Synthesis design of Y₃Al₅O₁₂: Ce³⁺ phosphor for fabrication of ceramic converter in automotive application

A cellulose-assisted, liquid-phase precursor (LPP) was used to synthesize a YAG phosphor radiating near 530 nm with a particle size of 400 nm, which may be implemented in many applications. The mixture of the materials was homogeneous, and the cellulose-assisted LPP method involved a liquid-phase reaction at a lower temperature compared to a solid-state reaction (SSR). The reaction was performed at 1200, 1300 and 1400 °C, and the composition ratio of the samples was controlled based on yttrium (L1: 2.7, L2: 2.8, L3: 2.9, L4: 2.95, and L5: 3.1 M). ∼400 nm particles were obtained at 1200 °C and ∼1 μm at 1300 °C. At 1200 °C, the PL intensity was the highest in the Y_3.1Al₅O₁₂ sample. At 1300 and 1400 °C, the strongest intensity was evident in the Y_2.9Al₅O₁₂ sample. The XRD patterns for all temperatures showed a YAG phase in JCPDS.