Stabilization of light emitting Eu2+ centers inside Ca(Sr)I2:Eu particles in glass ceramics. The preliminary concept of synthesis

Glass ceramics in the form of MI2 :Eu crystalline particles grown in MO-B2O3 glass (M = Ca, Sr, Ba) through recrystallization from the alloyed melt were fabricated. Eu2+ ions were detected in the CaI2 and SrI2 crystalline particles (not in the BaI2) inside the corresponding glasses. Some amount of Eu2+ centers are expected to originate from the MO-B2O3 glass hosts as well. This was confirmed by correlated electron paramagnetic resonance (EPR), photo- and radioluminescence (PL, RL) measurements. Peculiarities of the Eu2+ distribution and incorporation into the glass ceramics samples as well as charge and energy transfer properties are discussed in detail. Optimal conditions leading to the enhancement of the Eu2+ emission from the CaI2 and SrI2 crystallites inside the glasses were determined.

Automated summary

Through experiments, it has been confirmed that glass ceramics containing MI2:Eu crystalline particles, with M = Ca, Sr, and Ba, have been formed in MO-B2O3 glass, with the source of Eu2+ ions originating from the MO-B2O3 glass hosts. The distribution of Eu2+ and its properties in the glass ceramics were studied, and the optimal conditions leading to enhanced emission of Eu2+ in CaI2 and SrI2 crystals inside the glasses were determined.