Red phosphorescent compound and organic electroluminescent device using the same

Patent metadata

Field	Value
Publication number	US-8956737-B2
Application number	US-23900508-A
Country	US
Kind code	B2
Filing date	Sep 26, 2008
Priority date	Sep 27, 2007
Publication date	Feb 17, 2015
Grant date	Feb 17, 2015

Abstract

The invention relates to a red phosphorescent compound represented by the following Formula (1) and an organic electroluminescent (EL) device using the same:

wherein

First claim

What is claimed is:

1. A red phosphorescent compound represented by Formula 1 below:

wherein

R1, R2, R3 and R4 are each independently selected from the group consisting of hydrogen, substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy and combinations thereof, in which at least two of R1, R2, R3 and R4 are each independently selected from the group consisting of substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy and combinations thereof,
or
each of R1, R2, R3 and R4 is halogen;
when each of R1, R2 and R4 is C 1 -C 6 alkyl, R3 is selected from the group consisting of substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy and combinations thereof;
when each of R1 and R3 is C 1 -C 6 alkyl or C 1 -C 6 alkoxy, R2 or R4 is selected from the group consisting of substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy and combinations thereof; and
when each of R1 and R4 is C 1 -C 6 alkyl or C 1 -C 6 alkoxy, R2 or R3 is selected from the group consisting of substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy and combinations thereof;

is selected from 2,4-pentanedione

2,2,6,6-tetramethylheptane-3,5-dione

1,3-propanedione

1,3-butanedione

3,5-heptanedione,

1,1,1-trifluoro-2,4-pentanedione

1,1,1,5,5,5-hexafluoro-2,4-pentanedione

and 2,2-dimethyl-3,5-hexanedione

and
when

is 2,4-pentanedione

at least one of R1, R2, R3 and R4 is not hydrogen, methyl, methoxyl, or fluoro.

2. The red phosphorescent compound according to claim 1 , wherein the C 1 -C 6 alkyl is selected from the group consisting of methyl, ethyl, n-propyl, i-propyl, n-butyl, butyl and t-butyl.

3. The red phosphorescent compound according to claim 1 , wherein the C 1 -C 6 alkoxy is selected from the group consisting of methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy and t-butoxy.

4. The red phosphorescent compound according to claim 1 , wherein

is selected from 2,2,6,6-tetramethylheptane-3,5-dione

1,3-propanedione

1,3-butanedione

3,5-heptanedione

1,1,1-trifluoro-2,4-pentanedione

1,1,1,5,5,5-hexafluoro-2,4-pentanedione

and 2,2-dimethyl-3,5-hexanedione

and

is selected from the following compounds:

5. The red phosphorescent compound according to claim 1 , wherein the compound of Formula 1 is selected from the following compounds:

6. The red phosphorescent compound according to claim 1 , wherein each of R1, R2, R3 and R4 is halogen selected from the group consisting of F, Cl and Br.

7. The red phosphorescent compound according to claim 1 , wherein each of R1, R2, R3 and R4 is independently selected from the group consisting of ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy and t-butoxy.

8. The red phosphorescent compound according to claim 1 , wherein

is selected from the following compounds:

9. The red phosphorescent compound according to claim 1 , wherein R3 is selected from the group consisting of substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy and combinations thereof.

10. The red phosphorescent compound according to claim 1 , wherein
R3 is selected from the group consisting of substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy and combinations thereof, and
at least two of R1, R2 and R4 are each independently selected from the group consisting of substituted or unsubstituted C 1 -C 6 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy and combinations thereof.

11. The red phosphorescent compound according to claim 1 , wherein at least one of R1, R2, R3 and R4 is not hydrogen, methyl, methoxyl, or fluoro.

12. The red phosphorescent compound according to claim 1 , wherein when

is 2,4-pentanedione

at least one of R1, R2, R3 and R4 is not hydrogen, methyl, methoxyl or F.

13. The red phos

Assignees

• Park Chun Gun
• Kim Jung Keun
• Jeong Hyun Cheol
• Bin Jong Kwan
• Pieh Sung Hoon
• Kim Do Han
• Kim Yong Kwan
• Lg Display Co Ltd

Inventors

• Park Chun Gun
• Kim Jung Keun
• Jeong Hyun Cheol
• Bin Jong Kwan
• Pieh Sung Hoon
• Kim Do Han
• Kim Yong Kwan

Classifications

• C09K2211/185

  of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd · CPC title

• Y10S428/917

  Electroluminescent · CPC title

• C09K2211/1029

  containing one nitrogen atom as the heteroatom · CPC title

• C09K2211/1007

  Non-condensed systems · CPC title

• C07F15/0033 Primary

  Iridium compounds · CPC title