IP Library › Granted Patent US 7,858,211
Granted Patent B2
US 7,858,211 · App. 12/275,196 · Granted Dec 28, 2010

Organic electroluminescent device

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Quick Facts
Patent No.
US 7,858,211
App. No.
12/275,196
Granted
Dec 28, 2010
Kind
B2
Abstract

An organic electroluminescent device, which has, between a pair of electrodes, at least one organic layer including a light-emitting layer, in which the organic layer contains a specific tetraphenylene compound, and in which the light-emitting layer contains a phosphorescent material; and a specific tetraphenylene compound that can be used in the device.

Claims (11)

1. An organic electroluminescent device, comprising, between a pair of electrodes, at least one organic layer comprising a light-emitting layer comprising a phosphorescent material,

wherein the organic electroluminescent device contains at least one compound represented by formula (1A):

wherein, in formula (1A), R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , R 29 , R 30 , R 31 , R 32 , R 33 , R 34 , R 35 , and R 36 each represent a hydrogen atom or a substituent; and at least one of R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , R 29 , R 30 , R 31 , R 32 , R 33 , R 34 , R 35 , and R 36 is a group having a Hammett σ p value of 0.05 or more.

2. The organic electroluminescent device of claim 1 , wherein the compound represented by formula (1A) is contained in the light-emitting layer.

3. The organic electroluminescent device of claim 1 , wherein the light-emitting layer comprises an electron-injecting/transporting compound.

4. The organic electroluminescent device of claim 3 , wherein the electron-injecting/transporting compound is a metal complex.

5. The organic electroluminescent device of claim 3 , wherein the electron-injecting/transporting compound is a heterocyclic compound comprising at least two nitrogen atoms.

6. The organic electroluminescent device of claim 1 , wherein the phosphorescent material is a transition metal complex.

7. The organic electroluminescent device of claim 1 , wherein the phosphorescent material is an orthometalated iridium complex.

8. The organic electroluminescent device of claim 1 , wherein at least one substituent selected from the group consisting of R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , R 29 , R 30 , R 31 , R 32 , R 33 , R 34 , R 35 , and R 36 in formula (1A) represents a group containing a pyridine ring, benzimidazole ring, imidazopyridine ring, a fluorine atom or chlorine atom.

9. The organic electroluminescent device of claim 1 , wherein at least one substituent selected from the group consisting of R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , R 29 , R 30 , R 31 , R 32 , R 33 , R 34 , R 35 , and R 36 in formula (1A) represents a group containing a pyridine ring, imidazopyridine ring or a fluorine atom.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 1, 2012
From: FUJIFILM CORPORATION
To: UDC IRELAND LIMITED
Reel/Frame 028889/0636 →