1：Experimental Design and Method Selection:

The study involved the synthesis of CdSe/CdS core/crown NPLs and the fabrication of an inverted structure LED device. The methodology included the preparation of precursors, synthesis of core-only CdSe nanoplatelets, synthesis of core/crown CdSe/CdS nanoplatelets, and the preparation of inverted structure LED devices.

2：Sample Selection and Data Sources:

The samples used were CdSe/CdS core/crown NPLs. Data was collected through absorption and photoluminescence spectra, TEM images, and device performance characterization.

3：List of Experimental Equipment and Materials:

Chemicals included cadmium nitrate, sodium myristate, cadmium acetate dihydrate, sulfur, 1-octadecene, oleic acid, selenium, polyvinyl pyrrolidone (PVP), 4,4-N,N’-Dicarbazole-1,1’-biphenyl (CBP), dimethyl sulfoxide (DMSO), methanol, ethanol, n-hexane, toluene, and tri-n-octylphosphine (TOP). Equipment included a three-neck flask, centrifuge, spin-coater, and evaporation chamber.

4：Experimental Procedures and Operational Workflow:

The synthesis involved the preparation of cadmium(myristate)2 and CdS precursor solution, synthesis of core-only CdSe nanoplatelets, synthesis of core/crown CdSe/CdS nanoplatelets, and the fabrication of LED devices with a PVP layer to improve performance.

5：Data Analysis Methods:

The performance of the fabricated devices was characterized by measuring current density, voltage, luminance, current efficiency, and external quantum efficiency. The color gamut was calculated based on the CIE 1931 color coordinates.