Patent ID: 9000458
Filing Date: 2015-04-07
Classification: H01L

Abstract:
1. A light-emitting device comprising at least three light-emitting elements, each of the three light-emitting elements comprising: an electrode having a reflective property; a stacked structure over the electrode having a reflective property, the stacked structure comprising: an electrode having a light-transmitting property over the second light-emitting layer, wherein an optical path length between the electrode having a reflective property and the first light-emitting layer is one-quarter of a peak wavelength of an emission spectrum of the first light-emitting layer, wherein an optical path length between the electrode having a reflective property and the second light-emitting layer is three-quarters of a peak wavelength of an emission spectrum of the second light-emitting layer, wherein the first layer comprising a first compound, a second compound, and a phosphorescent compound, wherein the second layer comprising the first compound and the phosphorescent compound, wherein the three light-emitting elements are adjacent to each other, and wherein the stacked structure is continued from one of the three light-emitting elements to the adjacent light-emitting element.