1：Experimental Design and Method Selection:

The study used a high-temperature solid-phase reaction method to synthesize phosphors, with crystal structure analysis via Rietveld refinement, photoluminescence measurements, and LED device fabrication to assess performance. Theoretical models for energy transfer and site occupation were applied.

2：Sample Selection and Data Sources:

Samples were prepared with varying concentrations of Ce3+ and Tb3+ ions in the CAMSO host, using pure reactants (99.99% purity). Data were collected from XRD, emission/excitation spectra, decay lifetime measurements, and LED device tests.

3：99% purity). Data were collected from XRD, emission/excitation spectra, decay lifetime measurements, and LED device tests. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included a high-temperature tube furnace, powder X-ray diffraction instrument (Cu Kα radiation, 40 kV, 30 mA), Jobin Yvon FluoroMax-4 spectrofluorometer, HORIBA pulsed laser (370 nm), and an integrating sphere system (HAAS-1200, Everfine Photo-E-Info Co. Ltd). Materials were CaCO3, Al2O3, MgO, SiO2, Ce2(CO3)3, Tb4O7, Li2CO3, and commercial CaAlSiN3:Eu2+ phosphor.

4：Experimental Procedures and Operational Workflow:

Reactants were mixed, ground with ethyl alcohol, sintered at 1350°C for 2 hours under 10%H2/90%N2 atmosphere, then ground into powders. LED devices were fabricated by mixing phosphor powders with glue, applying to chips, and curing at 120°C. Measurements were performed at room temperature unless specified.

5：Data Analysis Methods:

Data were analyzed using Rietveld refinement (GSAS program), Gaussian peak fitting for emission spectra, energy transfer efficiency calculations, Arrhenius equation for thermal stability, and CIE chromaticity coordinates for color analysis.