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Enhanced Thermoelectric Characteristics of Ag 2 Se Nanoparticle Thin Films by Embedding Silicon Nanowires

Author

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  • Seunggen Yang

    (Department of Electrical Engineering, Korea University, Seoul 02841, Korea)

  • Kyoungah Cho

    (Department of Electrical Engineering, Korea University, Seoul 02841, Korea)

  • Sangsig Kim

    (Department of Electrical Engineering, Korea University, Seoul 02841, Korea)

Abstract

A solution-processable Ag 2 Se nanoparticle thin film (NPTF) is a prospective thermoelectric material for plastic-based thermoelectric generators, but its low electrical conductivity hinders the fabrication of high performance plastic-based thermoelectric generators. In this study, we design Ag 2 Se NPTFs embedded with silicon nanowires (SiNWs) to improve their thermoelectric characteristics. The Seebeck coefficients are −233 and −240 µV/K, respectively, for a Ag 2 Se NPTF alone and a Ag 2 Se NPTF embedded with SiNWs. For the Ag 2 Se NPTF embedded with SiNWs, the electrical conductivity is improved from 0.15 to 18.5 S/m with the embedment of SiNWs. The thermal conductivities are determined by a lateral thermal conductivity measurement for nanomaterials and the thermal conductivities are 0.62 and 0.84 W/(m·K) for a Ag 2 Se NPTF alone and a Ag 2 Se NPTF embedded with SiNWs, respectively. Due to the significant increase in the electrical conductivity and the insignificant increase in its thermal conductivity, the output power of the Ag 2 Se NPTF embedded with SiNWs is 120 times greater than that of the Ag 2 Se NPTF alone. Our results demonstrate that the Ag 2 Se NPTF embedded with SiNWs is a prospective thermoelectric material for high performance plastic-based thermoelectric generators.

Suggested Citation

  • Seunggen Yang & Kyoungah Cho & Sangsig Kim, 2020. "Enhanced Thermoelectric Characteristics of Ag 2 Se Nanoparticle Thin Films by Embedding Silicon Nanowires," Energies, MDPI, vol. 13(12), pages 1-10, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:12:p:3072-:d:371201
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    References listed on IDEAS

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    2. Rama Venkatasubramanian & Edward Siivola & Thomas Colpitts & Brooks O'Quinn, 2001. "Thin-film thermoelectric devices with high room-temperature figures of merit," Nature, Nature, vol. 413(6856), pages 597-602, October.
    3. Allon I. Hochbaum & Renkun Chen & Raul Diaz Delgado & Wenjie Liang & Erik C. Garnett & Mark Najarian & Arun Majumdar & Peidong Yang, 2008. "Enhanced thermoelectric performance of rough silicon nanowires," Nature, Nature, vol. 451(7175), pages 163-167, January.
    4. Akram I. Boukai & Yuri Bunimovich & Jamil Tahir-Kheli & Jen-Kan Yu & William A. Goddard III & James R. Heath, 2008. "Silicon nanowires as efficient thermoelectric materials," Nature, Nature, vol. 451(7175), pages 168-171, January.
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