Optical properties of SrAl2O4: Eu2+ phosphor in glass

• The green persistent luminescence of PiG was disappeared.
• The concentration of the electron traps is responsible for the long afterglow.
• The 4f65d → 4f7 transition of Eu2+ was influenced by the surrounding environment.

Phosphor-in-glass (PiG) typed robust color converters were fabricated using pb-free silicate glasses for luminescence materials applications. The PiG based on a SiO2–B2O3–BaCO3 ternary system and SrAl2O4: Eu2+ phosphor showed good transparency reached 99.50%, even if the GTP ratio is 25:1. By simply changing the mixing ratio of glass to SrAl2O4: Eu2+ phosphor, the emission color of PiG can be controlled from blue to bluish green. The results reveal that the luminescence properties of SrAl2O4: Eu2+ distinct from the phosphor in glass significantly. These suggest that PiG could provide potential application in a variety of luminescence materials.