Journal of Physical Studies 6(2), 213–217 (2002)
DOI: https://doi.org/10.30970/jps.06.213

SPECTRAL-LUMINESCENCE PROPERTIES OF Pb-BASED AGGREGATES DISPERSED IN THE CsBr MATRIX

S. V. Myagkota^{1}, A. V. Gloskovsky², I. V. Stefanskii², I. V. Garapyn², V. M. Gaba^{3}
^{1}Lviv S. Gzhytskii Academy of Veterinary Medicine,
50 Pekarska Str., Lviv, UA–79010, Ukraine
²Ivan Franko National University of Lviv, Physics Faculty,
8 Kyrylo i Mefodii Str., Lviv, UA–79005, Ukraine
^{3}National University ‟Lvivska Polytechnika",
12 Bandery Str., Lviv, UA–79012, Ukraine

Spectral-luminescence properties of Pb-based aggregates, created under high temperature annealing of CsBr:Pb$X_{2}$ ($X$ = F, Cl, Br, I) (C$_{{\rm Pb}X_2}=1$ mol.\%) crystals under photo- and X-ray excitation were studied. The formation of Cs$_{4}$PbBr$_{6}$ or Cs$_{4}$PbBr$_{6-x}$F$_{x}$, Cs$_{4}$PbBr$_{6-x}$I$_{x}$ and CsPbBr$_{3}$ nanocrystals dispersed in the CsBr matrix was registered. Being pulse X-ray excited, radiative relaxation of high-energy electron-hole pairs of CsBr – 1 mol.\% PbCl$_{2}$ or PbBr$_{2}$ crystal is realized through radiative decay of self-trapped excitons of the CsBr matrix, Cs$_{4}$PbBr$_{6}$ nanocrystals and localized excitons of CsPbBr$_{3}$ nanocrystals.

PACS number(s): 78.55.Hx, 78.40.Ha, 71.35.Cc