Sulfur Oxide Luminescent Material Core-Shell Structure

The patent creates a core-shell composite structure where metal nanoparticles (core) are coated with sulfur oxide luminescent material (shell). This composite structure combines the plasma generation capability of metals with the luminescent properties of sulfur oxide, achieving both chemical stability and high luminescent efficiency. The metal core generates plasma under electron beam irradiation, which then excites the luminescent material shell to emit light.

The invention applies different functional properties to different parts of the structure: the metal nanoparticle core provides plasma generation and energy conversion functions, while the sulfur oxide shell provides luminescent emission and chemical stability. This local differentiation of functions allows each component to optimize its performance for its specific role, resolving the contradiction between stability and efficiency.

The patent replaces the traditional approach of relying solely on rare earth element concentration for luminescent efficiency with a plasma-based energy conversion mechanism. The metal nanoparticle core generates plasma that efficiently transfers energy to the luminescent material, substituting the need for high rare earth content with a more efficient energy conversion pathway. This reduces rare earth element requirements while maintaining or improving luminescent efficiency.

The invention changes the energy conversion parameters by introducing plasma generation through metal nanoparticles. Instead of relying on direct rare earth element excitation, the system uses plasma as an intermediate energy carrier, fundamentally changing how energy is transferred and converted. This parameter change enables high luminescent efficiency with reduced rare earth element content.