Patent ID: 9117977
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A light emitting device comprising: an excitation light source element that emits excitation light; a substrate that faces the excitation light source element; a fluorescent layer located on the substrate, the fluorescent layer being excited by the excitation light to emit fluorescence; an optical reflection body disposed on a side surface of the fluorescent layer, the side surface extending in a direction parallel to a stacking direction of the substrate and the fluorescent layer; a low-refractive-index material layer disposed between the fluorescent layer and the substrate, the low-refractive-index material layer having a refractive index lower than that of the substrate; and a wavelength-selective layer that transmits at least excitation light in a peak wavelength region of a wavelength range of the excitation light and reflects at least fluorescence in a peak wavelength region of a wavelength range of the fluorescence emitted from the fluorescent layer, wherein the fluorescent layer has an incidence surface from which the excitation light enters, the incidence surface facing the excitation light source element, and the wavelength-selective layer is disposed on the incidence surface.