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Photoluminescence of CdTe/ZnTe Heterostructures with Nominal CdTe Layer Thickness from One to Eight Monolayers Grown by Atomic Layer Deposition

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Abstract

We studied the luminescence of CdTe layers with a nominal thickness of one, two, four, and eight monolayers (MLs) grown by atomic layer deposition in a ZnTe matrix. The layers with a thickness of one and two monolayers exhibit the properties of homogeneous layers, while the layers with a thickness of four and eight monolayers are planar arrays of quantum dots (QDs). The sizes of QDs and their size dispersion increase with an increase in the nominal thickness of the CdTe layer. The shape of the luminescence excitation spectra of the CdTe layer in these samples varies greatly. Depending on the energy distance between the exciton levels of the CdTe layers and the ZnTe matrix, the ratio of the contributions of the ZnTe exciton and charge carriers unbound to the exciton to the energy transfer varies significantly.

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ACKNOWLEDGMENTS

This work was performed using the equipment of the St. Petersburg State University Science Park.

Funding

This work was supported by the St. Petersburg State University (project no. INI 2019 id 36463378) and the National Science Center (Poland) (project no. 2018/30/M/ ST3/00276).

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Authors and Affiliations

  1. St. Petersburg State University, 194034, St. Petersburg, Russia

    V. F. Agekyan, A. Yu. Serov & N. G. Filosofov

  2. Institute of Physics, Polish Academy of Sciences, 02-668, Warsaw, Poland

    G. Karczewski

Authors
  1. V. F. Agekyan
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  2. A. Yu. Serov
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  3. N. G. Filosofov
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  4. G. Karczewski
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Correspondence to V. F. Agekyan.

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The authors declare that they have no conflicts of interest.

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Translated by O. Zhukova

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Agekyan, V.F., Serov, A.Y., Filosofov, N.G. et al. Photoluminescence of CdTe/ZnTe Heterostructures with Nominal CdTe Layer Thickness from One to Eight Monolayers Grown by Atomic Layer Deposition. Phys. Solid State 62, 1056–1059 (2020). https://doi.org/10.1134/S1063783420060025

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  • DOI: https://doi.org/10.1134/S1063783420060025

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