Journal of Physical Studies 25(4), Article 4801 [5 pages] (2021) DOI: https://doi.org/10.30970/jps.25.4801 CONDUCTIVITY OF CsPbBr3 AT AMBIENT CONDITIONS L.-I. I. Bulyk{1,2} , O. T. Antonyak1, Ya. M. Chornodolskyy1 , R. V. Gamernyk1 , T. M. Demkiv1 , V. V. Vistovskyy1 , A. Suchocki2 , A. S. Voloshinovskii1  1Ivan Franko National University of Lviv, 8, Kyrylo & Mefodiy St., Lviv, Ukraine 2Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668, Warsaw, Poland e-mail: tmdemkiv@gmail.com Received 20 August 2021; in final form 10 November 2021; accepted 22 November 2021; published online 22 December 2021

The properties of electrically conductive CsPbBr$_3$ single crystals obtained from the melt have been studied. According to the results of Raman spectra, the covalent bonds in the octahedra [PbBr$_6$]$^{4-}$ have different strengths in different directions. This bond anisotropy promotes the formation of bromine vacancies located along selected crystallographic directions, which become sites of crystal degradation and the formation of Cs$_4$PbBr$_6$ microformations. A potential barrier at the boundary between the Cs$_4$PbBr$_6$ single crystal and the Cs$_4$PbBr$_6$ microformations was found.

Key words: single crystal, electrically conductive, Raman spectra, voltage-current characteristics, microformations.

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