Photoluminescence in composites based on polyvinylidene fluoride and filler CaGa$_2$S$_4$:Eu$^{2+}$

O. B. Tagiyev^ab, E. G. Asadov^a, F. A. Kazymova^a, T. D. Ibragimov^a, I. S. Ramazanova^a, A. F. Nuraliev<sup>a

a</sup> Institute of Physics of the Ministry of Science and Education, Baku, Azerbaijan
^b Baku Branch of Lomonosov Moscow State University, Baku, Azerbaijan

Abstract: The excitation and photoluminescence spectra of composites based on PVDF and filler have been measured at room temperature. The photoluminescence spectra were analyzed at different concentrations of Eu$^{2+}$ ions. It was found out that positions of PL spectra maxima do not change with an increase in the content of Eu$^{2+}$ ions in the compound and remain $\sim$550 nm at all percentages. Radiation with such a maximum is caused by the $4f^65d^1\to 4f^75d$ electronic transition.

Keywords: photoluminescence, excitation, rare earth element, phosphor, europium.

Received: 14.10.2022
Revised: 21.02.2023
Accepted: 23.02.2023

DOI: 10.21883/PJTF.2023.09.55314.19394

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