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Thermoelectric characteristics of nanocomposites made of HgSe and Ag nanoparticles for flexible thermoelectric devices

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Abstract

We synthesized thermoelectric nanocomposites by mixing HgSe nanoparticles (NPs) and Ag NPs in a solution and investigated the thermoelectric properties of the nanocomposite thin films on flexible plastic substrates. The X-ray diffraction patterns and the X-ray photoelectron spectra of the nanocomposites demonstrate that cation-exchange reactions occurred spontaneously in the mixed solution of HgSe and Ag NPs and that the HgSe NPs were completely converted to Ag2Se when the Ag NP content was 20 vol.%. The maximum power factor and the thermoelectric figure of merit were obtained as 75 μW/mK2 and 0.043 at 300 K, respectively, when the Ag NP content was 10 vol.%, which is 100 times higher than that of HgSe NP thin films. In addition, the mechanical stability of the thermoelectric nanocomposite film was confirmed through repeated bending tests.

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Acknowledgements

This work was supported by the Mid-career Researcher Program (No. NRF-2013R1A2A1A03070750) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology, the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSIP) (No. NRF-2015R1A5A7037674), and the Brain Korea 21 Plus Project in 2016.

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  1. Department of Electrical Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 136-701, Republic of Korea

    Junggwon Yun, Kyoungah Cho, Yoonbeom Park, Seunggen Yang, Jinyong Choi & Sangsig Kim

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  1. Junggwon Yun
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  2. Kyoungah Cho
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  3. Yoonbeom Park
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  4. Seunggen Yang
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  5. Jinyong Choi
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  6. Sangsig Kim
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Correspondence to Kyoungah Cho or Sangsig Kim.

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Yun, J., Cho, K., Park, Y. et al. Thermoelectric characteristics of nanocomposites made of HgSe and Ag nanoparticles for flexible thermoelectric devices. Nano Res. 10, 683–689 (2017). https://doi.org/10.1007/s12274-016-1327-z

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