US 2010/0133523 A1 · LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE

Abstract

Light-emitting elements in which an increase of driving voltage can be suppressed are provided. Light-emitting devices whose power consumption is reduced by including such light-emitting elements are also provided. In a light-emitting element having an EL layer between an anode and a cathode, a first layer in which carriers can be produced is formed between the cathode and the EL layer and in contact with the cathode, a second layer which transfers electrons produced in the first layer is formed in contact with the first layer, and a third layer which injects the electrons received from the second layer into the EL layer is formed in contact with the second layer.

Claims29

Dependent claims

A light-emitting element comprising:

an EL layer including a light-emitting layer between an anode and a cathode;
a first layer including a first hole-transporting substance and a first acceptor substance, provided in contact with the cathode between the cathode and the EL layer;
a second layer including a first electron-transporting substance, provided in contact with the first layer;
and
a third layer including a second electron-transporting substance and an element, provided in contact with the second layer and the EL layer.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/627,142Filed 30 Nov 2009

Priority

JP 2008-3061531 Dec 2008

Published

3 Jun 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

H10K 71/30
Manufacture or treatment specially adapted for the organic devices covered by this subclass: doping active layers, e.g. electron transporting layers
H10K 50/155
Hole transporting layers: comprising dopants
H10K 50/157
Hole transporting layers: between the light-emitting layer and the cathode
H10K 50/171
Carrier injection layers: electron injection layers

Light-emitting element, light-emitting device, electronic device, and lighting device

Life of this patent

Light-emitting element, light-emitting device, electronic device, and lighting device

Life of this patent

Abstract

Claims29