LARGE-AREA ULTRATHIN SINGLE CRYSTAL AND RAPID GENERATION METHOD THEREFOR

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A large-area ultrathin single crystal generation method, comprising : using phosphor powder and an oxide substrate as raw materials, or using phosphor powder, an oxide substrate and a rare earth oxide as raw materials, preparing a flow die, and then generating a crystal, obtaining said single crystal. Also disclosed are a single crystal prepared by this method, and applications of said single crystal. The present method has the following advantages : distribution of light-emitting ion distribution is even and concentration thereof can be controlled, there is a large area and ultrathin sheet, the generation period is very short, generation temperature is low, costs are low and production volume is high.