Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Organic light emitting device, fabrication method and display device

A technology of organic light-emitting devices and organic light-emitting layers, which is applied in the manufacture of semiconductor/solid-state devices, semiconductor devices, electric solid-state devices, etc., can solve the problems of reducing luminous efficiency and unbalanced carriers in the red light layer, and achieve improved luminous efficiency , reduce complexity and cost, and reduce the number of effects

Inactive Publication Date: 2018-07-13
KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT +1
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an organic light-emitting device that balances the carriers and improves the luminous efficiency in view of the problem that the carriers in the red light layer cannot be balanced and reduce the luminous efficiency in the existing organic light-emitting devices.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Organic light emitting device, fabrication method and display device
  • Organic light emitting device, fabrication method and display device
  • Organic light emitting device, fabrication method and display device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0088] The invention also provides a preparation method of the organic light-emitting device.

[0089] A method for preparing an organic light-emitting device, comprising the steps of:

[0090] mixing the first host material with the second host material to form a host evaporation source;

[0091] Evaporating the host evaporation source and the guest evaporation source to form the red light layer;

[0092]Wherein, the first host material is an electron-biased host material, and the second host material is a hole-biased host material.

[0093] Other steps are all known to those skilled in the art, and will not be repeated here.

[0094] The above preparation method can obtain an organic light-emitting device with high luminous efficiency. In addition, the first host material and the second host material are mixed in advance to form the host material evaporation source. In this way, the number of evaporation sources can be reduced, thereby reducing the complexity and cost of...

Embodiment 1

[0100] The glass substrate was cleaned with detergent and deionized water, and dried under an infrared lamp, and a layer of anode material was sputtered on the glass substrate with a film thickness of 150 nm.

[0101] Then, place the glass substrate with the anode material in the vacuum chamber and evacuate to 1×10 －4 Pa, continue to vapor-deposit HATCN on the anode material film layer as a hole injection layer, the film forming rate is 0.1nm / s, and the vapor-deposited film thickness is 20nm. NPB was vapor-deposited on HATCN as a hole transport layer with a film formation rate of 0.1nm / s and a film thickness of 40nm.

[0102] Evaporate the light-emitting layer on the hole transport layer, using the method of double-source co-evaporation, according to the mass percentage of the premixed host material (the first host material and the second host material are mixed in advance) and the phosphorescent dye through the film thickness monitor , adjust the film formation rate to contr...

Embodiment 2～ Embodiment 10

[0112] It is basically the same as Example 1, except that the specific structure of the organic light-emitting device is as follows:

[0113] ITO(150nm) / HATCN(20nm) / NPB(40nm) / premix host material: 1wt%Ir(piq-F) 2 (acac)(30nm) / TPBi(50nm) / 20%Ag:80%Mg(10nm) / Ag(15nm).

[0114] From Example 2 to Example 10, the ratio of the first host material H12 to the second host material H22 in the premixed host material is 1:9, 1:6, 1:3, 1:2, 1:1 respectively , 2:1, 3:1, 6:1, 9:1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Glass transition temperatureaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to an organic light emitting device. The organic light emitting device comprises a red-light layer, wherein the red-light layer comprises a subjective material and an objective material, the subjective material comprises a first subjective material and a second subjective material, the first subjective material is a deviation hole-type subjective material, the second subjective material is a deviation electron-type subjective material, and the red-light layer is fabricated according to the following steps of mixing the first subjective material and the second subjective material to form a subjective evaporation source and evaporating the subjective evaporation source and an objective evaporation source to form the red-light layer. In the organic light emitting device,the subjective material simultaneously comprises the deviation hole-type subjective material and the deviation electron-type subjective material, thus, carriers can be balanced, the light emitting efficiency of the organic light emitting device is further improved, and the driving voltage is simultaneously and favorably reduced; and the subjective material is mixed in advance, so that the complexity and the cost of evaporation equipment are reduced, the difficulty of an evaporation process is reduced, the proportion of the first subjective material and the second subjective material is easy to control, and the problem of proportion imbalance is prevented. The invention also discloses a fabrication method of the organic light emitting device and a display device.

Description

technical field [0001] The present invention relates to the field of organic light emitting technology, in particular to an organic light emitting device, a preparation method thereof and a display device. Background technique [0002] Due to its excellent performance, organic light-emitting devices have attracted more and more attention, and are also widely used in various occasions. [0003] In organic light-emitting devices, a single compound is generally selected as the host material of the light-emitting layer for the red light layer. However, a single compound or hole-biased (such as CBP) or electron-biased (such as BAlq), whether it is a hole-biased host material or an electron-biased host material, cannot balance the carriers, resulting in the red light layer The luminous efficiency of organic light-emitting devices decreases. Contents of the invention [0004] Based on this, it is necessary to provide an organic light-emitting device that balances the carriers a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01L51/50H01L51/56
CPCH10K71/164H10K50/12H10K71/00
Inventor 赵菲李维维闵超罗志忠
Owner KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com