P. A. Dementev, M. S. Dunaevskii, L. B. Matyshkin, A. V. Nezhdanov, A. N. Smirnov, D. O. Filatov, “Study of CsPbBr<nobr>$_{3}$</nobr> nanocrystals and their agglomerates by combined scanning probe microscopy and optical spectrometry”, Optics and Spectroscopy, 2018, Volume 125, Issue 6,Pages <nobr>752

This article is cited in 2 papers

Spectroscopy of condensed matter

Study of CsPbBr$_{3}$ nanocrystals and their agglomerates by combined scanning probe microscopy and optical spectrometry

P. A. Dementev^a, M. S. Dunaevskii^a, L. B. Matyshkin^b, A. V. Nezhdanov^c, A. N. Smirnov^a, D. O. Filatov^c

^a Ioffe Institute, St. Petersburg
^b St. Petersburg State Electrotechnical University LETI, 197376, St. Petersburg, Russia
^c Nizhny Novgorod State University, 603950, Nizhny Novgorod, Russia

Abstract: The electric, piezoelectric, and optical properties of colloidally synthesized CsPbBr$_{3}$ nanocrystals (NCs) are studied by combined scanning probe microscopy and optical spectrometry. It is found that the CsPbBr$_{3}$ 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 ($\sim$ 20–30 mV) and contain a small amount of charges. It is shown that piezoelectric modulus $d_{33}$ of CsPbBr$_{3}$ NC agglomerates does not exceed 1 pm/V.

Received: 26.07.2018

DOI: 10.21883/OS.2018.12.46934.241-18