Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

The color-tunable GdCaAl 3 O 7 : RE 3+ (RE = Eu, Tb, Eu@Tb) phosphors were synthesized via an ultrafast sol-gel auto-combustion synthesis method. X-ray diffraction patterns confirmed the forming of tetragonal phase, and scanning electron microscopy images indicated that obtained products presented honeycomb-like structure due to gas releasing during process. luminescent properties, concentration quenching mechanism, energy transfer dynamics, thermal stability product practicability investigated systematically. All characteristic emission doped . Using 50% Tb @3.0% Eu as yellow-emitting in combination with commercial BAM: 2+ blue-emitting a NUV chip can successfully package warm white LED device high color rendering index (CRI, 86.3) low correlated temperature (CCT, 3348 K) was very suitable for near-ultraviolet light-triggered indoor illumination. • Color-tunable prepared by Luminescent dynamics investigated. Energy mechanism effects discussed. Glaring light CRI CCT obtained. Products