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<p>The coupling of ionic and electronic transport in solid-state systems offers new opportunities for realizing compact, energy-efficient sensing technologies, yet practical implementations remain limited. Here we introduce a two-dimensional iontronic platform based on field-effect transistors that integrate monolayer MoS<sub>2</sub> channels with van der Waals bimetallic thiophosphates (<i>A</i><i>B</i>P<sub>2</sub><i>X</i><sub>6</sub>, <i>A</i> = Li, Cu, Ag and so on; <i>B</i> = In, Sc and so on; and <i>X</i> = S and Se) as ionic gate dielectrics to realize on-chip thermometry. Specifically, we exploit thermally activated ion migration within the gate dielectric leading to conductance modulation in the MoS<sub>2</sub> channel for temperature sensing. We achieve ~1–2 °C resolution, fast electronic readout and subpicojoule energy consumption in an ultracompact footprint (~1 µm<sup>2</sup>). Beyond thermometry, these results establish bimetallic thiophosphates as a versatile platform for solid-state iontronics and broaden the functional design space of van der Waals heterostructures for sensing, actuation and adaptive electronics.</p>

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Solid-state thermometry via ionic–electronic coupling in two-dimensional heterostructures

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Dipanjan Sen,
  • Anirban Chowdhury,
  • Safdar Imam,
  • Anshul Rasyotra,
  • Joan M. Redwing,
  • Zdenek Sofer,
  • Alireza Sepehrinezhad,
  • Adri van Duin,
  • Arpan Ghosh,
  • Chen Chen,
  • Vlastimil Mazanek,
  • Thomas S. Ie,
  • Mercouri G. Kanatzidis,
  • Saptarshi Das

摘要

The coupling of ionic and electronic transport in solid-state systems offers new opportunities for realizing compact, energy-efficient sensing technologies, yet practical implementations remain limited. Here we introduce a two-dimensional iontronic platform based on field-effect transistors that integrate monolayer MoS2 channels with van der Waals bimetallic thiophosphates (ABP2X6, A = Li, Cu, Ag and so on; B = In, Sc and so on; and X = S and Se) as ionic gate dielectrics to realize on-chip thermometry. Specifically, we exploit thermally activated ion migration within the gate dielectric leading to conductance modulation in the MoS2 channel for temperature sensing. We achieve ~1–2 °C resolution, fast electronic readout and subpicojoule energy consumption in an ultracompact footprint (~1 µm2). Beyond thermometry, these results establish bimetallic thiophosphates as a versatile platform for solid-state iontronics and broaden the functional design space of van der Waals heterostructures for sensing, actuation and adaptive electronics.