Patent ID: 8729795

Claim:
A light emitting device comprising first to third light emitting elements, the first to third light emitting elements each comprising: a first electrode; a first buffer layer over and in contact with the first electrode, the first buffer layer having a composite material including an organic compound which shows a hole transporting property and molybdenum oxide; a hole transporting layer over the first buffer layer; a light emitting layer over the hole transporting layer, the light emitting layer including a light emitting substance; an electron transporting layer over the light emitting layer; a second buffer layer over the electron transporting layer, the second buffer layer having the composite material; and a second electrode over and in contact with the second buffer layer, wherein one of the first and second electrodes is a reflective electrode and another of the first and second electrodes is a translucent electrode, wherein the first to third light emitting elements emit red light, green light, and blue light, respectively, wherein the second electrode, the hole transporting layer, and the electron transporting layer are shared by the first to third light emitting elements, wherein a part of the hole transporting layer and a part of the electron transporting layer are in contact with each other, wherein the light emitting device further comprises partition walls between the first and second light emitting elements and between the second and third light emitting elements, wherein the partition walls cover edge portions of the first electrodes, and wherein the hole transporting layer is in contact with the partition walls in a region between the first and second light emitting elements and in a region between the second and third light emitting elements.