US 12,604,599 B2 · Display panel with improved charge generation layer

Abstract

The present invention relates to a display panel and a manufacturing method of the display panel. A charge generation layer of the present invention is produced using a mixture of an n-type organic material, a p-type organic material, and a polar solvent. The n-type organic material and the p-type organic material are mixed to form the charge generation layer, so that a contact area between the n-type organic material and the p-type organic material is increased. Accordingly, the present invention improves the transfer efficiency of charges, improves chances of separation of electrons and holes, and finally improves the charge generation efficiency of the charge generation layer. Therefore, the present invention avoids the use of a fine metal mask (FMM) in an evaporation process. Consequently, the present application reduces production costs and can be used in large-size-screen G8.6 production lines.

Claims8

Dependent claims

A display panel, comprising:

a substrate;
a first electrode disposed on the substrate;
a charge generation layer disposed at one side of the first electrode away from the substrate;
and
a second electrode disposed at one side of the charge generation layer away from the substrate;
wherein a material of the charge generation layer comprises a mixture of an n-type organic material and a p-type organic material, and
an energy level difference between a highest occupied molecular orbital (HOMO) energy level of the p-type organic material and a lowest unoccupied molecular orbital (LUMO) energy level of the n-type organic material is less than 2 eV.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/050,832Filed 28 Oct 2022

Priority

CN 202211193046.028 Sep 2022

Published

US 2024/0107787 A128 Mar 2024

Granted

14 Apr 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H10K 50/11
OLEDs or polymer light-emitting diodes [PLED]: characterised by the electroluminescent [EL] layers
H10K 59/32
Devices specially adapted for multicolour light emission: stacked devices having two or more layers, each emitting at different wavelengths
H10K 71/00
Manufacture or treatment specially adapted for the organic devices covered by this
H10K 71/13
Using liquid deposition, e.g. spin coating: using printing techniques, e.g. ink-jet printing or screen printing

Display panel with improved charge generation layer

Life of this patent

Display panel with improved charge generation layer

Life of this patent

Abstract

Claims8