| 摘要 |
<p>The present invention relates to a light emitting device comprising:
a first light emitter emitting light of from 350 to 415 nm and
a second light emitter emitting visible light by exposure to the light from the first light emitter, wherein said second light emitter comprises a phosphor having a crystal phase having a chemical composition of the following formula [3]:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ M 5 j Eu k M 6 l M 7 m O n €ƒ€ƒ€ƒ€ƒ€ƒ[3]
(wherein, M 5 represents a metal element comprising at least one element selected from the group consisting of Ba, Sr and Ca in a total amount of 90 mol% or greater, M 6 represents a metal element comprising at least one element selected from the group consisting of Mg and Zn in a total amount of 90 mol% or greater, M 7 represents a metal element comprising at least one element selected from the group consisting of Si and Ge in a total amount of 90 mol% or greater, j stands for a number satisfying 2.5‰¤j‰¤3.3, k stands for a number satisfying 0.0001‰¤k‰¤1.0, I stands for a number satisfying 0.9‰¤l‰¤1.1, m stands for a number satisfying 1.8‰¤m‰¤2.2 and n stands for a number satisfying 7.2‰¤n‰¤8.8).</p> |
