LIGHT-EMITTING DEVICE INCLUDING PHOTOLUMINESCENT LAYER

摘要

A light-emitting device includes a photoluminescent layer and a light-transmissive layer. At least one of the photoluminescent layer and the light-transmissive layer has a submicron structure including at least two periodic structures. Light emitted from the photoluminescent layer includes first light having a wavelength λa in air and second light having a wavelength λb in air. The at least two periodic structures include a first periodic structure having a first period pa that satisfies λa/nwav-a

主权项

1. A light-emitting device comprising:
a photoluminescent layer that has a first surface perpendicular to a thickness direction thereof and emits light containing first light and second light, an area of the first surface being larger than a sectional area of the photoluminescent layer perpendicular to the first surface; and a light-transmissive layer located on the photoluminescent layer, wherein at least one of the photoluminescent layer and the light-transmissive layer has a submicron structure including at least two periodic structures having at least projections or recesses arranged perpendicular to the thickness direction of the photoluminescent layer, at least one of the photoluminescent layer and the light-transmissive layer has a light emitting surface perpendicular to the thickness direction of the photoluminescent layer, the first light and the second light being emitted from the light emitting surface, the first light has a wavelength λa in air, the second light has a wavelength λb in air, the at least two periodic structures include a first periodic structure having a first period pa that satisfies λa/nwav-a