Organic light emitting diode and organic light emitting device including the same
AssigneeLG Display Co., Ltd.
InventorsJi-Ae Lee, Jun-Yun Kim, Tae-Ryang Hong, Jeong-Eun Baek
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Abstract
An organic light emitting diode (OLED) including at least one emitting material layer (EML) disposed two electrodes and comprising triazine-based delayed fluorescent material and boron-dipyrromethene-based fluorescent material and an organic light emitting device including the OLED is disclosed. The triazine-based delayed fluorescent material and the boron-dipyrromethene-based fluorescent material may be included in an identical EML or in adjacently disposed EMLs. The OLED can lower its driving voltage and improve its luminous efficiency by adjusting energy levels of the delayed fluorescent material and the fluorescent material.
Claims26
An organic light emitting diode, comprising:
- a first electrode;
- a second electrode facing the first electrode;
- and
- an emitting material layer disposed between the first and second electrodes, the emitting material layer comprising:
- a first compound,
- a second compound comprising an organic compound having a structure represented by Chemical Formula 1, and
- a third compound,
- wherein the Chemical Formula 1 is:
- wherein:
- each of R1 and R2 is independently hydrogen or an unsubstituted or substituted C1-C10 alkyl group;
- and
- R3 is a phenoxazinyl moiety with a dibenzo-furan ring or a dibenzo-thiophene ring fused thereto,
- wherein the third compound includes at least one selected from the group consisting of:
- and
- wherein the first compound includes at least one selected from the group consisting of Bis [2-(diphenylphosphino)phenyl] ether oxide (DPEPO), 2,8-bis(diphenylphosphoryl)dibenzothiophene (PPT), 4′-(9H-carbazol-9-yl)biphenyl-3,5-dicarbonitrile (pCzB-2CN), 3′-(9H-carbazol-9- yl) biphenyl-3,5-dicarbonitrile (mCzB-2CN), Diphenyl-4-triphenylsilylphenyl-phosphine oxide (TSPO1), and 4-(3-(triphenylen-2-yl) phenyl)dibenzo [b,d] thiophene.
An organic light emitting diode comprising:
- a first electrode;
- a second electrode facing the first electrode;
- a first emitting material layer disposed between the first and second electrodes, the first emitting material layer comprising:
- a first compound;
- and
- a second compound that comprises an organic compound having a structure represented by Chemical Formula 1;
- a second emitting material layer disposed between the first electrode and the first emitting material layer or between the first emitting material layer and the second electrode, the second emitting material layer comprising:
- a fourth compound;
- and
- a fifth compound;
- and
- a charge generation layer disposed between the first emitting material layer and the second emitting material layer,
- wherein the Chemical Formula 1 is:
- wherein:
- each of R1 and R2 is independently hydrogen or an unsubstituted or substituted C1-C10 alkyl group;
- and
- R3 is phenoxazinyl moiety with a dibenzo-furan ring or a dibenzo-thiophene ring fused thereto,
- wherein the fifth compound includes at least one selected from the group consisting of:
- and
- wherein the first compound includes at least one selected from the group consisting Bis[2-(diphenylphosphino)phenyl] ether oxide (DPEPO), 2,8-bis(diphenylphosphoryl)dibenzothiophene (PPT),4′-(9H-carbazol-9-yl) biphenyl-3,5-dicarbonitrile (pCzB-2CN), 3′-(9H-carbazol-9-yl)biphenyl-3,5-dicarbonitrile (mCzB-2CN), Diphenyl-4-triphenylsilylphenyl-phosphine oxide (TSPO1), and 4-(3-(triphenylen-2-yl) phenyl)dibenzo [b,d] thiophene.
Dependencies are inferred from the claim text.