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Abstract

A zinc aluminate luminescent material is provided having the general molecular formula of Zn_1-xAl₂O₄:A³⁺_x@Al₂O₃@M_y, wherein A is selected from the group consisting of Cr, Eu, Tb, and Ce; M is selected from at least one of Ag, Au, Pt, Pd and Cu metal nanoparticles; 01-xAl₂O₄:A³⁺_x and the molar mass of Al in Al₂O₃@M_y, 0−2; @ represents coating; the zinc aluminate luminescent material uses M as a core, Al₂O₃ as an inner shell, and Zn_1-xAl₂O₄:A³⁺_x as an outer shell. The zinc aluminate luminescent material is a core-shell structure using at least one of Ag, Au, Pt, Pd and Cu metal nanoparticles as a core, Al₂O₃ as an inner shell, and Zn_1-xAl₂O₄:A³⁺_x as an outer shell. The metallic nanoparticles improve the internal quantum efficiency, thus enabling the zinc aluminate luminescent material to have a relatively high luminous intensity. Moreover, a preparation method of the zinc aluminate luminescent material is also provided.

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