1：Experimental Design and Method Selection:

The films were fabricated using a sol–gel dip-coating technique followed by a hot water treatment. The combination of these methods was chosen to achieve the desired microstructural changes for antireflective and luminescent properties.

2：Sample Selection and Data Sources:

Silica glass substrates were used for film deposition. The coating solutions were prepared with specific molar ratios of Ca2+:Eu3+:Mo6+:Al3+ and included silver nanoparticles for some samples.

3：List of Experimental Equipment and Materials:

Equipment included a drying oven, muffle furnace, X-ray diffractometer (Bruker AXS D8-02), UV-visible spectrophotometer (JASCO V-670), spectrofluorophotometer (JASCO FP-6500), FESEM (Hitachi S-4700), and TEM (Philips/FEI TECNAI F20). Materials included (NH4)6Mo7O24·4H2O, citric acid, ethanol, Ca(NO3)2·4H2O, Eu(NO3)3·6H2O, Al(NO3)3·9H2O, polyethylene glycol (PEG10000), deionized water, AgNO3, and trisodium citrate.

4：0). Materials included (NH4)6Mo7O24·4H2O, citric acid, ethanol, Ca(NO3)2·4H2O, Eu(NO3)3·6H2O, Al(NO3)3·9H2O, polyethylene glycol (PEG10000), deionized water, AgNO3, and trisodium citrate. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The coating solution was dip-coated on silica glass substrates, dried at 90°C, and annealed at 700°C. The process was repeated for multiple layers. Some samples underwent hot water treatment at 80°C for 30 minutes.

5：Data Analysis Methods:

XRD for crystal structure identification, UV-visible spectrophotometry for optical transmission and absorption spectra, PL spectroscopy for luminescence properties, and FESEM/TEM for microstructure observation.