Loading patent…
OwnerDashan Qin, Jan Blochwitz-Nimoth +2inventors
InventorsDashan Qin, Jan Blochwitz-Nimoth, Xiang Zhou, Martin Pfeiffer
Estimating the term…
The invention relates to a light emitting component with organic layers and emission of triplet exciton states (phosphorescent light) with increased efficiency, having a layer sequence with a hole injecting contact (anode), one or more hole injecting and transporting layers, a system of layers in the light emission zone, one or more electron transport and injection layers and an electron injecting contact (cathode), characterized in that the light emitting zone comprises a series of heterojunctions with the materials A and B (ABAB . . . ) that form interfaces of the type “staggered type II”, one material (A), having hole transporting or bipolar transport properties and the other material (B) having electron transporting or bi-polar transport properties, and at least one of the two materials A or B being mixed with a triplet emitter dopant that is able to efficiently convert its triplet exciton energy into light.
A light emitting component with organic layers and emission of triplet exciton states (phosphorescent light) with increased efficiency, having a layer sequence with a hole injecting contact (anode), one or more hole injecting and transporting layers, a system of layers in the light emission zone, one or more electron transport and injection layers and an electron injecting contact (cathode), characterized in that the light emitting zone comprises a series of heterojunctions with the materials A and B (ABAB . . . ) that form interfaces of the type “staggered type II”, one material (A), having hole transporting or bipolar transport properties and the other material (B) having electron transporting or bipolar transport properties, and at least one of the two materials A or B being mixed with a triplet emitter dopant that is able to efficiently convert its triplet exciton energy into light.
A light emitting component with organic layers and emission of triplet exciton states (phosphorescent light) with increased efficiency, having a layer sequence with a hole injecting contact (anode), one or more hole injecting and transporting layers, a system of layers in the light emission zone, one or more electron transport and injection layers and an electron injecting contact (cathode), characterized in that the light emitting zone comprises a heterojunction with the materials A and B (AB), the interface being of the type “staggered type II”, material (A) having hole transporting or bipolar transport properties and the other material (B) having electron transporting or bipolar transport properties, and both materials A or B being mixed with a triplet emitter dopant that is able to efficiently convert its triplet exciton energy into light.
The light emitting component as in characterized in that the layer sequence of the OLED furthermore contains a blocking layer between the innermost electron transport layer and the last light emission layer (Bn), there existing a barrier for hole injection from the light emission layer into the electron transport layer.
Dependencies are inferred from the claim text.