Organic light emitting diodes (OLEDs) including a barrier layer and method of manufacture
AssigneeAgency for Science, Technology and Research
InventorsLin Ke, Senthil Kumar Ramadas, Soo Jin Chua
Life of this patent
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Abstract
An Organic Light Emitting Diode (OLED) which is adapted to inhibit the formation and growth of non-emissive areas known as “dark spots.” The OLED comprises an anode disposed on a substrate, a cathode, an electroluminescent (EL) layer disposed between the anode and the cathode and a hole transport layer disposed between the anode and the EL layer. The OLED has one or more dielectric organic barrier layers disposed between one or more of the OLED's layers. These barrier layers are made from an organic polymer and are adapted to resist permeation by oxygen and moisture and to inhibit metal migration.
Claims45
An organic light emitting diode (OLED), comprising:
- an anode disposed on a substrate;
- a cathode;
- an electroluminescent (EL) layer disposed between the anode and the cathode;
- a hole transport layer disposed between the anode and the EL layer;
- an electron injecting layer disposed between the EL layer and the cathode;
- and
- at least one dielectric organic barrier layer disposed between and in contact with
- the cathode and the electron injecting layer,
- the at least one dielectric organic barrier layer having a structure to at least one of:
- resist permeation by oxygen;
- resist permeation by moisture;
- and
- inhibit metal migration.
An organic light emitting diode (OLED), comprising:
- an anode disposed on a substrate;
- a cathode;
- an electroluminescent (EL) layer disposed between the anode and the cathode;
- a hole transport layer disposed between the anode and the EL layer;
- at least one dielectric organic barrier layer disposed between and in contact with the EL layer and
- the cathode, the at least one dielectric organic barrier layer having a structure to at least one of:
- resist permeation by oxygen;
- resist permeation by moisture;
- and
- inhibit metal migration;
- and
- at least another dielectric organic barrier layer disposed between the hole transport layer and the anode.
An organic light emitting diode (OLED), comprising:
- an anode disposed on a substrate;
- a cathode;
- an electroluminescent (EL) layer disposed between the anode and the cathode;
- a hole transport layer disposed between the anode and the EL layer;
- at least one dielectric organic barrier layer disposed between and in contact with either:
- the anode and the hole transport layer;
- or
- the hole transport layer and the EL layer;
- the at least one dielectric organic barrier layer having a structure to at least one of:
- resist permeation by oxygen;
- resist permeation by moisture;
- and
- inhibit metal migration;
- and
- at least another dielectric organic barrier layer disposed between the hole transport layer and the anode.
A method of manufacturing an organic light emitting diode (OLED) comprising:
- forming an anode on a substrate;
- forming a hole transport layer above the anode;
- forming an electroluminescent (EL) layer above the hole transport layer;
- forming a electrode injecting layer above the EL layer;
- forming a cathode above the EL layer;
- and
- forming at least one dielectric organic barrier layer disposed between and in contact with
- the electrode injecting layer and the cathode,
- wherein the at least one dielectric organic barrier layer is structured to at least one of:
- resist permeation by oxygen;
- resist permeation by moisture;
- and
- inhibit metal migration.
Dependencies are inferred from the claim text.