Preparation and its luminescent properties of AlPO4:Eu3+ phosphor for w-LED applications

Orange-reddish-emitting phosphor AlPO4:Eu3+ were fabricated by solid-state reactions at high temperature. X-ray diffraction analysis revealed that AlPO4 doped with 3 mol% of Eu3+ (AlPO4:0.03Eu3+) was pure orthorhombic phase. The photoluminescence study shows that the intensity of magnetic dipole transition (5D0 → 7F1) at 594 nm dominates over that of electric dipole transition (5D0 → 7F2) at 613 nm. The optimum concentration of Eu3+ for the highest luminescence is found to be 3 mol%. The PL excitation spectrum is composed of CTB of Eu–O and excitation lines of Eu3+ ions. The strongest excitation lines appeared at 392 nm. The color coordinates, quantum yield and lifetime for AlPO4:0.03Eu3+ were measured. All the spectrum features indicate that AlPO4:Eu3+ might be a promising phosphor for display devices or w-LEDs.

► The polycrystalline powder of AlPO4 is easy synthesis, stability and low cost.
► we synthesized AlPO4:Eu3+ phosphor and investigated its luminescent properties.
► We find that the PL emission spectrum shows strong orange-reddish emission lines.
► The color coordinates, quantum yield and lifetime for AlPO4:0.03Eu3+ were measured.
► We conclude that AlPO4:Eu3+ might be a promising phosphor for w-LEDs.