(English version http://link.springer.com/article/10.1007/s11237-014-9344-z) The sol–gel method was used to obtain high-brightness crystal phosphors from SrTiO3: Pr3+ producing more than 1800 cd/m2. A ten-fold increase in the intensity of the main luminescence spectrum band at λ = 617 nm by doping SrTiO3: Pr3+ was achieved by adding a ferric ion coactivator (5 · 10–5 mole %). The results indicated a possible mechanism for the enhancement of the Pr3+ ion luminescence in the presence of the coactivator.