1：Experimental Design and Method Selection:

A modified hot-injection method was used to synthesize CsPbBr3 NCs in lauryl methacrylate (LMA) solvent, replacing the classic octadecene (ODE) solvent. The NC-LMA solution was directly combined with oligomers (polyester polyurethane acrylates), monomer (isobornyl acrylate, IBOA), and initiator (2,2-Dimethoxy-2-phenylacetophenone, DMPA) for UV polymerization to fabricate NC-polymer composite films without post-processing steps like centrifugation, separation, and dispersion.

2：Sample Selection and Data Sources:

CsPbBr3 NCs were synthesized using precursors including cesium carbonate, oleic acid, oleylamine, lead bromide, and LMA or ODE as solvents. Control films were prepared with various treatments (e.g., adding oleic acid, oleylamine) for comparison.

3：List of Experimental Equipment and Materials:

Materials included Cs2CO3, OA, OAm, LMA, PbBr2, toluene, DMPA, polyester polyurethane acrylates oligomer, IBOA. Equipment included TEM (FEI Tecnai G2 F20), SEM (Hitachi S-3400N), XRD (Bruker AXS D8), UV-Vis spectrophotometer (Shimadzu UV-3600 plus), PL spectrometer (Horiba PTI QuantaMaster 400), XPS (ULVAC-PHI 5000 Versa Probe), FTIR (FTIR-650), xenon lamp for photostability tests, and Konica Minolta Display Color analyzer (CA 310).

4：0). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Synthesis involved preparing cesium-oleate precursor, injecting it into PbBr2 solution in LMA or ODE at 180°C, cooling, and then mixing with oligomer, monomer, and initiator. The mixture was coated on PET substrate and UV-polymerized for 5 minutes. Control films were processed similarly with variations. Characterization included TEM, SEM, XRD, UV-Vis, PL, XPS, FTIR, and stability tests under light, water, and heat.

5：Data Analysis Methods:

PL decay kinetics were fitted with triexponential decay functions to calculate average lifetimes. Radiative and nonradiative decay rates were derived from PLQYs and lifetimes. Statistical analysis of PLQYs and stability data was performed to compare films.