首页|Monolayer group-Ⅳ monochalcogenides: A promising platform for near-field radiative heat transfer

Monolayer group-Ⅳ monochalcogenides: A promising platform for near-field radiative heat transfer

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  • NETL
  • NSTL
  • Elsevier
Recent advances in near-field radiative heat transfer (NFRHT), taking advantage of evanescent modes, promise a wide variety of interesting applications in material science and thermal energy management at nanoscale. However, the lack of knowledge on suitable materials poses a bottleneck to the deployment of NFRHT concepts in practical applications. In this paper, the NFRHT is studied in a well-known category of two-dimensional (2D) materials, MX (M = Ge, Sn; X = S, Se, Te) phase of monolayers of group-IV monochalcogenides. Such material systems can significantly improve the ability to confine and control heat radiation thanks to its highly anisotropic plasmonic properties. Super-Planckian radiation enhancement of more than three orders of magnitudes over the blackbody limit is reported when the vacuum gap scales down to ≈ 100 nm. The effect of changing the chalcogen species on the performance of near-field radiative heat transfer has also been discovered, that originates from the modulation of electronegativity. This enables the deep near-field (DNF) regime to extend even at significantly high vacuum gap sizes (≈ 300 nm) when the appropriate doping concentration is chosen. Additionally, it has been shown that electrochemical doping, injecting electrons, can strongly modulate NFRHT responses of MX monolayers. So that, the peak frequency of spectral heat flux is being shifted about 0.02 eV at any n = 1×10~(12) cm~(-2) of the charge density step in the GeTe monolayer. Moreover, the amplitude of spectral heat flux relevant to the GeTe monolayer increased by approximately 1 nJm~(-2)rad~(-1) for the aforementioned charge density step. This work lays the foundation for a novel cooling strategy for next-generation integrated circuits (ICs), harnessing the remarkable potential of the MX family of materials.

Two-dimensional materialsMonochalcogenidesPlasmonicsNanostructuresNear-field heat transferThermal management

Z. Valiollahi、M. Dehdast、C.L. Zhou、P. Li、M. Neshat

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School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran 14395-515, Iran

Department of Electrical and Computer Engineering, Qom University of Technology, Qom, Iran

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China||Key Laboratory of Aerospace Thermophysics, Ministry of Industry and Information Technology, Harbin 150001, PR China

Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR China

School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran 14395-515, Iran||School of Engineering and Informatics, University of Sussex, Falmer, UK

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2025

10.1016/j.ijheatmasstransfer.2025.127226

International journal of heat and mass transfer

International journal of heat and mass transfer

SCI
ISSN：0017-9310
年,卷(期)：2025.250(Nov.)
  • 71