A novel combination of a host compound and a dopant compound and an organic electroluminescence device comprising the same
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ROHM & HAAS ELECTRONICS MATERIALS LLC
- Publication Date
- 2015-05-06
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The present invention relates to novel combinations of host compounds and dopant compounds and organic electroluminescent devices comprising the novel combinations. Background technique
[0002] An electroluminescence (EL) device is a self-luminous device, and its advantage is that it provides a wider viewing angle, higher contrast ratio and faster response time than LCD. Eastman Kodak first developed an organic EL device by using small aromatic diamine molecules and aluminum complexes as materials for forming the light emitting layer [Appl. Phys. Lett. 51, 913, 1987].
[0003] The most important factor determining luminous efficiency in an organic EL device is a luminescent material. Electroluminescent materials include host materials and dopant materials for functional purposes. In general, devices known to have extremely excellent electroluminescent characteristics have a structure in which a host is doped with a dopant to form an electroluminesce...