Organic electroluminescent materials and devices

Patent metadata

Field	Value
Publication number	US-12598906-B2
Application number	US-202117192035-A
Country	US
Kind code	B2
Filing date	Mar 4, 2021
Priority date	Mar 31, 2020
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

Provided is an OLED having an anode, a cathode and an organic emissive layer disposed between the anode and the cathode. The emissive layer includes a first host; and a first emitter; wherein the first emitter is selected from the following group: (L 1 -L 2 ) n Ir(L A ) 3−n and (L B ) n Ir(L 3 -L 4 ) 3−n ; wherein (L 1 -L 2 ) n Ir(L A ) 3−n is

and (L B ) n Ir(L 3 -L 4 ) 3−n is

First claim

What is claimed is:

1 . An organic light emitting device (OLED), comprising:
an anode; a cathode; and an organic emissive layer disposed between the anode and the cathode comprising:
a first host; and
a first emitter;
wherein the first emitter is (L 1 -L 2 ) n Ir(L A ) 3−n ; wherein (L 1 -L 2 ) n Ir(L A ) 3−n is

wherein L 1 -L 2 represents an anionic bidentate ligand;
wherein n is 1 or 2;
wherein each of R S1 , R S2 , R S3 , R S4 , R S5 , and R S6 is independently selected from the group consisting of alkyl, cycloalkyl, partially or fully fluorinated variants thereof, partially or fully deuterated variants thereof, and combinations thereof;
wherein at least one of R S1 to R S6 is not CH 3 ;
wherein any two substituents of R S1 , R S2 , R S3 , R S4 , R S5 , and R S6 can be joined or fused into a ring;
wherein at least one of the following is true:
(1) R S1 is joined with R S2 to form a ring;
(2) R S1 is joined with R S2 to form a ring, and R S4 is joined with R S5 to form a ring; or
(3) at least one of R S1 to R S6 is partially or fully fluorinated alkyl; and
wherein the first host comprises at least one donor group G D , and at least one acceptor group G A .

2 . The OLED of claim 1 , wherein the ligand (L 1 -L 2 ) is selected from the group consisting of:

wherein Y 1 to Y 10 are each independently selected from the group consisting of carbon and nitrogen;
wherein Y′ is selected from the group consisting of BR e , BR e R f , NR e , PR e , O, S, Se, C═O, S═O, SO 2 , CR e R f , SiR e R f , and GeR e R f ;
wherein R e and R f are optionally fused or joined to form a ring;
wherein R a , and R b each independently represent zero, mono, or up to a maximum allowed substitution to its associated ring;
wherein each of R a , R b , R e and R f is independently hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, boryl; and
wherein two adjacent substituents of R a , and R b are optionally fused or joined to form a ring or form a multidentate ligand.

3 . The OLED of claim 1 , wherein the ligand (L 1 -L 2 ) is selected from the group consisting of:
L 1 -L 2 -1-i based on Structure 1:

L 1 -L 2 -2-i based on Structure 2:

L 1 -L 2 -3-i based on Structure 3:

L 1 -L 2 -4-i based on Structure 4:

L 1 -L 2 -5-i based on Structure 5:

L 1 -L 2 -6-i based on Structure 6:

L 1 -L 2 -7-i based on Structure 7:

L 1 -L 2 -8-i based on Structure 8:

L 1 -L 2 -9-i based on Structure 9:

L 1 -L 2 -10-i based on Structure 10:

L 1 -L 2 -11-i based on Structure 11:

L 1 -L 2 -12-i based on Structure 12:

L 1 -L 2 -13-i based on Structure 13:

L 1 -L 2 -14-i based on Structure 14:

and L 1 -L 2 -15-i based on Structure 15:

L 1 -L 2 -16-i based on Structure 16:

L 1 -L 2 -17-i based on Structure 17:

wherein i is an integer from 1 to 810, and for each i, R E , and G are as defined below:

i
R E
G

1
R 1
G 1

2
R 2
G 1

3
R 3
G 1

4
R 4
G 1

5
R 5
G 1

6
R 6
G 1

7
R 7
G 1

8
R 8
G 1

9
R 9
G 1

10
R 10
G 1

11
R 11
G 1

12
R 12
G 1

13
R 13
G 1

14
R 14
G 1

15
R 15
G 1

16
R 16
G 1

17
R 17
G 1

18
R 18
G 1

19
R 19
G 1

20
R 20
G 1

21
R 21
G 1

22
R 22
G 1

23
R 23
G 1

24

Assignees

• Universal Display Corp

Inventors

• Lin Chun
• Ji Zhiqiang
• Wang Ting-Chih
• Boudreault Pierre-Luc T

Classifications

• H10K2101/10

  Triplet emission · CPC title

• H10K50/11 Primary

  characterised by the electroluminescent [EL] layers · CPC title

• C09K2211/185

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

• C09K2211/1029

  containing one nitrogen atom as the heteroatom · CPC title

• C09K2211/1007

  Non-condensed systems · CPC title