IP Library Granted Patent US 7,326,475
Granted Patent B2
US 7,326,475 · App. 10/532,027 · Granted Feb 5, 2008

Material for organic electroluminescent device, organic electroluminescent device, illuminating device and display

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 7,326,475
App. No.
10/532,027
Granted
Feb 5, 2008
Kind
B2
Abstract

The present invention provides: an organic EL element exhibiting high luminance, a high external quantum efficiency and a long high temperature driving life at 50° C.; an illuminator and a display device employing the organic EL element; and a material preferably used for the organic EL element.

Claims (54)

1. A pyrrole derivative for an organic electroluminescent element represented by one of Formulae (7) to (11):

wherein:

R 16 , R 19 , R 22 and R 25 each represent an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an aryl group which may have a substituent or a heterocyclic group which may have a substituent;

R 17 , R 18 , R 20 , R 21 , R 23 , R 24 , R 26 , and R 27 each represent a substituent;

n4 represents an integer of 0 to 4; and

n5 through n11 each represent an integer of 0 to 3; and

 wherein:

R 28 , and R 29 each represent a hydrogen atom or a substituent;

Z 9 and Z 12 each represent a group of atoms necessary to form a 5-to 7-member fused ring;

Z 10 and Z 11 each represent a group of atoms necessary to form a nitrogen-containing 5-to 7-membered heterocycle;

L represents a linking group of divalent through tetravalent; and m and n each represent an integer of 1 or 2.

2. An organic electroluminescent element comprising a pair of electrodes having therebetween one or more constituting layers, wherein:

at least one of the constituting layers is a light emitting layer;

one of the constituting layers contains the pyrrole derivative for the organic electroluminescent element represented by the following Formula (1), and having a molecular weight of not less than 450:

 wherein:

R 1 represents an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an aryl group which may have a substituerit or a heterocyclic group which may have a substituent;

R 2 represents a hydrogen atom or a substituent;

Z 1 represents a group of atoms necessary to form a 5- to 7-membered fused ring combined with two carbon atoms; and Z 2 represents a group of atoms necessary to form a nitrogen-containing 5- to 7-mernbered heterocycle combined with a carbon atom and a nitrogen atom.

3. The organic electroluminescent element of claim 2 , wherein the light emitting layer contains the pyrrole derivative for the organic electroluminescent element.

4. The organic electroluminescent element of claim 2 , wherein the constituting layers contain a hole blocking layer containing the pyrrole derivative for the organic electroluminescent element.

5. The organic electroluminescent element of claim 2 , wherein the organic electroluminescent element emits blue light.

6. The organic electroluminescence element of claim 2 , wherein the organic electroluminescent element emits white light.

7. An illuminator comprising the organic electroluminescent element of claim 2 .

8. A display device comprising the organic electroluminescent element of claim 2 .

9. The organic electroluminescent element of claim 2 , wherein the pyrrole derivative is represented by Formula (2)

wherein:

Ar 1 represents an aryl group which may have a subsitutent, or a heterocyclic group which may have a substituent;

R 3 represents a hydrogen atom or a substituent; and

Z 3 and Z 4 each represent a group of atoms necessary to form a 5- to 7-member fused ring.

10. The organic electroluminescent element of claim 2 , wherein the pyrroe derivative is represented by one of Formulae (3) to (6):

wkherein:

R 4 , R 7 , R 10 and R 13 each represent an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an aryl group which may have a substituent or a heterocyclic group which may have a substituent;

R 5 , R 6 , R 8 , R 9 , R 11 , R 12 , R 14 , and R 15 each represent a substituent;

Z 5 through Z 8 each represent a group of atoms necessary to form a 5- to-7-membered fused ring;

n1 represents an integer of 0 to 3; and

n2 and n3 each represent an integer of 0 to 2.

11. The organic electroluminescent element of claim 2 , wherein the pyrrole derivative is represented by one of Formulae (7) to (10):

Wherein:

R 16 , R 19 , R 22 and R 25 each represent an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an aryl group which may have a substituent or a heterocyclic group which may have a substituent;

R 17 , R 18 , R 20 , R 21 , R 23 , R 24 , R 26 , and R 27 , each represent a substituent;

n4 represents an integer of 0 to 4; and

n5 through n11 each represent an integer of 0 to 3.

12. The organic electroluminescent element of claim 2 , wherein the pyrrole derivative is represented by Formula (11)

wherein:

R 28 , and R 29 each represent a hydrogen atom or a substituent;

Z 9 and Z 12 each represent a group of atoms necessary to form a 5- to 7-membered fused ring;

Z 10 and Z 11 each represent a group of atoms necessary to form a nitrogen-containing 5- to 7-membered heterocycle;

L represents a linking group of divalent through tetravalent; and

m and n each represent an integer of 1 or 2.

13. The organic electroluminescent element of claim 2 wherein a wavelength giving a fluorescence maximum of the pyrrole derivative represented by Formula (1) or Formula (2) is not more than 500 nm.

14. The organic electroluminescent element of claim 9 wherein a wavelength giving a fluorescence maximum of the pyrrole derivative represented by Formula (1) or Formula (2) is not more than 500 nm.

15. The organic electroluminescent element of claim 10 wherein a wavelength giving a fluorescence maximum of the pyrrole derivative represented by Formula (1) or Formula (2) is not more than 500 nm.

16. The organic electroluminescent element of claim 11 wherein a wavelength giving a fluorescence maximum of the pyrrole derivative represented by Formula (1) or Formula (2) is not more than 500 nm.

17. The organic electroluminescent element of claim 12 wherein a wavelength giving a fluorescence maximum of the pyrrole derivative represented by Formula (1) or Formula (2) is not more than 500 nm.

Assignments (4)
NUNC PRO TUNC ASSIGNMENT Recorded Oct 7, 2021
From: KONICA MINOLTA INC
To: MERCK PERFORMANCE MATERIALS GERMANY GMBH
Reel/Frame 057748/0075 →
NUNC PRO TUNC ASSIGNMENT Recorded Oct 7, 2021
From: MERCK PERFORMANCE MATERIALS GERMANY GMBH
To: MERCK PATENT GMBH
Reel/Frame 057748/0146 →
CHANGE OF NAME Recorded Mar 23, 2020
From: KONICA MINOLTA HOLDINGS, INC.
To: KONICA MINOLTA, INC.
Reel/Frame 052207/0010 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 21, 2005
From: KATOH, EISAKU; KITA, HIROSHI; OSHIYAMA, TOMOHIRO; FUKUDA, MITSUHIRO; SUZURI, YOSHIYUKI; UEDA, NORIKO
To: KONICA MINOLTA HOLDINGS, INC.
Reel/Frame 016940/0524 →