Organic compound, OLED, and application thereof

Patent metadata

Field	Value
Publication number	US-12435270-B2
Application number	US-202217830610-A
Country	US
Kind code	B2
Filing date	Jun 2, 2022
Priority date	Dec 30, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

Provided are an organic compound, an OLED, and an application thereof. The organic compound has a structure shown in Formula I; the compound is a polycyclic aromatic compound with large conjugate plane, which is formed by connecting aromatic fused rings with heterogeneous elements such as boron and nitrogen. Through the design of skeleton structure and substituents, the compound has narrow half-peak width, high color purity and internal quantum efficiency; and with substituents introduction, the intermolecular aggregation can be effectively inhibited, thereby avoiding fluorescence decrease induced by aggregation and improving luminescence efficiency of the device, and meanwhile, can also effectively regulate triplet energy level of molecules, and effectively prolong the device lifetime. The organic compound is used for OLED devices, especially for light-emitting layer materials, which can effectively improve the luminescence efficiency, reduce turn-on voltage and energy consumption, prolong working life, and enable the OLED device to have better comprehensive performance.

First claim

What is claimed is:

1. An organic compound, having a structure as shown in Formula I:

wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 are each independently selected from any one of substituted or unsubstituted C1 to C30 linear or branched alkyl, substituted or unsubstituted C3 to C30 cycloalkyl or substituted or unsubstituted C6 to C30 aryl;
n 1 and n 4 are each independently selected from integers from 0 to 5;
n 2 , n 3 , n 5 , and n 6 are each independently selected from integers from 0 to 4; and
n 7 is selected from integers from 0 to 2.

2. The organic compound according to claim 1 , wherein substituents in the substituted linear or branched alkyl, substituted cycloalkyl and substituted aryl are each independently selected from at least one of halogen, cyano, C1 to C10 linear or branched alkyl, C1 to C10 alkoxy, C6 to C20 aryl or C6 to C20 arylamino.

3. The organic compound according to claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 are each independently selected from any one of C1 to C10 linear or branched alkyl, substituted or unsubstituted C3 to C10 cycloalkyl, or substituted or unsubstituted C6 to C20 aryl; and
substituted substituents in R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 are each independently selected from at least one of C1 to C10 linear or branched alkyl or C3 to C10 cycloalkyl.

4. The organic compound according to claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 are each independently selected from methyl, isopropyl, t-butyl, cyclohexyl, phenyl, naphthyl,

wherein the dotted line represents the linkage site of the group.

5. The organic compound according to claim 1 , wherein n 1 , n 2 , n 3 , n 4 , n 5 , n 6 , and n 7 are each independently selected from integers from 0 to 2.

6. The organic compound according to claim 1 , wherein the sum of n 1 , n 2 , n 3 , n 4 , n 5 , n 6 , and n 7 ranges from 1 to 8.

7. The organic compound according to claim 1 , having a structure as shown in Formula II:

wherein R 1 ′, R 2 ′, R 3 ′, R 4 ′, R 5 ′, R 6 ′, R 7 ′, and R 8 ′ are each independently selected from any one of hydrogen, substituted or unsubstituted C1 to C30 linear or branched alkyl, substituted or unsubstituted C3 to C30 cycloalkyl, or substituted or unsubstituted C6 to C30 aryl;
substituted substituents in R 1 ′, R 2 ′, R 3 ′, R 4 ′, R 5 ′, R 6 ′, R 7 ′, and R 8 ′ are each independently selected from at least one of halogen, cyano, C1 to C10 linear or branched alkyl, C1 to C10 alkoxy, C6 to C20 aryl or C6 to C20 arylamino.

8. The organic compound according to claim 7 , having a structure as shown in Formula III:

wherein R 1 ′, R 2 ′, R 3 ′, R 4 ′, R 5 ′, R 6 ′, R 7 ′, and R 8 ′ have the same range as defined in Formula II.

9. The organic compound according to claim 7 , wherein R 1 ′, R 2 ′, R 3 ′, R 4 ′, R 5 ′, R 6 ′, R 7 ′, and R 8 ′ are each independently selected from any one of hydrogen, C1 to C10 linear or branched alkyl, substituted or unsubstituted C3 to C10 cycloalkyl, or substituted or unsubstituted C6 to C20 aryl; and
substituted substituents in R 1 ′, R 2 ′, R 3 ′, R 4 ′, R 5 ′, R 6 ′, R 7 ′, and R 8 ′ are each independently selected from at least one of C1 to C10 linear or branched alkyl or C3 to C10 cycloalkyl.

10. The organic compound according to claim 7 , wherein R 1 ′, R 2 ′, R 3 ′, R 4 ′, R 5 ′, R 6 ′, R 7 ′, and R 8 ′ are each independently selected from hydrogen, methyl, isopropyl, t-butyl, cyclohexyl, phenyl, naphthyl,

wherein the dotted line represents the linkage site of the group.

11. The organic compound according to claim 7 , wherein R 1 ′ and R 4 ′ are identical groups, R 2 ′ and R 8 ′ are identical groups, and R 3 ′ and R 6 ′ are identical groups.

12. The organic compound according to claim 7 , wherein not all of R 1 ′, R 2 ′, R 3 ′, R 4 ′, R 5 ′, R 6 ′, R 7 ′, and R 8 ′ are hydrogen.

13. The organic compound according to claim 7 , wherein the number of groups that are not hydrogen in R 1 ′, R 2 ′, R 3 ′, R 4 ′, R 5 ′, R 6 ′, R 7 ′, and R 8 ′ is 1 to 6.

14. The organic compound according to claim 1 , selected from any one of the following compounds D1 to D105:

Assignees

• Wuhan Tianma Micro Electronics Co Ltd
• Wuhan Tianma Microelectronics Co Ltd Shanghai Branch

Inventors

• Liu Ying
• Jiang Dong
• Deng Dongyang

Classifications

• H10K85/322

  comprising boron · CPC title

• H10K50/858

  comprising refractive means, e.g. lenses · CPC title

• H10K85/658

  Organoboranes · CPC title

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• C09K2211/1014

  bridged by heteroatoms, e.g. N, P, Si or B · CPC title