低成本和高性能的n型mg3sb1.5 bi0.5基热电材料通过Zn和Se共掺杂应用于中低温

IF 2.5 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Applied Physics A Pub Date : 2025-01-21 DOI:10.1007/s00339-025-08255-x
Xin Yan, Huisong Zeng, Xueguo Liu, Xiaolan Zhang, Guocai Yuan, Tong Liu, Ruonan Min, Biyou Peng, Lihong Huang
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引用次数: 0

摘要

提高功率因数是提高热电性能的关键参数,因此必须找到有效的提高功率因数的策略。本文研究了掺杂Zn和Se的n型mg3sb1.5 bi0.5基热电材料。在Mg3.2Sb1.5Bi0.49Se0.01中加入Se调节载流子浓度,在Mg3.2Sb1.5Bi0.49Se0.01中加入Zn调控载流子散射机制。实验结果表明,载流子迁移率从42.21 cm2 V−1 s−1显著增加到73.92 cm2 V−1 s−1,导致电导率和功率因数在整个温度范围内的显著增强。此外,由于在Zn和Se共掺杂样品中引入高效声子散射中心导致晶格热导率降低,Mg3.18Zn0.02Sb1.5Bi0.49Se0.01在623 K时达到最大ZT值1.77,从而在300 ~ 673 K温度范围内平均ZT≈1.24。鉴于其成本效益和低毒性,该材料有望取代市售的通常用于中低温的n型bi2te3基热电材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Low-cost and high-performance N-type Mg3Sb1.5Bi0.5-based Thermoelectric materials for medium and low temperature applications via Zn and Se co-doping

Improving the power factor is a crucial parameter in enhancing thermoelectric performance, making it essential to find an effective strategy for its enhancement. This study examines n-type Mg3Sb1.5Bi0.5-based thermoelectric materials doped with Zn and Se. Se is added to adjust the carrier concentration, while Zn is introduced into Mg3.2Sb1.5Bi0.49Se0.01 to manipulate the carrier scattering mechanism. Experimental results indicate a significant increase in carrier mobility from 42.21 cm2 V− 1 s− 1 to 73.92 cm2 V− 1 s− 1, leading to a substantial enhancement in electrical conductivity and power factor across the entire temperature range under investigation. Additionally, due to reduced lattice thermal conductivity resulting from the introduction of efficient phonon scattering centers in the Zn and Se co-doped sample, Mg3.18Zn0.02Sb1.5Bi0.49Se0.01 attains a maximum ZT value of 1.77 at 623 K, resulting in a notable average ZT ≈ 1.24 over the temperature range of 300 to 673 K. Given its cost-effectiveness and low toxicity, this material is anticipated to replace the commercially available n-type Bi2Te3-based thermoelectric materials commonly used at moderate and low temperatures.

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来源期刊
Applied Physics A
Applied Physics A 工程技术-材料科学:综合
CiteScore
4.80
自引率
7.40%
发文量
964
审稿时长
38 days
期刊介绍: Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.
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