In this work, the luminescent properties of three europium salts with various counterions (trifluoroacetate, nitrate and chloride) are studied. Their luminescence excitation spectra at room temperature and in liquid nitrogen have been recorded and studied. Their luminescence lifetime is determined when excited in the UV and visible regions of the spectrum. The influence of counterions and the number of water molecules in the structure of europium salts on their luminescent characteristics is determined.
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