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Thermoelectric properties of Co-doped ZnO by incorporating organic nanoparticles
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School of Environmental and Materials Engineering,College of Engineering,Shanghai Polytechnic University,School of Environmental and Materials Engineering,College of Engineering,Shanghai Polytechnic University,School of Environmental and Materials Engineering,College of Engineering,Shanghai Polytechnic University,School of Environmental and Materials Engineering,College of Engineering,Shanghai Polytechnic University,School of Environmental and Materials Engineering,College of Engineering,Shanghai Polytechnic University

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TB34

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    Abstract:

    Organic-inorganic nanojunction can results in a selective scattering of charge carrier depending on their energy, which leads to a simultaneous increase in Seebeck coefficient S and power factor PF when the Fermi levels of the constituent materials are aligned appropriately. In this work, the nanojunction was successfully employed at the organic-inorganic semiconductor interface of polyparaphenylene (PPP) and Zn1-xCoxO nanoparticles through sol-gel method. The resulting Zn0.925Co0.075O/9 wt% PPP hybrids exhibited a high power factor due to the largest electrical conductivity and higher Seebeck coefficient. Moreover, organic-inorganic nano-interface effectively reduces the thermal conductivity by interface scattering of phonons. All these effects finally lead to a thermoelectric figure of merit, ZT up to 0.22 in these inorganic-organic nanocomposites, which corresponds to a 5-fold enhancement compared to that of the Zn0.925Co0.075O matrix. This work demonstrates the effectiveness of nanojunctions and provides a rational route to high performance thermoelectrics in a bulk material.

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[Zihua Wu, Huaqing Xie, Yuanyuan Wang, Jiaojiao Xing, Jianhui Mao. Thermoelectric properties of Co-doped ZnO by incorporating organic nanoparticles[J]. Rare Metal Materials and Engineering,2018,47(2):452~456.]
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History
  • Received:March 03,2016
  • Revised:June 01,2016
  • Adopted:December 06,2016
  • Online: March 15,2018
  • Published: