1：Experimental Design and Method Selection:

The study focuses on fabricating carbon dot films using a solvothermal method for carbon dot synthesis and a solution-casting method for film preparation. The rationale is to create films that absorb and convert harmful UV and blue light to safer wavelengths, leveraging the optical properties of carbon dots.

2：Sample Selection and Data Sources:

Carbon dots were synthesized from acetone and deionized water. Films were prepared with polyvinyl alcohol (PVA) and carbon dots at contents of 0, 10, 20, 30, and 40 wt%. Data were obtained from characterization of these materials and application tests on UV, blue, and white LEDs.

3：List of Experimental Equipment and Materials:

Equipment includes magnetic stirrer, autoclave with Teflon liner, membrane filters, dialysis membrane, transmission electron microscope (TEM, HITACHI LTD, H-7500), high-resolution TEM (HR-TEM, JEOL, JEM-2100), X-ray diffractometer (X'PERT PRO), FTIR spectrophotometer (Perkin-Elmer), XPS spectrometer (PHI 5000 VersaProbe), Raman spectroscope, FE-SEM (JSM-6700, JEOL), UV-Vis spectrometer (V-670, JASCO), luminescence spectrophotometer (Photon Technology International), fluorescence spectrophotometer (DARSA PRO-5200), and Ocean Optics detector (HR4000). Materials include acetone, deionized water, PVA (MW = 1500 g/mol), and commercial blue blocking filter (HD.CRYSTAL).

4：0). Materials include acetone, deionized water, PVA (MW = 1500 g/mol), and commercial blue blocking filter (HD.CRYSTAL). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Carbon dots were synthesized by heating a mixture of acetone and DI water at 150°C for 10 h, followed by filtration and dialysis. Films were made by dissolving PVA in water, adding carbon dot solutions, casting in petri dishes, and drying at 90°C. Characterization involved structural (TEM, XRD, FTIR, XPS, Raman) and optical (UV-Vis, PL) analyses. Applications tested by measuring spectra of LEDs with films attached.

5：Data Analysis Methods:

Data were analyzed using instrument-specific software for spectral measurements, with blocking ratios calculated from intensity comparisons, and thermal stability assessed using Arrhenius equation.