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On the Synthesis and Photoluminescence and Cathodoluminescence Properties of CdSe, CdTe, PbS, InSb, and GaAs Colloidal Quantum Dots

  • MICROCRYSTALLINE, NANOCRYSTALLINE, POROUS, AND COMPOSITE SEMICONDUCTORS
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Abstract

Quantum dots of the group of wide-gap and narrow-gap semiconductors are synthesized and investigated under identical conditions, which makes it possible to perform the comparative analysis and modeling of the mechanisms of radiative recombination and luminescence, for which a stable exciton bond between the electron and hole has an important role. Exciton states are unstable for quantum dots without a shell and narrow-gap semiconductors, which leads to a substantial decrease in the probability of radiative recombination and, correspondingly, the quantum yield of luminescence. The experimental values of the spectral position of the luminescence maximum for quantum dots with clear manifestation of the exciton recombination mechanism noticeably shift to the long-wavelength region with respect to the calculated ones. In calculations and analysis, we use the effective electron mass for bulk semiconductors. The observed good correspondence of the calculated values of the maximum and spectral band with the experiment can mean that quantum dots have a long-range order crystalline structure similar to that one observed in single crystals and polycrystals.

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Funding

This study was supported by the Russian Foundation for Basic Research, project nos. 17-07-00407-a and 18-07-00586-a.

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Authors and Affiliations

  1. Saratov State University, 410012, Saratov, Russia

    M. I. Shishkin

  2. OOO NPP “Volga”, 410056, Saratov, Russia

    N. D. Zhukov & A. A. Khazanov

  3. Research Institute of Applied Acoustics, 141981, Dubna, Russia

    D. V. Kryl’skiy

Authors
  1. N. D. Zhukov
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  2. D. V. Kryl’skiy
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  3. M. I. Shishkin
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  4. A. A. Khazanov
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Corresponding author

Correspondence to M. I. Shishkin.

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The authors declare that they have no conflict of interest.

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Translated by N. Korovin

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Zhukov, N.D., Kryl’skiy, D.V., Shishkin, M.I. et al. On the Synthesis and Photoluminescence and Cathodoluminescence Properties of CdSe, CdTe, PbS, InSb, and GaAs Colloidal Quantum Dots. Semiconductors 53, 1082–1087 (2019). https://doi.org/10.1134/S1063782619080232

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  • DOI: https://doi.org/10.1134/S1063782619080232

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