jiayue Du, Yuxin Sun, Fengkai Guo, Haoyang Tong, Zhiyuan Yu, Zihang Liu, Jianbo Zhu, Jiehe Sui

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Abstract

The requirements for solid-state cooling are growing, especially under extreme conditions. Bi₂Te₃-based alloys stand as the sole thermoelectric (TE) materials currently available for large-scale commercial use, and it is of great significance to further improve their TE properties. In this study, Pt is doped into p-type Bi_0.4Sb_1.6Te₃ to optimize its TE transport performance. The doping of Pt results in a dramatic rise in carrier concentration and power factor. Simultaneously, the existence of the second phases PtSb along with nanopores, contribute to an obvious reduction in lattice thermal conductivity. Hence, the ZT value is boosted to 1.43 at 348 K, and the average ZT from 300 K to 450 K is as high as 1.32. The 7-pair TE cooling module is fabricated based on this material, which exhibits a maximum cooling temperature difference of 92.2 K, and a maximum cooling capacity of 2.9 W when the hot-side temperature is 350 K. This outstanding progress will facilitate the further development of Bi₂Te₃ cooling modules.

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来源期刊

Materials Today Physics Materials Science-General Materials Science

CiteScore

14.00

自引率

7.80%

发文量

284

审稿时长

15 days

期刊介绍： Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.