1：Experimental Design and Method Selection:

The study employed a simple successive ionic layer adsorption and reaction (SILAR) method to encapsulate CsPbBr3 QDs into dual-shell hollow SiO2 spheres. The hierarchical dual-shell structures were designed to anchor CsPbBr3 QDs on the interior of the SiO2 spheres while keeping the outside surface undisturbed.

2：Sample Selection and Data Sources:

The samples included CsPbBr3 QDs encapsulated in dual-shell hollow SiO2 spheres with varying ratios of APTES/TEOS (0:10, 2:8, 5:5, or 10:0).

3：0). List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Chemicals such as cesium carbonate, lead(II) bromide, oleic acid, oleylamine, tetraethyl orthosilicate (TEOS), aminopropyltriethoxysilane (APTES), and others were used. Equipment included X-ray powder diffraction (XRD), Fourier transformation infra-red (FTIR) spectrometer, field emission scanning electron microscope (FE-SEM), Transmission electron microscope (TEM), UV?visible diffuse reflectance spectroscopy, fluorescence spectrometer, and others.

4：Experimental Procedures and Operational Workflow:

The dual-shell hollow SiO2 spheres were prepared using a hard-template method. CsPbBr3 QDs were then encapsulated into these spheres via the SILAR method. The optical properties, stability against light and heat, and application in white LEDs were evaluated.

5：Data Analysis Methods:

The data were analyzed using various techniques including XRD, FTIR, TEM, UV?visible spectroscopy, and photoluminescence spectroscopy to assess the structural, morphological, and optical properties of the encapsulated QDs.