Organic compound, light emitting diode and light emitting device having the compound

Patent metadata

Field	Value
Publication number	US-11524947-B2
Application number	US-201916719467-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Dec 21, 2018
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

An organic compound having a tetraphenyl moiety and at least one fused hetero aryl moiety having at least one oxygen and/or sulfur on a ring and bonded to the tetraphenyl moiety directly or indirectly, and a light emitting diode and a light emitting device having the organic compound are disclosed. The organic compound has excellent thermal resistance property and hole mobility property. The organic compound can be incorporated into a hole transfer layer, an electron blocking layer and/or a charge generation layer of the light emitting diode. Therefore, the light emitting diode and light emitting device according to the present invention have decreased driving voltage and enhanced luminous efficiency.

First claim

What is claimed is:

1. An organic compound having a structure of Chemical Formula 1:

wherein each of R 1 and R 2 is independently an unsubstituted or substituted C 5 ˜C 30 aryl group or an unsubstituted or substituted C 4 ˜C 30 hetero aryl group, wherein at least one of R 1 and R 2 is an unsubstituted or substituted C 10 ˜C 30 hetero aryl group, which has at least one of oxygen (O) and sulfur (S) in a ring; each of L 1 , L 2 , and L 3 is independently an unsubstituted or substituted C 5 ˜C 30 arylene group or an unsubstituted or substituted C 4 ˜C 30 hetero arylene group; o is an integer of 1 or 2; and each of p and q is independently an integer of 0 to 2.

2. The organic compound of claim 1 , wherein at least one of R 1 and R 2 has a hetero aromatic moiety selected from the group consisting of dibenzofuranyl, dibenzothiophenyl, xanthenyl, benzo-chromenyl, thianthrenyl, phenoxazinyl, phenothiazinyl and phenoxathinyl, each of which is unsubstituted or substituted.

3. The organic compound of claim 1 , wherein each of L 1 , L 2 , and L 3 comprises 1 or 2 aromatic rings or 1 or 2 hetero aromatic rings.

4. The organic compound of claim 1 , wherein the organic compound has a structure of Chemical Formula 2:

5. A light emitting diode, comprising:
a first electrode;
a second electrode,
wherein the first electrode and the second electrode face each other;

an emitting material layer,
wherein the emitting material layer is disposed between the first and second electrodes; and

a hole transfer layer,
wherein the hole transfer layer is disposed between the first electrode and the emitting material layer and comprises an organic compound having a structure of Chemical Formula 1:

wherein each of R 1 and R 2 is independently an unsubstituted or substituted C 5 ˜C 30 aryl group or an unsubstituted or substituted C 4 ˜C 30 hetero aryl group, wherein at least one of R 1 and R 2 is an unsubstituted or substituted C 10 ˜C 30 hetero aryl group, which has at least one of oxygen (O) and sulfur (S) in a ring; each of L 1 , L 2 , and L 3 is independently an unsubstituted or substituted C 5 ˜C 30 arylene group or an unsubstituted or substituted C 4 ˜C 30 hetero arylene group; o is an integer of 1 or 2; and each of p and q is independently an integer of 0 to 2.

6. The light emitting diode of claim 5 , wherein at least one of R 1 and R 2 has a hetero aromatic moiety selected from the group consisting of dibenzofuranyl, dibenzothiophenyl, xanthenyl, benzo-chromenyl, thianthrenyl, phenoxazinyl, phenothiazinyl and phenoxathinyl, each of which is unsubstituted or substituted.

7. The light emitting diode of claim 5 , wherein each of L 1 , L 2 , and L 3 comprises 1 or 2 aromatic rings or 1 or 2 hetero aromatic rings.

8. The light emitting diode of claim 5 , wherein the hole transfer layer comprises a hole injection layer, and a hole transport layer disposed between the hole injection layer and the emitting material layer and, and wherein the hole transport layer comprises the organic compound.

9. The light emitting diode of claim 8 , wherein the hole transport layer comprises a host and a dopant, and wherein the host comprises the organic compound.

10. The light emitting diode of claim 8 , wherein the hole transport layer comprises a first hole transport layer disposed between the hole injection layer and the emitting material layer and a second hole transport layer disposed between the first hole transport layer and the emitting material layer, and wherein the second hole transport layer comprises the organic compound.

11. A light emitting device, comprising:
a substrate;
a thin-film transistor disposed over the substrate; and
the light emitting diode according to claim 5 ,
wherein the light emitting diode is disposed on the substrate and is electrically connected to the thin-film transistor.

12. A light emitting diode, comprising:
a first electrode;
a second electrode,
wherein the first electrode and the second electrode face each other;

an emitting material layer,
wherein the emitting material layer is disposed between the first and second electrodes; and

an electron blocking layer,
wherein the electron blocking layer is disposed between the first electrode and the emitting material layer and comprises an organic compound having a structure of Chemical Formula 1:

wherein each of R 1 and R 2 is independently an unsubstituted or substituted C 5 ˜C 30 aryl group or an unsubstituted or substituted C 4 ˜C 30 hetero aryl group, wherein at least one of R 1 and R 2 is an unsubstituted or substituted C 10 ˜C 30 hetero aryl group, which has at least one of oxygen (O) and sulfur (S) in a ring; each of L 1 , L 2 , and L 3 is independently an unsubstituted or substituted C 5 ˜C 30 arylene group or an unsubstituted or substituted C 4 ˜C 30 hetero arylene group; and each of o, p and q is independently an integer of 0 to 2.

13. The light emitting diode of claim 12 , wherein at least one of R 1 and R 2 has a hetero aromatic moiety selected from the group consisting of dibenzofuranyl, dibenzothiophenyl, xanthenyl, benzo-chromenyl, thianthrenyl, phenoxazinyl, phenothiazinyl and phenoxathinyl, each of which is unsubstituted or substituted.

14. The light emitting diode of claim 12 , wherein each of L 1 , L 2 , and L 3 includes 1 or 2 aromatic rings, or 1 or 2 hetero aromatic rings.

15. A light emitting device, comprising:
a substrate;
a thin-film transistor disposed over the substrate; and
the light emitting diode according to claim 11 ,
wherein the light emitting diode is disposed on the substrate and is electrically connected to the thin-film transistor.

16. A light emitting diode, comprising:
a first electrode;
a second electrode,
wherein the first electrode and second electrode face each other;

a first emitting unit,
wherein the first emitting unit is disposed between the first and second electrodes, and wherein the first emitting

Assignees

• Lg Display Co Ltd

Inventors

• Jang So-Young
• Park Hee-Jun
• Seo Jeong-Dae
• Yoo Seon-Keun
• Shin Ji-Cheol
• Kim Sang-Beom

Classifications

• C07D307/91 Primary

  Dibenzofurans; Hydrogenated dibenzofurans · CPC title

• C07D409/12 Primary

  linked by a chain containing hetero atoms as chain links · CPC title

• C07D333/76

  Dibenzothiophenes · CPC title

• C07D407/12

  linked by a chain containing hetero atoms as chain links · CPC title

• H01L51/0072

  Electricity · mapped topic