| 摘要 |
<p>A white light emitting device according to the embodiment includes: a light emitting element which has a peak wavelength in a wavelength range of 430 nm or more and 460 nm or less; and a fluorescent layer which is formed on the light emitting element and contains a red fluorescent material and a green-yellow fluorescent material. Further, when a peak wavelength of a fluorescent material, a full width at half maximum of light emitted from a fluorescent material, an effective wavelength width of a spectrum for light emitted from a fluorescent material, and an external quantum efficiency of a fluorescent material are respectively denoted by »p, FWHM, EWW, and ·, the red fluorescent material has the characteristics of: 625 nm ‰¤ »p ‰¤ 635 nm; 15 nm ‰¤ EWW ‰¤ 45 nm; and 40% ‰¤ · ‰¤ 75%, and the green-yellow fluorescent material has the characteristics of: 545 nm ‰¤ »p ‰¤ 565 nm; 90 nm ‰¤ FWHM ‰¤ 125 nm; and 70% ‰¤ · ‰¤ 90%.</p> |
