Patent ID: 8610114

Claim:
A radiation emitting device comprising: a first electrode, which emits first charge carriers having a first charge during operation; a first charge carrier transporting layer, which comprises a fluorescent substance and is arranged on the first electrode; a second charge carrier transporting layer, which contains a phosphorescent substance and is arranged on the first charge carrier transporting layer; and a second electrode, which emits second charge carriers having a second charge during operation and is arranged on the second charge carrier transporting layer; wherein during operation the second charge carrier transporting layer is largely free of first charge carriers emitted by the first electrode, wherein the first charge carrier transporting layer is an electron transporting layer and the second charge carrier transporting layer is a hole transporting layer, and wherein the LUMO of the second charge carrier transporting layer is at least 300 meV above the HOMO of the first charge carrier transporting layer.