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

Electron transport material and preparation method and application thereof

A technology of electron transport material and electron transport layer, which is applied in the direction of chemical instruments and methods, circuits, electrical components, etc., to achieve the effect of simple synthesis method and improved luminous efficiency

Inactive Publication Date: 2012-09-19
东莞彩显有机发光科技有限公司 +1
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used electron transport materials for phosphorescence systems are mainly nitrogen-containing heterocyclic materials such as pyridine, because they have good electron transport capabilities, but good electron transport capabilities are not enough, and higher triplet energy levels are also required. to limit the escape of triplet excitons from the light-emitting layer

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
  • Electron transport material and preparation method and application thereof
  • Electron transport material and preparation method and application thereof
  • Electron transport material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: An electron transport material, 2-(3-(diphenylphosphoryloxy)phenyl)-4,6-bis(3-(3-pyridyl)phenyl)-1,3,5 -The preparation method of triazine, its reaction process is as follows:

[0049]

[0050] Concrete reaction steps are:

[0051] (1) Preparation of intermediate product 1: 2,4,6-tris(3-bromophenyl)-1,3,5-triazine. Measure 15ml of trifluoromethanesulfonic acid into a 250ml three-neck flask, cool to -2°C, and add 100ml of 0.7M 3-bromoxynil trichloromethane solution dropwise under stirring. After the dropwise addition, it was transferred to room temperature to continue the reaction for 24h. The reaction was stopped, and concentrated ammonia water with a volume ratio of 1:10 was slowly dripped into the reaction solution and then poured into water. After layering, the organic phase was washed three times with saturated brine, and then vacuum-dried after rotary evaporation. The crude product was obtained, and the crude product was subjected to column chromat...

Embodiment 2

[0060] Example 2: LUMO and HOMO energy level analysis of compound 1

[0061] UV absorption, fluorescence emission and cyclic voltammetry tests were carried out on compound 1, from Figure 5 The LUMO=-3.64eV of compound 1 can be obtained from the cyclic voltammetry spectrum, and then from Figure 4 From the ultraviolet absorption spectrum, Eg=4.04eV and HOMO=LUMO-Eg=-7.68eV of compound 1 are obtained, which proves that compound 1 has better electron affinity and ion potential.

Embodiment 3

[0062] Example 3: Application of a nitrogen-heterocyclic electron transport material containing pyridinium phosphooxy in blue phosphorescent devices. The electron transport material consists of a phosphorus oxy group with a high triplet energy level and a pyridine unit with electron transport capabilities constitute.

[0063] The phosphorescent host material with bipolar carrier transport capability:

[0064] The anode layer is ITO;

[0065] The hole injection layer is HAT;

[0066] The hole transport layer is NPB;

[0067] The electron blocking layer is mCP;

[0068] The main layer is 2,6-DCzPPY; the blue light-doped luminescent material is FIrpic;

[0069] The electron transport layer is Compound 1, which is the final product prepared in Example 1 of the present invention,

[0070] The electron injection layer is LiF;

[0071] The cathode layer is Al.

[0072] Prepare devices where, as Figure 6 As shown, the device structure is: ITO / HAT(20nm) / NPB(30nm) / mcp(5nm) / 2,6-...

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
melting pointaaaaaaaaaa
current efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention discloses an electron transport material and a preparation method and an application thereof. A compound used for preparing the material comprises phosphorus oxyl in a high triplet state, and pyridine and triazine units with electron transport capabilities, wherein in the high triplet state, energy can be effectively prevented from transmitted to a main body material in a light emitting process. The material has high electron transport capability, can be used for preventing energy retransmission in the light emitting process, and is applied to electron transport layers of blue light phosphorescent light organic electroluminescent devices; and the efficiency of a phosphorescence device is increased remarkably.

Description

technical field [0001] The invention belongs to the field of organic electroluminescent devices, and in particular relates to an electron transport material and a preparation method thereof, as well as the application of the material in blue-light phosphorescent organic electroluminescent devices. Background technique [0002] In the past two decades, organic electroluminescent devices (OLEDs) have been widely used due to their advantages such as self-luminescence, high brightness, high efficiency, thinness, wide viewing angle, easy processing, low-voltage drive, easy large-area preparation, and full-color display. Its application prospects have attracted widespread attention. The research on organic luminescence began in the 1950s. Until 1987, Tang et al. of Kodak Company of the United States adopted a sandwich device structure in the patent US4356429, and the developed OLED device had a luminance of 1000cd / m2 driven by a DC voltage of 10V. 2 , so that OLED has achieved an...

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): C07F9/6558H01L51/54
Inventor 殷正凯颜培坚赵伟明
Owner 东莞彩显有机发光科技有限公司
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