Silica nanoparticles assisted Ba₂SiO₄:Eu²⁺-a bluish-green emitting remote phosphor for white light application

Silica nanoparticles were used to develop a bluish-green emitting Ba₂SiO₄:Eu²⁺ phosphor, demonstrating their potential for white light applications. The phosphor showed a 48% enhancement of emission intensity compared to conventional silica-assisted phosphors. The use of silica nanoparticles as a precursor could lead to the creation of a more homogeneous distribution of cations and dopant ions. This uniform distribution could facilitate the proper infusion of dopants into the crystal host, resulting in improved emission. The phosphor exhibited high thermal stability, with 56% of its luminescence intensity maintained even at 190 °C compared to room temperature. To reduce thermal stress, a flexible remote phosphor has been developed successfully using optimized silica nanoparticles assisted Ba₂SiO₄:Eu²⁺ phosphor.