通过cur诱导相变和声子散射增强SnSe 2的热电性能

IF 3.1 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemical Physics Letters Pub Date : 2025-09-13 DOI:10.1016/j.cplett.2025.142418

Shoumei Liu , Siqi Lin , Zhenyu Lai , Zhenjia Liu , Xiaotang Yang , Xiaofei Yue , Min Jin

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引用次数: 0

摘要

SnSe2是一种范德华层状半导体，是一种很有前途的n型热电材料。在这项研究中，我们证明了直接掺杂cur可以使（SnSe2）1-x(cur)x中的2H结构转变为4H结构。（SnSe2）0.96(cur)0.04样品在室温下具有约40 cm2 V−1·s−1的高霍尔迁移率，在700 K时晶格热导率约为0.35 W·m−1·K−1。获得了0.87的峰值值，高于大多数先前报道的多晶SnSe2的值。这项工作强调了cur作为优化层状半导体热电输运的双掺杂剂的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhanced thermoelectric performance in SnSe₂ through CuBr induced phase transition and phonon scattering

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Enhanced thermoelectric performance in SnSe₂ through CuBr induced phase transition and phonon scattering

SnSe₂ is a van der Waals layered semiconductor and a promising n-type thermoelectric candidate. In this study, we demonstrate that direct doping with CuBr enables a phase transition from the 2H to 4H structure in (SnSe₂)_1-x(CuBr)_x. The (SnSe₂)_0.96(CuBr)_0.04 sample exhibits a high Hall mobility of approximately 40 cm² V⁻¹·s⁻¹ at room temperature and a remarkably low lattice thermal conductivity of about 0.35 W·m⁻¹·K⁻¹ at 700 K. A peak figure of merit of 0.87 was achieved, higher than most previously reported values for polycrystalline SnSe₂. This work highlights the effectiveness of CuBr as a dual-dopant for optimizing thermoelectric transport in layered semiconductors.

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来源期刊

Chemical Physics Letters 化学-物理：原子、分子和化学物理

CiteScore

5.70

自引率

3.60%

发文量

798

审稿时长

33 days

期刊介绍： Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage. Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.