Patent ID: 8796676
Filing Date: 2014-08-05
Classification: H01L

Abstract:
1. A tandem white organic light emitting device comprising: a first electrode and a second electrode opposing each other; a charge generation layer formed between the first electrode and the second electrode; a first stack disposed between the first electrode and the charge generation layer, the first stack comprising a first light emitting layer emitting blue light; and a second stack disposed between the charge generation layer and the second electrode, the second stack comprising a second light emitting layer including one or more hosts doped with a phosphorescent dopant emitting light having a longer wavelength than blue light, wherein the charge generation layer comprises an n-type charge generation layer doped with a metal and a p-type charge generation layer made of an organic material and wherein an amount of metal doped in the n-type charge generation layer is 2% to 8% of the total volume of the n-type charge generation layer.