Citric based sol-gel synthesis and photoluminescence properties of Eu³⁺ doped NaSrBo₃ phosphors

This paper reports a low-cost NaSrBO₃: Eu³⁺ red phosphor. It was synthesized by sol-gel method. The effects of preparation conditions and doping concentrations on the optical properties were investigated. The structure, photoluminescence properties, thermal stability of Eu³⁺-doped NaSrBO₃ were examined. NaSrBO₃: Eu³⁺ emits a bright red color centered at 611 nm, which originates from⁵D₀-⁷F₂ transition of Eu³⁺. The PL intensity reaches the maximum at 2at.%. The prepared NaSrBO₃: Eu³⁺ phosphor shows a better thermal stability under high temperature.