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Breaking the tradeoff among thermoelectric parameters by multi composite of porosity and CNT in AZO films

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  • Liu, Shiying
  • Lan, Mingdi
  • Li, Guojian
  • Piao, Yongjun
  • Ahmoum, Hassan
  • Wang, Qiang

Abstract

Multi-nanocomposite is an effective method to achieve high thermoelectric (TE) performance by breaking the tradeoff among three TE parameters. This paper presents a comparative study of incorporated carbon nanotube (CNT)/Au in evaporated porous Al-doped ZnO (AZO) films. The effect of the nanocomposite interface on scattering of carriers and phonons is used to independently tune thermal conductivity and power factor in the multi-nanocomposite AZO films. This breaks the tradeoff and improves the figure of merit (ZT) of the film. Moreover, the temperature gradient retains in the out-of-plane of the films. These make the AZO film composited CNT and porosity have higher output power than that of the non-porous films. This provides a simple method for the low-dimension film to increase the TE properties through breaking the tradeoff and makes the TE materials suitable for efficient harvesting in low-grade waste heat.

Suggested Citation

  • Liu, Shiying & Lan, Mingdi & Li, Guojian & Piao, Yongjun & Ahmoum, Hassan & Wang, Qiang, 2021. "Breaking the tradeoff among thermoelectric parameters by multi composite of porosity and CNT in AZO films," Energy, Elsevier, vol. 225(C).
    • Handle: RePEc:eee:energy:v:225:y:2021:i:c:s0360544221005697
    DOI: 10.1016/j.energy.2021.120320
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    1. Fitriani, & Ovik, R. & Long, B.D. & Barma, M.C. & Riaz, M. & Sabri, M.F.M. & Said, S.M. & Saidur, R., 2016. "A review on nanostructures of high-temperature thermoelectric materials for waste heat recovery," Renewable and Sustainable Energy Reviews, Elsevier, vol. 64(C), pages 635-659.
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