Display device and method for manufacturing display device

Patent metadata

Field	Value
Publication number	US-12052880-B2
Application number	US-202217574812-A
Country	US
Kind code	B2
Filing date	Jan 13, 2022
Priority date	Jan 15, 2021
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

According to one embodiment, a display device includes a lower electrode, a second insulating layer including an opening overlapping the lower electrode, an organic layer including a light-emitting layer and a functional layer, disposed in the opening and covering the lower electrode and an upper electrode covering the organic layer. The functional layer includes a first region located between the lower electrode and the light-emitting layer and a second region including an end surface located directly above the second insulating layer. A dopant concentration of a guest material in the second region is lower than the dopant concentration of the guest material in the first region.

First claim

What is claimed is:

1. A method for manufacturing a display device comprising:
forming a lower electrode;
forming an organic layer on the lower electrode; and
forming an upper electrode on the organic layer,
wherein the forming the organic layer includes forming a functional layer, and
the forming the functional layer includes co-depositing a host material emitted at a first radiation angle and a guest material emitted at a second radiation angle smaller than the first radiation angle.

2. The method of claim 1 , wherein
a p-type dopant is deposited as the guest material.

3. The method of claim 1 , wherein
a shape of a nozzle which emits the host material is different from a shape of a nozzle which emits the guest material.

4. The method of claim 1 , wherein
a temperature distribution of a crucible for heating the host material is different from a temperature distribution of a crucible for heating the guest material.

5. A method for manufacturing a display device comprising:
forming a lower electrode;
forming an organic layer on the lower electrode; and
forming an upper electrode on the organic layer,
wherein the forming the organic layer includes forming a light-emitting layer, and
the forming the light-emitting layer includes co-depositing a host material emitted at a first radiation angle and a guest material emitted at a second radiation angle greater than the first radiation angle.

6. The method of claim 5 , wherein
a shape of a nozzle which emits the host material is different from a shape of a nozzle which emits the guest material.

7. The method of claim 5 , wherein
a temperature distribution of a crucible for heating the host material is different from a temperature distribution of a crucible for heating the guest material.

Assignees

• Japan Display Inc

Inventors

• Aoki Hayata
• Nishimura Masumi
• Nitta Jun

Classifications

• H10K50/12 Primary

  comprising dopants · CPC title

• H10K50/155 Primary

  comprising dopants · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K50/17

  Carrier injection layers · CPC title

• H10K2101/80

  Composition varying spatially, e.g. having a spatial gradient · CPC title