Influence of Ce3+ Ions on the Photoluminescence Properties of Eu3+ Doped GdAl3(BO3)4 Phosphors

Ce 3+ /Eu 3+ codoped GdAl 3 (BO 3 ) 4 phosphors were synthesized by a wet-chemical method, and their luminescence properties under ultraviolet (UV) and vacuum ultraviolet (VUV) excitation were investigated. Upon excitation both by UV and VUV light, the GdAl 3 (BO 3 ) 4 : Eu 3+ phosphors show intense emissions at 588, 613, 650 and 693 nm, which are associated with the typical 5 D 0 - 7 F J (J = 1–4) transitions of Eu 3+ , respectively. The presence of Ce 3+ results in an enhancement of Eu 3+ emission intensity, especially the red 5 D 0 - 7 F 2 transition at 613 nm of Eu 3+ upon UV excitation, indicating that energy transfer happens from Ce 3+ to Eu 3+ in these phosphors.