PHOSPHOR FOR VACUUM ULTRAVIOLET-EXCITABLE LUMINOUS ELEMENT

摘要

PROBLEM TO BE SOLVED: To obtain a red light emitting phosphor for a vacuum ultraviolet- excitable element such as a plasma display panel(PDP) good in luminous efficiency and the vacuum ultraviolet-excitable element using the phosphor. SOLUTION: (1) This phosphor for a vacuum ultraviolet-excitable luminous element is characterized by being represented by the general formula: M4 Gd1-aEuaO(BO3)3 (0.003<=a<=0.5; and M is one or more alkaline earth metal elements selected from Ca, Sr and Ba). (2) The vacuum ultraviolet-excitable luminous element is characterized as comprising the phosphor descried in the above (1).