journal article·2025-07Open access

General Screening Rules and Segmented Optimization Strategy for Efficient Thermoelectric Devices Validated by Mg 3 (Sb,Bi) 2 /Bi 0.5 Sb 1.5 Te 3 ‐GeTe Module

Kai‐Yu Yang, Xiaoyuan Li, Yuanxin Jiang, Liangliang Wang, Kai Guo, Lei Miao, Junliang Chen, Jiye Zhang, Lin Li, Yusong Du, Guang‐Hui Rao, Jun Luo, Jing‐Tai Zhao

Advanced Science· Volume 12· Issue 27

Abstract

Abstract Segmentation is a widely adopted strategy to enhance the efficiency of medium‐ and high‐temperature thermoelectric devices by capitalizing on the distinct properties of materials across various temperature ranges. Establishing a highly compatible matching relationship is crucial for maximizing conversion efficiency. In this study, the concepts of materials’ compatibility factor and relative current density into the screening process are emphasized for universal adaptability. The effectiveness and practicality of the theoretical model for optimal segmented combinations are validated through COMSOL finite element simulations and experimental results. A segmented thermoelectric power generation device is constructed that integrates the environmentally friendly n‐type Mg 3 (Sb,Bi) 2 with the optimal segmented pairing of Bi 0.5 Sb 1.5 Te 3 ‐GeTe. Notably, at a temperature difference of Δ T = 440 K, this device achieves a maximum conversion efficiency of 10.4% and a peak output power of 0.41 W. These findings provide a solid theoretical foundation for the development of efficient combinations of thermoelectric materials.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Advanced Thermodynamics and Statistical Mechanics · Thermal Radiation and Cooling Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering Guilin University of Electronic Technology Guilin 541004 China

School of Physics and Materials Science Guangzhou University Guangzhou 510006 China

Key Lab of Si‐based Information Materials & Devices and Integrated Circuits Design Department of Education of Guangdong Province Guangzhou 510006 China

Guangxi Novel Battery Materials Research Center of Engineering Technology State Key Laboratory of Featured Metal Materials and Life‐cycle Safety for Composite Structures School of Physical Science and Technology Guangxi University Nanning 530004 China

Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin 541004 China

School of Materials Science and Engineering Shanghai University Shanghai 200444 China

Interdisciplinary Materials Research Center School of Materials Science and Engineering Tongji University Shanghai 201804 China

Funding

National Natural Science Foundation of China

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