Organic light emitting devices
First Claim
Patent Images
1. A display comprising at least one organic light emitting device comprising:
- (a) an anode;
(b) a hole transport layer adjacent to and in contact with the anode, the hole transport layer including N,N′
-di(naphthalene-1-yl)-N,N′
-diphenyl-benzidene;
(c) an electroluminescent material layer comprising at least two materials having different electron and hole transport capacities;
(d) an electron transport layer is composed entirely of 4,4′
-bis[2-(4,6-diphenyl-1,3,4-triazinyl)]-1,1′
-biphenyl; and
(e) a cathode,wherein said electroluminescent material layer has a thickness of less than 50 nm and wherein said device is capable of having an operational stability characterized by a half life of at least 1000 hours at an initial brightness of at least 500 cd/m2 by operating at a driving voltage of less than 5V at a current density of at least 20 mA/cm2,wherein the electroluminescent material layer consists essentially of tris(8-hydroxyquinoline) aluminum, N,N′
-di(naphthalene-1-yl)-N,N′
-diphenyl-benzidene, rubrene and at least one of fluorescent and phosphorescent materials.
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to organic light emitting devices (OLEDs) comprising an electroluminescent material layer comprising a mixture of at least two materials having different electron and hole transport capacities, and an electron transport layer comprising a triazine. Display devices comprising the OLEDs are also disclosed.
131 Citations
1 Claim
-
1. A display comprising at least one organic light emitting device comprising:
-
(a) an anode; (b) a hole transport layer adjacent to and in contact with the anode, the hole transport layer including N,N′
-di(naphthalene-1-yl)-N,N′
-diphenyl-benzidene;(c) an electroluminescent material layer comprising at least two materials having different electron and hole transport capacities; (d) an electron transport layer is composed entirely of 4,4′
-bis[2-(4,6-diphenyl-1,3,4-triazinyl)]-1,1′
-biphenyl; and(e) a cathode, wherein said electroluminescent material layer has a thickness of less than 50 nm and wherein said device is capable of having an operational stability characterized by a half life of at least 1000 hours at an initial brightness of at least 500 cd/m2 by operating at a driving voltage of less than 5V at a current density of at least 20 mA/cm2, wherein the electroluminescent material layer consists essentially of tris(8-hydroxyquinoline) aluminum, N,N′
-di(naphthalene-1-yl)-N,N′
-diphenyl-benzidene, rubrene and at least one of fluorescent and phosphorescent materials.
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeLG Display Co., Ltd.
-
Original AssigneeLG Display Co., Ltd.
-
InventorsAziz, Hany, Popovic, Zoran D., Coggan, Jennifer A., Hu, Nan-Xing
-
Primary Examiner(s)Chriss, Jennifer
-
Assistant Examiner(s)CROUSE, BRETT ALAN
-
Application NumberUS11/122,288Publication NumberTime in Patent Office2,995 DaysField of SearchNoneUS Class Current313/504CPC Class CodesH10K 2102/351 ThicknessH10K 50/11 characterised by the electr...H10K 85/654 comprising only nitrogen as...
