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Cu–Bi2S3 and NiS@Bi2S3 composites were synthesized using the solvothermal process. XRD pattern revealed the presence of interstitial Cu ions and the NiS phase with Bi2S3. Electrical conductivity and Seebeck coefficient of 0.03Cu–Bi2S3 indicate a carrier-dependent transport mechanism. NiS@Bi2S3 composite exhibited energy-dependent transport, suggesting an energy filtering effect that enhanced the Seebeck coefficient over temperature. 0.03Cu–Bi2S3 demonstrating a maximum average power factor compared to NiS@Bi2S3. The enhanced power factor in 0.03Cu–Bi2S3 was attributed to the high electrical conductivity facilitated by the interstitial Cu ions. This finding highlights the two different mechanisms involved in the transport of the base material Bi2S3.

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Analyzing Carrier-Dependent and Energy Filtering Effect on Bi2S3 for Thermoelectric Properties

  • 会议论文

  • 发表日期：

    2026年

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  • K. Aishwarya,
  • S. Maruthasalamoorthy,
  • J. Mani,
  • R. Nirmala,
  • R. Navamathavan

摘要

Cu–Bi2S3 and NiS@Bi2S3 composites were synthesized using the solvothermal process. XRD pattern revealed the presence of interstitial Cu ions and the NiS phase with Bi2S3. Electrical conductivity and Seebeck coefficient of 0.03Cu–Bi2S3 indicate a carrier-dependent transport mechanism. NiS@Bi2S3 composite exhibited energy-dependent transport, suggesting an energy filtering effect that enhanced the Seebeck coefficient over temperature. 0.03Cu–Bi2S3 demonstrating a maximum average power factor compared to NiS@Bi2S3. The enhanced power factor in 0.03Cu–Bi2S3 was attributed to the high electrical conductivity facilitated by the interstitial Cu ions. This finding highlights the two different mechanisms involved in the transport of the base material Bi2S3.