Patent ID: 8227981
Filing Date: 2012-07-24
Classification: H01K,H01L

Abstract:
1. A light-emitting device comprising: an organic layer which is interposed between a first electrode and a second electrode and in which a first light-emitting layer and a second light-emitting layer emitting light of single colors or two or more different colors in a visible wavelength region are sequentially included at mutually separated positions in that order in a direction from the first electrode to the second electrode; a first reflective interface which is provided on the side of the first electrode so as to reflect light emitted from the first light-emitting layer and the second light-emitting layer to be emitted from the side of the second electrode; and a second reflective interface and a third reflective interface which are sequentially provided on the side of the second electrode at mutually separated positions in that order in a direction from the first electrode to the second electrode, wherein an optical distance between the first reflective interface and a luminescent center of the first light-emitting layer is set so that light having a central wavelength of an emission spectrum of the first light-emitting layer is reinforced through interference between the first reflective interface and the luminescent center of the first light-emitting layer, wherein an optical distance between the first reflective interface and a luminescent center of the second light-emitting layer is set so that light having a central wavelength of an emission spectrum of the second light-emitting layer is reinforced through interference between the first reflective interface and the luminescent center of the second light-emitting layer, and wherein the reflection of light by the second reflective interface and the reflection of light by the third reflective interface occur so that light having wavelengths shifted by an amount of +15 nm or more and −15 nm or less from at least one of the central wavelength of the emission spectrum of the first light-emitting layer and the central wavelength of the emission spectrum of the second light-emitting layer is weakened.