FLUORESCENT SUBSTANCE AND LIGHT EMITTING DEVICE

摘要

This invention provides a fluorescent material that has high brightness, causes no significant deterioration in brightness during PDP drive, and has chromaticity y equivalent to BAM:Eu. The fluorescent substance is represented by general formula xAO·y<SUB>1</SUB>EuO·y<SUB>2</SUB>EuO<SUB>3/2</SUB>·DO·zSiO<SUB>2</SUB> wherein A represents at least one element selected from Ca, Sr and Ba; D represents at least one element selected from Mg and Zn; and 2.970 = x = 3.500, 0.001 = y<SUB>1</SUB> + y<SUB>2</SUB> = 0.030, and 1.900 = z = 2.100. The proportion of divalent Eu around the surface of fluorescent substance particles (proportion of divalent Eu element to the total Eu element) is not more than 50% by mole.