Funct. Mater. 2016; 23 (3): 382-386.

http://dx.doi.org/10.15407/fm23.03.382

Luminescence of PbI2 nanoinclusions in CdI2 crystal lattice

I.M.Bolesta1, V.V.Vistovskyy1, N.V.Gloskovska2, I.M.Rovetskij1

1Ivan Franko Lviv National University, 1 Universytetska Str., 79000 Lviv, Ukraine
2Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, 14b Metrolohichna Str., 03680 Kyiv, Ukraine

Abstract: 

Luminescence spectra of CdI2 crystals with PbI2 inclusions (10-5%) under synchrotron excitation at 8 K are examined in the present work. The spectra of the crystals grown from the melt exhibit luminescence peaks at 2.13 and 2.43 eV which are associated with one-dimensional impurity nanoinclusions near dislocations. In the luminescence spectra of CdI2 crystals synthesized by the method of diffusion from the gas phase the effect of two-dimensional PbI2 nanoinclusions with 2.0 and 2.48 eV bands prevails. A new model of the luminescence center is proposed.

Keywords: 
layered crystals, nanoinclusions, luminescence, synchotron excitation.
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