US 10,764,974 B2 · Light-emitting device using organometallic complex having a pyrazine skeleton

Abstract

Light-emitting elements having high emission efficiency and long lifetime can be provided. By forming light-emitting devices including the light-emitting elements, the light-emitting devices having low power consumption and long lifetime can be provided. A light-emitting device comprises a light-emitting element including a light-emitting layer between a first electrode and a second electrode. The light-emitting layer includes a first organic compound having a hole-transporting property, a second organic compound having an electron transporting property, and an organometallic complex. A central metal of the organometallic complex is an element belonging to one of Group 9 and Group 10, and a ligand of the organometallic complex is a ligand having a pyrazine skeleton.

Claims22

Dependent claims

A light-emitting device comprising:

a first electrode;
a hole transporting layer over the first electrode;
a light-emitting layer over the hole transporting layer;
an electron transporting layer over the light-emitting layer;
and
a second electrode over the electron transporting layer,
wherein the light-emitting layer includes a first organic compound having a hole-transporting property, a second organic compound having an electron transporting property, and an organometallic complex,
wherein a central metal of the organometallic complex comprises an element belonging to one of Group 9 and Group 10,
wherein a ligand of the organometallic complex comprises a pyrazine skeleton, and
wherein an amount of the second organic compound is equal to or higher than an amount of the first organic compound.

7 more elements

A light-emitting device comprising:

a first electrode;
a hole transporting layer over the first electrode;
a light-emitting layer over the hole transporting layer;
an electron transporting layer over the light-emitting layer;
and
a second electrode over the electron transporting layer,
wherein the light-emitting layer includes a first organic compound having a hole-transporting property, a second organic compound having an electron transporting property, and an organometallic complex,
wherein the organometallic complex is represented by a general formula (G4),
wherein Ar represents an arylene group, R1 represents one of an alkyl group and an aryl group, R2 represents one of hydrogen, an alkyl group and an aryl group, R3 represents one of hydrogen and an alkyl group, M represents a central metal, the central metal comprises an element belonging to one of Group 9 and Group 10, and L represents a monoanionic ligand,
wherein when the central metal comprises an element belonging to Group 9, n is 2 and when the central metal comprises an element belonging to Group 10, n is 1,
wherein an amount of the second organic compound is equal to or higher than an amount of the first organic compound.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/157,497Filed 11 Oct 2018 · continuation

Priority

JP 2006-32505730 Nov 2006

Published

US 2019/0053351 A114 Feb 2019

Granted

1 Sep 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

H05B 33/14
Light sources with substantially two-dimensional [2D] radiating surfaces: characterised by the chemical or physical composition or the arrangement…
C09K 11/06
Luminescent materials, e.g. electroluminescent or chemiluminescent: containing organic luminescent materials
H10K 50/11
OLEDs or polymer light-emitting diodes [PLED]: characterised by the electroluminescent [EL] layers
H10K 85/342
Transition metal complexes, e.g. Rupolypyridine complexes: comprising iridium

Family

Application11/986,949Parent of this continuation · filed 27 Nov 2007

US 2019/0053351 A1Pre-grant publication · published 14 Feb 2019

US 10,129,947 B2Parent of this continuation

US 2008/0149923 A1Published application

US 10,764,974 B2This patent

From the US filing history. Foreign family members aren’t listed.

Light-emitting device using organometallic complex having a pyrazine skeleton

Life of this patent

Light-emitting device using organometallic complex having a pyrazine skeleton

Life of this patent

Abstract

Claims22