Two-dimensional electron gas and modulation doping in the thermoelectric optimization of PbSe-AgSbSe2

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-03-29 DOI:10.1016/j.cej.2025.162109

Jianfeng Cai, Zongwei Zhang, Lulu Chen, Chenhao Han, Ailong Yang, Chuandong Zhou, Zhe Guo, Chen Cui, Xiaojian Tan, Guoqiang Liu, Jiehua Wu, Jun Jiang

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引用次数: 0

Abstract

To improve the performance of thermoelectric materials is always a challenge because of the intrinsic coupling of transport factors. Here, we report a unique strategy to decouple the thermoelectric parameters. By designing a two-component mixture of PbSe-based material, high-density interface is constructed to induce the two-dimensional electron gas, which minimizes the ionized impurity scattering. The optimized sample exhibits a threefold increase in electrical conductivity, while its Seebeck coefficient remains unchanged. Owing to the decoupling of electrical conductivity and Seebeck coefficient, the optimization achieves a remarkable enhancement in average zT, ranging from 0.6 to 1.05, and a very competitive peak zT of 1.65 at 823 K. Besides the reached high thermoelectric performance, this study also demonstrates a unique and highly promising strategy for thermoelectric materials. A remarkable conversion efficiency of 9.6 % at a temperature difference of 500 K is achieved in the fabricated Pb-based module.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.