OLED device with stabilized yellow light-emitting layer
View Patent ↗The invention provides an OLED device including an anode, a cathode and a yellow light-emitting layer located therebetween, the light-emitting layer comprising a 9,10-diarylanthracene host; a yellow light-emitting 5,6,11,12-tetraphenyltetracene derivative where as least 1 of the phenyl groups is further substituted and a non-light-emitting diarylamine substituted 9,10-diarylsubstituted anthracene stabuilizer. Devices of the invention provide improvement in features such as stability and efficiency while maintaining excellent color.
1. An OLED device comprising an anode, a cathode and a yellow light-emitting layer located therebetween, the light-emitting layer comprising:
(a) a 9,10-diarylanthracene host represented by:
wherein:
R 1 and R 6 each independently represents an aryl group having 6-24 carbon atoms;
R 3 and R 8 are each independently chosen from hydrogen, alkyl groups from 1-24 carbon atoms or aromatic groups from 5-24 carbon atoms;
R 2 , R 4 , R 5 , R 7 , R 9 and R 10 are hydrogen;
(b) a yellow light-emitting tetraceneTD-8:
and
(c) a non-light-emitting diarylamine substituted 9,10-diarylsubstituted anthracene according to Formula (3):
wherein:
X 1 and X 2 are independently selected aryl groups of 6 to 30 nucleus carbon atoms;
Ar 3 and Ar 4 each independently represents a substituted or unsubstituted aryl group of 6 to 30 nucleus carbon atoms where Ar 1 and Ar 2 or Ar 3 and Ar 4 can optionally be joined together; and
n is 2.
2. The OLED device of claim 1 wherein in the diarylamine substituted 9,10-diarylsubstituted anthracene according to Formula (3), X 1 and X 2 are independently selected from phenyl or naphthyl groups; Ar 3 and Ar 4 are independently selected from phenyl or naphthyl groups; and n is 2.
3. The OLED device of claim 1 wherein in light-emitting layer, the diarylamine 9,10-diarylsubstituted anthracene according to Formula (3) is present at 5% or greater by volume and the tetracene TD-8 is present at 3% or greater.
4. An OLED device comprising an anode, a cathode and a yellow light-emitting layer located therebetween, the light-emitting layer comprising:
(a) a 9,10-diarylanthracene host represented by:
wherein:
R 1 and R 6 each independently represents an aryl group having 6-24 carbon atoms; R 3 and R 8 are each independently chosen from hydrogen, alkyl groups from 1-24 carbon atoms or aromatic groups from 5-24 carbon atoms; R 2 , R 4 , R 5 , R 7 , R 9 and R 10 are hydrogen;
(b) a yellow light-emitting tetracene according to TD-1:
and (c) a non-light-emitting diarylamine substituted 9,10-diarylsubstituted anthracene according to Formula (3):
wherein:
X 1 and X 2 are independently selected aryl groups of 6 to 30 nucleus carbon atoms; Ar 3 and Ar 4 each independently represents a substituted or unsubstituted aryl group of 6 to 30 nucleus carbon atoms where Ar 1 and Ar e or Ar 3 and Ar 4 can optionally be joined together; and n is 2.
5. The OLED device of claim 4 wherein in the diarylamine substituted 9,10-diarylsubstituted anthracene according to Formula (3), X 1 and X 2 are independently selected from phenyl or naphthyl groups; Ar 3 and Ar 4 are independently selected from phenyl or naphthyl groups; and n is 2.
6. The OLED device of claim 4 wherein in light-emitting layer, the diarylamine 9,10-diarylsubstituted anthracene according to Formula (3) is present at 5% or greater by volume and the tetracene TD-1 is present at 3% or greater.
7. The OLED device of claim 1 wherein in the 9,10-diarylanthracene host: R 1 and R 6 each represent an independently selected phenyl group, biphenyl group, or naphthyl group; R 3 represents hydrogen or an aromatic group from 6-24 carbon atoms; and R 2 , R 4 , R 5 , R 7 -R 10 represent hydrogen.
8. The OLED device of claim 4 wherein in the 9,10-diarylanthracene host:
R 1 and R 6 each represent an independently selected phenyl group, biphenyl group, or naphthyl group; R 3 represents hydrogen or an aromatic group from 6-24 carbon atoms; and R 2 , R 4 , R 5 , R 7 —R 10 represent hydrogen.