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Study of CsPbBr3 Nanocrystals and Their Agglomerates by Combined Scanning Probe Microscopy and Optical Spectrometry

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Abstract

The electric, piezoelectric, and optical properties of colloidally synthesized CsPbBr3 nanocrystals (NCs) are studied by combined scanning probe microscopy and optical spectrometry. It is found that the CsPbBr3 NCs have a cubic shape with an edge length of 10 nm. When deposited on a substrate, these NCs gather into faceted agglomerates up to several hundred nanometers in size. It is shown that the photoluminescence spectra contain, in addition to the main narrow edge-luminescence line (2.47 eV), two additional broad defect lines lying 40 and 200 meV lower than the main line. The NC agglomerates have a low surface potential (~20–30 mV) and contain a small amount of charges. It is shown that piezoelectric modulus d33 of CsPbBr3 NC agglomerates does not exceed 1 pm/V.

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ACKNOWLEDGMENTS

This work was supported by the Russian Foundation for Basic Research (project no. 17-32-50107).

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Authors and Affiliations

  1. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia

    P. A. Dement’ev, M. S. Dunaevskii & A. N. Smirnov

  2. Nizhny Novgorod State University, 603950, Nizhny Novgorod, Russia

    A. V. Nezhdanov & D. O. Filatov

  3. St. Petersburg State Electrotechnical University LETI, 197376, St. Petersburg, Russia

    L. B. Matyushkin

Authors
  1. P. A. Dement’ev
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  2. M. S. Dunaevskii
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  3. L. B. Matyushkin
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  4. A. V. Nezhdanov
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  5. A. N. Smirnov
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  6. D. O. Filatov
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Correspondence to P. A. Dement’ev.

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Translated by M. Basieva

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Dement’ev, P.A., Dunaevskii, M.S., Matyushkin, L.B. et al. Study of CsPbBr3 Nanocrystals and Their Agglomerates by Combined Scanning Probe Microscopy and Optical Spectrometry. Opt. Spectrosc. 125, 858–863 (2018). https://doi.org/10.1134/S0030400X18120044

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  • DOI: https://doi.org/10.1134/S0030400X18120044

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