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Organic light-emitting device

An electroluminescent device and luminescent technology, applied in the field of display, can solve the problems of low current efficiency, achieve the effects of improving current efficiency, increasing recombination area, and reducing driving voltage

Active Publication Date: 2019-03-05
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low current efficiency of organic electroluminescent devices in the prior art, thereby providing an organic electroluminescent device

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0058] The structure of the organic electroluminescent device provided by this implementation is: ITO (20nm) / formula (I-1): F4TCNQ (4wt%, 20nm) / formula (II-1) (76nm) / AND: perylene (3wt%, 30nm) / Bphen(25nm) / Ag(16nm) / Alq3(65nm).

[0059] Wherein, ITO: indium tin oxide, is the first electrode;

[0060] AND: 9,10-bis(2-naphthyl)anthracene, a dopant material for the light-emitting layer;

[0061] Perylene: perylene, which is the main material of the light-emitting layer;

[0062] Bphen: 4,7-diphenyl-1,10-phenanthroline, an electron transport layer material;

[0063] Ag: silver, is the second electrode;

[0064] Alq3: Tris(8-hydroxyquinoline)aluminum, which is an optical coupling layer.

[0065] The first hole transport material is formula (I-1), the P-type dopant material is F4TCNQ, the ratio of the mass of the P-type dopant material to the mass of the first hole transport material is 4:100; the hole injection layer 30 The thickness of the hole transport layer 40 is 20 nm; the ...

Embodiment 2

[0076] This embodiment provides an organic electroluminescence device, the specific structure is the same as that of Embodiment 1, the difference is that the first hole transport material is formula (I-1), the P-type dopant material is F4TCNQ, and the hole injection layer 30 The thickness of the hole transport layer 40 is 10 nm, the doping concentration of the P-type dopant material is 8%; the second hole transport material is formula (II-2), and the thickness of the hole transport layer 40 is 86 nm.

Embodiment 3

[0078] This embodiment provides an organic electroluminescent device, the specific structure is the same as that of Embodiment 1, the difference is that the first hole transport material is formula (I-2), the P-type dopant material is F4TCNQ, and the hole injection layer 30 The thickness of the hole transport layer 40 is 10 nm, the doping concentration of the P-type dopant material is 4%; the second hole transport material is formula (II-3), and the thickness of the hole transport layer 40 is 86 nm.

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Abstract

The invention relates to the technical field of display, and particularly discloses an organic light-emitting device. The organic light-emitting device comprises a first electrode and an electron holeinjection layer, wherein the first electrode and the electron hole injection layer are laminated, Ohmic contact is formed between the first electrode and the electron hole injection layer, and the current carrier migration rate of the electron hole injection layer is smaller than 2*10<-5>CM<2>V<-1>S<-1>. By use of the device, the material with the low migration rate is adopted as the electron hole injection layer, so that the migration rate of the electron hole in the organic light-emitting device is lowered, the concentration of the electron hole on the light emitting layer of the OLED (Organic Light Emitting Device) can be lowered, the amount of electron holes and the amount of electrons in the light emitting layer tend to be balanced, the compound area of the electron holes and the electrons is improved, and therefore, the current efficiency of the OLED is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescent device. Background technique [0002] Organic Light-Emitting Device (English full name Organic Light-Emitting Device, referred to as OLED) is an active light-emitting device with low power consumption, wide color gamut, and thinner volume. It is expected to become the next generation of mainstream lighting and flat panel display technology. At present, organic electroluminescent technology has been widely used in small-sized panels such as smartphone displays. [0003] Generally, an OLED includes an anode, an organic light-emitting layer, and a cathode stacked on a substrate, and a carrier functional layer interposed between the electrode and the light-emitting layer. During operation, carriers (ie, holes and electrons) are injected into the organic light-emitting layer through the anode and the cathode, and different carriers combine in the light-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/50H01L51/52H10K99/00
CPCH10K85/636H10K85/633H10K50/155H10K50/17H10K50/852H10K85/631C09K11/06C09K11/08H05B33/12C07C15/04H10K85/626H10K85/6574H10K85/6576H10K50/11H10K2101/40
Inventor 闵超田景文刘胜芳
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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