PHOSPHOR AND LIGHT-EMITTING DEVICE BY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a silicate salt-based phosphor capable of emitting a green-yellow-orange-colored light having a single light-emitting band at 520-600 nm wave length range and a good color purity on exciting it by the light of 360-500 nm wave length and also having a reduced toxicity.

SOLUTION: This phosphor consisting of an alkaline earth metal silicate salt and activated by Eu2+is characterized by containing at least one kind of an element selected from La, Gd, Cs and K in addition to the alkaline earth metal element.

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