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<p>Free-standing multiwalled carbon nanotubes (MWCNTs) sheet exhibits low thermoelectric power factor due to poor inter-junctions’ connectivity. The present work demonstrates a simultaneous improvement of two anti-correlated thermoelectric parameters-Seebeck coefficient and electrical conductivity of free-standing MWCNTs sheet through dual doping with PEDOT: PSS and SnTe. The sequential energy dependent scattering of charge carriers at MWCNT/PEDOT-SnTe interfaces leads to a significant improvement of Seebeck coefficient. The enhanced carrier concentration along with the facile transport of the high energy charge carriers through PEDOT-SnTe composites due to improved connectivity between MWCNTs renders improvement of electrical conductivity. Such a synergetic combination of improved Seebeck coefficient and electrical conductivity resulted in a 7-fold enhancement in power factor of MWCNT/PEDOT: PSS-SnTe composite films.</p>

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Improving power factor of multiwalled carbon nanotube films through dual doping and sequential energy filtering of charge carriers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月22日

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  • Suman K. Mishra,
  • Meetu Bharti,
  • Bhanu Partap Singh,
  • S. Bhattacharya,
  • S. Samanta,
  • P. Jha,
  • V. S. Rawat,
  • Ajay Singh

摘要

Free-standing multiwalled carbon nanotubes (MWCNTs) sheet exhibits low thermoelectric power factor due to poor inter-junctions’ connectivity. The present work demonstrates a simultaneous improvement of two anti-correlated thermoelectric parameters-Seebeck coefficient and electrical conductivity of free-standing MWCNTs sheet through dual doping with PEDOT: PSS and SnTe. The sequential energy dependent scattering of charge carriers at MWCNT/PEDOT-SnTe interfaces leads to a significant improvement of Seebeck coefficient. The enhanced carrier concentration along with the facile transport of the high energy charge carriers through PEDOT-SnTe composites due to improved connectivity between MWCNTs renders improvement of electrical conductivity. Such a synergetic combination of improved Seebeck coefficient and electrical conductivity resulted in a 7-fold enhancement in power factor of MWCNT/PEDOT: PSS-SnTe composite films.