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Synthesis and Thermoelectric Characterization of Sb-Doped Cu2Se by Mechanical Alloying and Solid-State Reaction

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Abstract

In this study, Sb-doped Cu2Se1−xSbx (x = 0, 0.005, 0.01, 0.015, 0.02, and 0.025) compounds were synthesized using mechanical alloying combined with a solid-state reaction technique. The crystal structure of the Sb-doped samples was a mixture phase between α-Cu2−δSe and β-Cu2−δSe, and a minor phase of Cu3Se2, Cu2O, and excess Sb in high-doping-level samples. The electrical properties of Sb-doped samples were improved when compared to the undoped sample by the enhancement of carrier concentration via the creation of an acceptor level after Sb doping. The thermal conductivity decreased with increasing x and reached the lowest value in the Cu2Se0.98Sb0.02 sample. As a result, the sample with an Sb-doped level of 0.02 showed the highest ZT value of 1.22 at 823 K.

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Acknowledgments

The work was supported by the Vietnam Academy of Science and Technology in the Physical Development Program under Project Code KHCBVL.03/22-23.

Funding

Vietnam Academy of Science and Technology, KHCBVL.03/22-23, Hung Manh Do.

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Authors and Affiliations

  1. Faculty of Materials Science and Engineering, Phenikaa University, Hanoi, 12116, Viet Nam

    Trung Kien Mac & Anh Tuan Duong

  2. Institute of Materials Science, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, 10000, Viet Nam

    Do Hung Manh, Tran Thi Ha Giang, Dao Son Lam, Dinh Chi Linh & Tran Dang Thanh

  3. Faculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi, 12116, Viet Nam

    Huu Tuan Nguyen

  4. Center for Innovative Materials and Architectures, Vietnam National University, Ho Chi Minh City, 700000, Viet Nam

    Anh Tuan Thanh Pham & Bach Thang Phan

  5. Laboratory of Advanced Materials, University of Science, Vietnam National University, Ho Chi Minh City, 700000, Viet Nam

    Anh Tuan Thanh Pham

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  1. Trung Kien Mac
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Contributions

TKM, HTN, TTHG, DSL, and DCL synthesized the samples and performed the experiments. TDT, DHM, and ATD contributed to conceptualization, formal analysis, investigation, review, and editing. TKM and TDT wrote the manuscript, with discussion and comments from all the authors.

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Correspondence to Tran Dang Thanh or Anh Tuan Duong.

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Mac, T.K., Manh, D.H., Nguyen, H.T. et al. Synthesis and Thermoelectric Characterization of Sb-Doped Cu2Se by Mechanical Alloying and Solid-State Reaction. J. Electron. Mater. 53, 693–701 (2024). https://doi.org/10.1007/s11664-023-10808-w

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