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

OLED alloy cathode and preparation method thereof

A kind of alloy and cathode technology, which is applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve the problems of unbalanced device positive load carrier injection, weak ability of cathode to emit electrons, easy oxidation or peeling, etc. Achieve the effects of reducing the difficulty of preparation, easy control of film thickness, and reducing the difficulty of operation

Active Publication Date: 2015-10-28
西安拓创光芯科技有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because single-layer metal cathodes such as Mg and Li have poor stability in the atmosphere and are easy to oxidize or peel off, metals with low work functions and metals with high work functions are often evaporated together to form alloy cathodes to improve the stability and reliability of the device. Although commonly used alloy cathodes such as Mg / Ag, Ca / Al, etc. can improve the performance of the device to a certain extent, the ability of the cathode to emit electrons is still weak, and the device still has positive load carrier injection imbalance. The problem

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
  • OLED alloy cathode and preparation method thereof
  • OLED alloy cathode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] A preparation method of OLED alloy cathode, comprising the following steps:

[0024] Step 1, Ca, Mg, Al raw material preparation: adopt the electronic balance of 1 / 10,000 to weigh Ca respectively according to the mass ratio Ca:Mg:Al=15%: (5%-25%): (80%-60%) , Mg, Al raw materials;

[0025] Step 2, preparation of the quartz glass tube: cut off the required length of the quartz glass tube, and use a mixed gas of oxygen and liquefied petroleum gas to melt and seal one end of the quartz glass tube for use;

[0026] Step 3, sealing of raw materials: Put the weighed Ca, Mg and Al raw materials into a quartz glass tube with one end closed, vacuumize the quartz glass tube and burn the other end of the quartz glass tube with a mixed gas of oxygen and liquefied petroleum gas melting seal;

[0027] Step 4, preparation of the alloy cathode: Put the sealed quartz glass tube with raw materials into the high-temperature sintering furnace. The temperature setting of the high-temperat...

Embodiment 1

[0029] This embodiment is an OLED alloy cathode, including 20% ​​Mg, 15% Ca, and 65% Al. Among them, the work function of Al is 4.28ev, the work function of Mg is 3.7ev, and the work function of Ca is 2.87ev. It is formed by melting in a quartz glass tube under vacuum conditions by vacuum melting and then cooling naturally.

[0030] The preparation process is as follows:

[0031] Step 1, preparation of Ca, Mg and Al raw materials: Use an electronic balance of 1 / 10,000 to separate the required Al wire, Ca particles, and Mg particles according to the mass ratio of Ca:Mg:Al=15%:20%:65%. Appreciate;

[0032] Step 2, preparation of the quartz glass tube: cut off the required length of the quartz glass tube, and burn and seal one end of the quartz glass tube with a mixed gas of oxygen and liquefied petroleum gas for use;

[0033] Step 3, sealing of raw materials: Put the weighed Ca, Mg and Al raw materials into a quartz glass tube with one end closed, vacuumize the quartz glass t...

Embodiment 2

[0036] This embodiment is an OLED alloy cathode, including 5% Mg, 15% Ca, and 80% Al. Among them, the work function of Al is 4.28ev, the work function of Mg is 3.7ev, and the work function of Ca is 2.87ev. It is formed by melting in a quartz glass tube under vacuum conditions by vacuum melting and then cooling naturally.

[0037] The preparation process is as follows:

[0038] Step 1, preparation of Ca, Mg and Al raw materials: Use an electronic balance of 1 / 10,000 to separate the required Al wire, Ca particles, and Mg particles according to the mass ratio of Ca:Mg:Al=15%:5%:80%. Appreciate;

[0039] Step 2, preparation of the quartz glass tube: cut off the required length of the quartz glass tube, and burn and seal one end of the quartz glass tube with a mixed gas of oxygen and liquefied petroleum gas for use;

[0040] Step 3, sealing of raw materials: Put the weighed Ca, Mg and Al raw materials into a quartz glass tube with one end closed, vacuumize the quartz glass tube ...

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
Work functionaaaaaaaaaa
Work functionaaaaaaaaaa
Work functionaaaaaaaaaa
Login to View More

Abstract

The invention provides an OLED alloy cathode and a preparation method thereof. The OLED alloy cathode is Ca, Mg, Al ternary alloy. The Ca, Mg, and Al are mixed according to a ratio of Ca: Mg: Al = 15%: (5%-25%): (80%-60%) and are formed by being melted through a vacuum melting method in a quartz glass tube under the vacuum condition and being cooled naturally. The Ca-Mg-Al alloy cathode is improved in emissive capability and superior to a Ca: Al alloy cathode OLED device, and can be evaporated by one evaporation boat. As a result, not only is difficulty in operation reduced, but also a film thickness is easier to control and a result is more accurate.

Description

technical field [0001] The invention belongs to the technical field of OLED display and lighting, and in particular relates to an OLED alloy cathode and a preparation method thereof. Background technique [0002] Organic electroluminescent devices belong to carrier injection type light emitting display devices. The electrode is an important factor affecting the performance of OLED devices, that is, whether the positive load carriers can balance injection and effective recombination. If the carrier injection on both sides is unbalanced, excess carriers will reach the electrode, resulting in the quenching of light emission at the electrode, and electrons in most organic light-emitting devices are minority carriers. To improve the performance of the device, it is necessary to increase the electron injection. , that is, to improve the emission ability of cathode electrons. Since most of the LUMO energy levels used in organic materials are between 2.5 and 3.5eV, the lower the w...

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): H01L51/52H01L51/56
CPCH10K71/60H10K50/82
Inventor 张方辉杜帅宋得瑞王璐薇程君李怀坤孙立蓉
Owner 西安拓创光芯科技有限公司
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