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Influence of the Encapsulating Layer Thickness on the Quality of MoSe2-Based Heterostructures

  • ELECTRONIC PROPERTIES OF SOLID
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Abstract

The dependence of the width of exciton and trion photoluminescence lines in MoSe2 monolayers on the thickness of hexagonal boron nitride encapsulating layers has been investigated. The possibility of variation of the exciton photoluminescence linewidth due to the interaction of excitons with the modes of resonator cavities made up of a silicon substrate and a boron nitride top layer has been checked. This interaction may significantly change the photoluminescence linewidth owing to the Parcell effect. Measurements taken of samples with different thicknesses of the bottom and top boron nitride layers have not revealed any influence of the Parcell effect on the linewidth. It has turned out however that the linewidth narrows by several times with increasing boron nitride bottom layer thickness from 10 to 100 nm and reaches 2 meV at a thickness of 100 nm. Supposedly, such narrowing of the photoluminescence line is associated with a decrease in the density of submicron bubbles, which takes place at longitudinal stress relaxation in the thicker layer of boron nitride.

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Funding

This study was carried out in the framework of a state task for the Osip’yan Institute of Solid-State Physics, Russian Academy of Sciences.

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Authors and Affiliations

  1. Osip’yan Institute of Solid-State Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    A. S. Brichkin, G. M. Golyshkov & A. V. Chernenko

Authors
  1. A. S. Brichkin
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  2. G. M. Golyshkov
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  3. A. V. Chernenko
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Correspondence to A. V. Chernenko.

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The authors declare that they have no conflicts of interest.

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Translated by V. Isaakyan

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Brichkin, A.S., Golyshkov, G.M. & Chernenko, A.V. Influence of the Encapsulating Layer Thickness on the Quality of MoSe2-Based Heterostructures. J. Exp. Theor. Phys. 136, 760–764 (2023). https://doi.org/10.1134/S106377612306002X

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  • DOI: https://doi.org/10.1134/S106377612306002X

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