RARE EARTH DOPED CASO4 PHOSPHORS HAVING HIGH EFFICIENCY UNDER THE VACUUM ULTRAVIOLET RAY EXCITATION

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The present invention relating to phosphors based on Rare Earth doped CaSO4, provides CaSO4 phosphor of vacuum ultraviolet excitation type represented by the following formula, Ca 1-a-b XaRE b SO 4………….. (α) wherein 0.0001

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