Patent ID: 7422704
Filing Date: 2008-09-09
Classification: C09K

Abstract:
1. A phosphorescent phosphor comprising a compound having a MAl europium (Eu) doped to said matrix as an activator, and dysprosium (Dy) doped to said matrix as a co-activator; an amount of said doped europium (Eu) being more than 1.5% and not more than 5% in terms of mol % relative to a total mole number of the metal elements expressed by M, europium (Eu) and dysprosium (Dy); an amount of said doped dysprosium (Dy) ranging 0.3≦Dy/Eu≦2 in terms of a molar ratio relative to europium (Eu); a ratio of aluminum (Al) ranging from 2.1 to 2.9 in terms of a molar ratio relative to a total mole number of the metal elements expressed by M, europium (Eu) and dysprosium (Dy); and a ratio of barium (Ba) to M ranging 0.3≦Ba/(Sr+Ba)≦0.2.