The electronic structure, site occupancy and luminescent properties of Ce3+-activated Li2Ca2Si2O7 blue phosphor

Rare earth activated lithium-containing alkaline earth silicates is an intensely studied topic in the fields of luminescent materials . In this study, a cerium-activated lithium-silicate blue phosphor, Li 2 Ca 2 Si 2 O 7 :Ce 3+ , was explored using structural computational simulations and systematic experiments. The Li 2 Ca 2 Si 2 O 7 :Ce 3+ phosphor can be efficiently excited by near-ultraviolet and cathode ray light sources . According to the spectroscopic redshift theory, time-resolved photoluminescence (TRPL) and cathodoluminescence (CL) spectra, it is determined that the broad emission of Li 2 Ca 2 Si 2 O 7 :Ce 3+ comes from two different luminescent centers. In addition, Li 2 Ca 2 Si 2 O 7 :Ce 3+ exhibits strong blue emission at ~415 nm with high quantum yield and stable emission under high temperature and continuous electron beam bombardment . Therefore, this study provides a new insight into developing new high-efficiency and high-purity trichromatic phosphors.