Abstract
The solid-state method was utilized to prepare a series of orange-red-emitting Sm3+-doped Ba2Gd8(SiO4)6O2 phosphors. The X-ray powder diffraction patterns indicated that the synthesized phosphors had a pure hexagonal phase. X-ray energy dispersive spectroscopy studies confirmed the elemental composition and distribution of the different elements present in the Ba2Gd8 (SiO4) 6O2: Sm3+ powder. The Sm3+-doped Ba2Gd8 (SiO4) 6O2 phosphors exhibited bright luminescence under 407 nm excitation, with a primary peak at 600 nm. Spectral analysis showed that the Sm3+-doped Ba2Gd8 (SiO4) 6O2 phosphors emitted bright orange-red light. Concentration quenching was detected in Sm3+-doped Ba2Gd8(SiO4)6O2 phosphors with a 0.03 mol% concentration of Sm3+ ions because of the multipolar interaction between the two closest Sm3+ ions. The effective orange-red emission suggests the use of Sm3+-doped Ba2Gd8(SiO4)6O2phosphors for white light-emitting diodes.
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