Patent ID: 8530060
Filing Date: 2013-09-10
Classification: H01L

Abstract:
1. A light-emitting element comprising: an anode; a cathode; a hole-transporting layer and an electron-transporting layer between the anode and the cathode; and a layer including an organic compound between the hole-transporting layer and the electron-transporting layer, wherein the layer including an organic compound at least includes a layer serving as a light-emitting layer in which a first layer, a second layer, a third layer, and a fourth layer are stacked in that order over the anode, wherein the first layer includes a first light-emitting substance, wherein the second layer includes a second organic compound and a second light-emitting substance, wherein the third layer includes a third organic compound and a third light-emitting substance, wherein the fourth layer includes a fourth organic compound and a fourth light-emitting substance, wherein emission peak wavelengths of the first light-emitting substance and the fourth light-emitting substance are shorter than an emission peak wavelength of the third light-emitting substance, wherein the emission peak wavelength of the third light-emitting substance is shorter than an emission peak wavelength of the second light-emitting substance, wherein the fourth organic compound includes 9−[4−(10-phenyl-9-anthryl)phenyl]−9 wherein the first layer does not include the 9−[4−(10-phenyl-9-anthryl)phenyl]−9