DOI: https://doi.org/10.30970/jps.02.421
REFLECTION SPECTRA AND LUMINESCENCE-KINETIC PROPERTIES OF SOME PEROVSKITE-LIKE CRYSTALS
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Journal of Physical Studies 2(3), 421–426 (1998)
DOI: https://doi.org/10.30970/jps.02.421 REFLECTION SPECTRA AND LUMINESCENCE-KINETIC PROPERTIES OF SOME PEROVSKITE-LIKE CRYSTALS |
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S. V. Myagkota
The Ivan Franko State University of Lviv,
8 Kyrylo i Mefodii Str., Lviv, UA–290005, Ukraine
The reflection spectra of the RbPbCl$_3$, RbPb$_2$Cl$_5$, and KPb$_2$Cl$_5$ crystals in the fundamental absorption region ($E$=2–12 eV) at $T$=300 K and thermal evolution of the luminescence spectra in the temperature range of 4.4–300 K were investigated. The structure of exciton reflection in the RbPb$_2$Cl$_5$ and KPb$_2$Cl$_5$ crystals corresponds to four nonequivalent positions of the Pb$^{2+}$–ions in a unit cell. Radiative relaxation of intrinsic excitations in the crystal under study are considered to occur through the emission of self–trapped excitons.