(AgSbTe2)1-x(Bi2Te3)x-based thermoelectric device for low-grade heat recovery

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

Materials Today Physics Pub Date : 2025-03-01 DOI:10.1016/j.mtphys.2025.101692

Di Zhang, Min Liu, Tao Jin, Long Yang, Wen Li, Yanzhong Pei

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引用次数: 0

Abstract

Near room-temperature thermoelectric materials have promising applications for recovering low-grade waste heat, but high-performance p-type thermoelectric candidates are quite limited if compared with n-type ones. It is thus important to design new p-type materials with superior thermoelectric performance. AgSbTe₂ has received plenty of attention as a promising p-type material candidate due to its intrinsically low thermal conductivity, which is further decreased by introducing vacancies and substitutional point defects by alloying with Bi₂Te₃ in this work. With the additional help of Cd substitution at the Sb site, the optimized carrier concentration leads to a peak zT value of 0.93 at 450 K for (AgSb_0.98Cd_0.02Te₂)_0.9(Bi₂Te₃)_0.1, and the corresponding single-leg device achieves a conversion efficiency of ∼4.2 % at a temperature gradient ΔT of ∼162 K. By further pairing with an n-type Ag₂Se leg, a conversion efficiency of ∼1.8 % is realized at a ΔT of ∼93 K for the obtained module, suggesting its potential applications in the low-grade heat recovery.

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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.