US 2021/0202848 A1 · LIGHT-EMITTING DEVICE INCLUDING A PLURALITY OF ORGANIC ELECTROLUMINESCENT ELEMENTS

Abstract

A light-emitting device includes a plurality of organic EL elements. Each of the organic EL elements includes a reflection electrode, a hole transport region, an electron-trapping luminescent layer, and a light extraction electrode in this order. The hole transport region has a sheet resistance of 4.0×107 Ω/sq.⋅ or more at a current of 0.1 nA/pixel, and the total thickness of the hole transport region and the electron-trapping luminescent layer is equivalent to an optical path length enabling emission from the electron-trapping luminescent layer to be enhanced.

Claims16

Dependent claims

A light-emitting device comprising:

a reflection electrode:
a first luminescent layer being of an electron trapping type;
and
a light extraction electrode, in this order,
wherein the first luminescent layer includes a first surface and a second surface closer to the light extraction electrode than the first surface, and
wherein a distance between the reflection electrode and the second surface of the first luminescent layer is equivalent to a length enabling emission from the first luminescent layer to be enhanced.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/202,020Filed 15 Mar 2021

Priority

JP 2017-20282019 Oct 2017

Published

1 Jul 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification28 codes

H10K 59/30
Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00: devices…
C07C 211/00
Compounds containing amino groups bound to a carbon skeleton
C07C 211/01
Compounds containing amino groups bound to a carbon skeleton: having amino groups bound to acyclic carbon atoms
C07C 211/33
Compounds containing amino groups bound to a carbon skeleton: having amino groups bound to carbon atoms of rings other than six-membered aromatic…

Light-emitting device including a plurality of organic electroluminescent elements

Life of this patent

Light-emitting device including a plurality of organic electroluminescent elements

Life of this patent

Abstract

Claims16