Organic electroluminescent device

An electroluminescent device and electroluminescent technology, which are applied to organic semiconductor devices, electro-solid devices, electrical components, etc., can solve the problems of low efficiency of light-emitting devices, and achieve the effects of low roll-off, high efficiency and low turn-on voltage.

Active Publication Date: 2021-02-26
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD +1
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the present invention is to solve the problem of low efficiency of fluorescent electroluminescent devices in the prior art

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 electroluminescent device
  • Organic electroluminescent device
  • Organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides an organic electroluminescent device, such as figure 2 As shown, it includes a first electrode 1, a hole transport layer 2, a light emitting layer 3, an electron transport layer 4, an electron injection layer 5 and a second electrode. As an embodiment of the present invention, specifically, the structure of the organic electroluminescent device is: ITO / TAPC (50nm) / TCTA (10nm) / light-emitting layer (30nm) / BPBiPA (30nm) / LiF (0.5nm) / Al (150nm). Wherein, the light-emitting layer 3 includes the first host material PhCzTRz, the TADF sensitizer PXZ-DPS, and the fluorescent dye PhtBuPAD. The specific structure is as follows:

[0044]

[0045] Among them, the triplet state energy level: TCTA is greater than PhCzTrz than PhtBuPAD.

[0046] Such as image 3 Compared with the emission spectra of the hole transport layer material (TCTA) and the first host material (PhCzTrz), the spectrum of the shown hole transport layer material and the first host mate...

Embodiment 2

[0049] This embodiment provides an organic electroluminescent device, the structure of which is the same as that of Embodiment 1, and the first host material is replaced by:

[0050]

Embodiment 3

[0052] This embodiment provides an organic electroluminescent device, the structure of which is the same as that of Embodiment 1, and the TADF material is replaced by:

[0053]

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

No PUM Login to view more

Abstract

The invention belongs to the technical field of display, and particularly relates to an organic electroluminescent device, in particular to an efficient fluorescent device. According to the invention,a light emitting layer includes a thermally-activated delayed fluorescence material, a first host material, and a fluorescent dye; and a hole transport layer can form an interfacial exciplex with thefirst host material and further sensitize the fluorescent dye by using the thermally-activated delayed fluorescent material as a sensitizer. According to thethermally-activateddelayed fluorescence sensitized fluorescence (TSF) organic electroluminescent device prepared by the invention, the external quantum efficiency of the device exceeds the external quantum efficiency of a traditional fluorescent device by about 5%, the light-emitting efficiency of the fluorescent OLED device is greatly improved, and meanwhile, the device has the advantages of low turn-on voltage, low roll-off and the like.

Description

[0001] This application is a divisional application with the filing date of November 18, 2017, the application number: 201711151474.6, and the invention name "Organic Electroluminescent Device". technical field [0002] The invention belongs to the field of display technology, and in particular relates to an organic electroluminescence element. Background technique [0003] Organic light-emitting diodes (organic light-emitting diodes, OLEDs) have great application prospects in the field of display and lighting due to the advantages of ultra-thin, light weight, low energy consumption, active light emission, wide viewing angle, and fast response. more and more people's attention. [0004] In 1987, Deng Qingyun (C.W.Tang) and Vanslyke of Eastman Kodak Company in the United States first reported the use of transparent conductive film as anode, Alq3 as light-emitting layer, triarylamine as hole transport layer, Mg / Ag alloy as cathode, and made a double layer organic electrolumin...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/50
CPCH10K85/623H10K85/615H10K85/656H10K85/654H10K50/121H10K85/633H10K85/657H10K85/6572H10K50/11H10K2101/40H10K50/15H10K2101/20H10K85/30H10K85/381H10K85/622H10K85/624H10K85/631H10K85/636H10K85/6565H10K2101/30
Inventor 段炼张东东宋晓增蔡明瀚魏金贝
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap