Organic electroluminescent material and organic electroluminescent device by using the same

• US 20060063034A1
• Filed: 06/29/2005
• Published: 03/23/2006
• Est. Priority Date: 09/22/2004
• Status: Abandoned Application

• Current Assignee: RITDISPLAY CORPORATION
• Original Assignee: RITDISPLAY CORPORATION
• Inventors: Chen, Hung-Lin, Lin, Hsien-Chang, Wang, Tsing-Hai, Wu, Chia-Dung
• Application Number:
  US11/168,390
• Publication Number:
  US 20060063034A1
• Time in Patent Office: Days
• US Class Current: 428/690
• CPC Class Codes: C07D 311/16 substituted in position 7
• CPC Class Codes: C07D 405/04 directly linked by a ring-member-to-ring-member bond
• CPC Class Codes: C07D 405/10 linked by a carbon chain containing aromatic rings
• CPC Class Codes: C07D 405/14 containing three or more hetero rings
• CPC Class Codes: C07D 491/06 Peri-condensed systems
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1088 containing oxygen as the only heteroatom
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/653 comprising only oxygen as heteroatom

Abstract

An organic electroluminescent material of the formula (1):
wherein A and B are an electron donating group, R₁ and R₂ are an alkyl group.

Claims

1. An organic electroluminescent material of the formula (1):

2. The organic electroluminescent material of claim 1, wherein A and B are one selected from the group consisting of a substituted amino group having 1 to 30 carbon atoms, a non-substituted amino group having 1 to 30 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and an aroxy group having 1 to 30 carbon atoms.

3. The organic electroluminescent material of claim 1, wherein R₁ and R₂ are one selected from the group consisting of a substituted alkyl group having 1 to 6 carbon atoms and a non-substituted alkyl group having 1 to 6 carbon atoms.

4. The organic electroluminescent material of claim 1, wherein R₁ bonds with A.

5. The organic electroluminescent material of claim 1, wherein R₂ bonds with A.

6. An organic electroluminescent device, comprising:

a substrate;

a first electrode;

a second electrode; and

a light-emitting layer, wherein the first electrode, the light-emitting layer and the second electrode are disposed over the substrate in sequence, and the light-emitting layer comprises an organic electroluminescent material of the formula (2);

wherein A′ and

B′

are an electron donating group, R₁′ and

R₂′

are an alkyl group.

7. The organic electroluminescent device of claim 6, wherein A′

and B′

are one selected from the group consisting of a substituted amino group having 1 to 30 carbon atoms, a non-substituted amino group having 1 to 30 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and an aroxy group having 1 to 30 carbon atoms.

8. The organic electroluminescent device of claim 6, wherein R₁′

and R₂′

are one selected from the group consisting of a substituted alkyl group having 1 to 6 carbon atoms and a non-substituted alkyl group having 1 to 6 carbon atoms.

9. The organic electroluminescent device of claim 6, wherein R₁′

bonds with A′

.

10. The organic electroluminescent device of claim 6, wherein R₂‘

bonds with A’

.

11. The organic electroluminescent device of claim 6, wherein the organic electroluminescent material is ranged from 0.1 wt % to 25 wt % of the light-emitting layer.

12. The organic electroluminescent device of claim 6, further comprising:

a hole-transporting layer disposed between the first electrode and the light-emitting layer.

13. The organic electroluminescent device of claim 6, further comprising:

a hole-injecting layer disposed between the first electrode and the light-emitting layer.

14. The organic electroluminescent device of claim 6, further comprising:

a hole-blocking layer disposed between the light-emitting layer and the second electrode.

15. The organic electroluminescent device of claim 6, further comprising:

an electron-transporting layer disposed between the light-emitting layer and the second electrode.

16. The organic electroluminescent device of claim 6, further comprising:

an electron-injecting layer disposed between the light-emitting layer and the second electrode.

17. The organic electroluminescent device of claim 6, wherein the substrate is at least one selected from the group consisting of a rigid substrate, a flexible substrate, a glass substrate, a plastic substrate and a silicon substrate.

18. The organic electroluminescent device of claim 6, wherein the first electrode comprises conductive metal oxide.

19. The organic electroluminescent device of claim 18, wherein the conductive metal oxide is at least one selected from the group consisting of indium-tin oxide, aluminum-zinc oxide, indium-zinc oxide and cadmium-tin oxide.

20. The organic electroluminescent device of claim 6, wherein the second electrode is made of at least one material selected from the group consisting of aluminum, calcium, magnesium, indium, zinc, manganese, silver, gold and magnesium alloy.

21. The organic electroluminescent device of claim 20, wherein the magnesium alloy comprises at least one selected from the group consisting of Mg:

Ag alloy, Mg;

In alloy, Mg;

Sn alloy, Mg;

Sb alloy and Mg;

Te alloy.