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US 11,456,427 B2Granted
Organic light emitting diode and organic light emitting device having the same
AssigneeLG Display Co., Ltd.
InventorsBo-Min Seo, Jeong-Eun Baek, Dae-Wi Yoon, Mi-Sang Yoo
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Abstract
An organic light emitting diode including at least one emitting material layer, which includes a host and a dopant and at least one exciton energy control layer disposed adjacently to the at least one emitting material layer and an organic light emitting device having the same is disclosed. The at least one exciton energy control layer includes an organic compound that has excited state singlet and triplet energy levels lower than excited state singlet and triplet energy levels of the host. The organic light emitting diode can enhance its luminous efficiency and its luminous lifetime by incorporating one or more exciton energy control layers.
Claims40
An organic light emitting diode, comprising:
- a first electrode;
- a second electrode, wherein the first electrode and the second electrode face each other;
- and
- at least one emitting unit,
- wherein the at least one emitting unit is disposed between the first and second electrodes, and comprises an emitting material layer,
- wherein the emitting material layer comprises a first emitting material layer including a first host and a first dopant, and a first exciton energy control layer,
- wherein the first exciton energy control layer is disposed between the first electrode and the first emitting material layer or disposed between the first emitting material layer and the second electrode,
- wherein the first exciton energy control layer comprises a first organic compound,
- wherein each of an excited state singlet energy level and an excited state triplet energy level of the first organic compound is lower than each of an excited state singlet energy level and an excited state triplet energy level of the first host, respectively, and
- wherein the first dopant comprises a delayed fluorescent material.
7 more elements
An organic light emitting diode, comprising:
- a first electrode;
- a second electrode, wherein the first electrode and the second electrode face each other;
- and
- at least one emitting unit,
- wherein the at least one emitting unit is disposed between the first and second electrodes, and comprises an emitting material layer,
- wherein the emitting material layer comprises a first emitting material layer including a first host and a first dopant, and a first exciton energy control layer,
- wherein the first exciton energy control layer is disposed between the first electrode and the first emitting material layer or disposed between the first emitting material layer and the second electrode,
- wherein the first exciton energy control layer comprises a first organic compound, wherein each of an excited state singlet energy level and an excited state triplet energy level of the first organic compound is lower than each of an excited state singlet energy level and an excited state triplet energy level of the first host, respectively, and
- wherein the first dopant comprises the first organic compound.
6 more elements
An organic light emitting diode, comprising:
- a first electrode;
- a second electrode, wherein the first electrode and the second electrode face each other;
- and
- at least one emitting unit,
- wherein the at least one emitting unit is disposed between the first and second electrodes, and comprises an emitting material layer,
- wherein the emitting material layer comprises a first emitting material layer including a first host and a first dopant, and a first exciton energy control layer,
- wherein the first exciton energy control layer is disposed between the first electrode and the first emitting material layer or disposed between the first emitting material layer and the second electrode,
- wherein the first exciton energy control layer comprises a first organic compound, wherein each of an excited state singlet energy level and an excited state triplet energy level of the first organic compound is lower than each of an excited state singlet energy level and an excited state triplet energy level of the first host, respectively, and
- wherein the first organic compound has the following structure of Chemical Formula 1:
- wherein each of R1 to R3 is independently protium, deuterium, tritium, C5˜C30 aryl group unsubstituted or substituted with cyano group, nitro group, halogen, C1˜C10 alkyl group, C1˜C10 alkyl halide group, C5˜C30 aryl group or C4˜C30 hetero aryl group, or C4˜C30 hetero aryl group unsubstituted or substituted with cyano group, nitro group, halogen, C1˜C10 alkyl group, C1˜C10 alkyl halide group, C5˜C30 aryl group or C4˜C30 hetero aryl group;
- and
- wherein R4 is protium, deuterium, tritium or phenyl group unsubstituted or substituted with cyano group, nitro group, halogen, C1˜C10 alkyl group, C1˜C10 alkyl halide group, C5˜C30 aryl group or C4˜C30 hetero aryl group.
9 more elements
Dependencies are inferred from the claim text.