Influence of the technological conditions on the luminescence of Eu3+ ions in Sr2SnO4

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Different synthesis conditions have been used to prepare the stoichiometric compounds of the Sr2−xEuxSnO4 with x = 0.00, 0.01, 0.02 and 0.03. As the 5D0 → 7F0 transition is forbidden by a selection rule of the Judd–Ofelt theory, the J = 0 → J = 0 level gains some intensity from the mixing of J states in the Sr2−xEuxKxSnO4 and Sr1−xEuxSnO4 samples. For Sr2−xEuxSnO4 samples prepared under a slightly reducing atmosphere, the J = 0 → J = 0 transition is split into two peaks, which confirms the substitution of Eu3+ ions for different crystallographic sites.

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