Red color emitting compounds for organic electroluminescent device and an organic electroluminescent device using them
AssigneeLG Electronics Inc.
InventorsYoon-Heung Tak, Yoon-Soo Han, Ki-Dong Kim, Sang-Dae Kim, Yong-Kwan Kim
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Abstract
The present invention relates to red color emitting compounds for an organic electroluminescent device (OELD), particularly to red color emitting compounds represented by the following formula (1) having high luminescence efficiency and enhanced thermal-stability: R1—CH═CH—X—CH═CH—R2 wherein, R1, R2 and X each are as defined below.
Claims7
A compound represented by the following formula (1):
- R1—CH═CH—X—CH═CH—R2
- wherein,
- X is
- R1, R2 and R3 each are independently formula (2), formula (3), or formula (4) or formula (5), with the proviso that R1 and R2 each are not formula (5) when x is 1,4-dicyanophenyl, and at least one of R1, R2 and R3 are not formula (5) when X is 1,3,5-tricyanophenyl,
- wherein,
- R4, R5, R6, R7, R8 and R9 each are independently a hydrogen atom, a halogen group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted allyl group.
An organic electroluminescent device having one or more organic thin layers formed between a first electrode and a second electrode, wherein at least any one layer of the organic thin layers comprises one or more compounds represented by the following formula (1):
- R1—CH═CH—X—CH═CH—R2
- wherein,
- X is
- R1, R2 and R3 each are independently formula (2), formula (3), or formula (4) or formula (5), with the proviso that R1 and R2 each are not formula (5) when x is 1,4-dicyanophenyl,
- wherein
- R4, R5, R6, R7, R8 and R9 each are independently a hydrogen atom, a halogen group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted allyl group.
Dependencies are inferred from the claim text.