TL and PL Studies On Cubic fluoroperovskite Single Crystal (KMgF3: Eu2+, Ce3+)

The perovskite-like KMgF3 polycrystalline compounds were synthesized by standard solid state reaction technique. Phase purity of the synthesized compounds was analyzed by powder X-ray diffraction technique. Single crystals of (0.2 mol% of EuF3 and CeF3) Co-doped KMgF3 have been grown from melt by using a vertical Bridgman-Stockbarger method. Thermoluminescence (TL) characteristics of KMgF3 samples doped with Eu2+ and Ce3+ have been studied after beta-ray irradiation. At ambient conditions the photoluminescence spectra consisted of sharp line peaked of Eu2+ at 360 nm attributed to the f -> f transition (P-6(7/2) -> S-8(7/2)) could only be observed due to the energy transfer from Ce3+ to Eu2+.