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<p>Autonomous, bio-integrated electronic systems, such as smart prosthetics and functional electronic skins, require materials combining energy harvesting with perception. Although Indium Antimonide is well established in high-speed electronics owing to its high electron mobility, yet its large intrinsic thermal conductivity has limited its use in thermoelectric energy harvesting. Here, we introduce a peritectic engineering strategy to reduce the thermal bottleneck. Thermodynamic control of the peritectic reaction generates hierarchical InBi@(Bi, Sb) core–shell nanostructures that reduce the room-temperature lattice thermal conductivity from 13.1 to 6.84 W m<sup>-1</sup> K<sup>-1</sup>. This microstructural manipulation raise the power factor by 98% at 473 K, yielding a marked decoupling of electron and phonon transport. A compact, self-powered InSb-InBi/Cu<sub>3</sub>InSnSe<sub>5</sub> module drives commercial electronics under moderate thermal gradients. The module also functions as a zero-power thermo-tactile interface for prosthetic limbs, enabling covert thermal messaging via Morse code decoded by a transfer learning algorithm a transfer learning algorithm. This platform enables the integration of thermoelectric materials into intelligent human-machine interfaces, advancing the development of self-powered sensory systems.</p>

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Peritectic engineering enhanced thermoelectrics for smart thermal messaging devices

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月15日

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  • Jiwu Xin,
  • Ziwang Luo,
  • Wang Li,
  • Pengyu Zhang,
  • Chengyun Xu,
  • Shixing Yuan,
  • Wulong Li,
  • Long Chen,
  • Tianzhu Zhou,
  • Yuntian Wang,
  • Abdul Basit,
  • Yubo Luo,
  • Junyou Yang,
  • Ting Zhang,
  • Lei Wei

摘要

Autonomous, bio-integrated electronic systems, such as smart prosthetics and functional electronic skins, require materials combining energy harvesting with perception. Although Indium Antimonide is well established in high-speed electronics owing to its high electron mobility, yet its large intrinsic thermal conductivity has limited its use in thermoelectric energy harvesting. Here, we introduce a peritectic engineering strategy to reduce the thermal bottleneck. Thermodynamic control of the peritectic reaction generates hierarchical InBi@(Bi, Sb) core–shell nanostructures that reduce the room-temperature lattice thermal conductivity from 13.1 to 6.84 W m-1 K-1. This microstructural manipulation raise the power factor by 98% at 473 K, yielding a marked decoupling of electron and phonon transport. A compact, self-powered InSb-InBi/Cu3InSnSe5 module drives commercial electronics under moderate thermal gradients. The module also functions as a zero-power thermo-tactile interface for prosthetic limbs, enabling covert thermal messaging via Morse code decoded by a transfer learning algorithm a transfer learning algorithm. This platform enables the integration of thermoelectric materials into intelligent human-machine interfaces, advancing the development of self-powered sensory systems.