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

Light-emitting element, light-emitting device, electronic equipment, and lighting device

A technology of light-emitting components and light-emitting devices, applied in lighting devices, electroluminescent light sources, electrical components, etc., to achieve high external quantum efficiency, improve luminous efficiency, and high energy transfer efficiency

Inactive Publication Date: 2017-04-12
SEMICON ENERGY LAB CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the light extraction efficiency of current light-emitting elements is considered to be about 20% to 30%, and even considering light absorption by reflective electrodes or transparent electrodes, the limit of external quantum efficiency of light-emitting elements using phosphorescent compounds is considered to be about 25%.

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
  • Light-emitting element, light-emitting device, electronic equipment, and lighting device
  • Light-emitting element, light-emitting device, electronic equipment, and lighting device
  • Light-emitting element, light-emitting device, electronic equipment, and lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0077] In this embodiment mode, the concept of constituting the light-emitting element of one embodiment of the present invention and the specific structure of the light-emitting element will be described. In addition, a light-emitting element according to one aspect of the present invention is a light-emitting element formed by sandwiching an EL layer including a light-emitting layer between a pair of electrodes (anode and cathode), wherein the light-emitting layer contains at least triplet excited The state can be converted into the first luminescent substance (guest material) that emits light, the first organic compound with electron transport (host material) and the second organic compound with hole transport (auxiliary material), and has a first light-emitting layer A stacked structure of a second light-emitting layer, the first light-emitting layer is formed on the anode side, and the second light-emitting layer at least contains a second light-emitting substance (guest m...

Embodiment approach 2

[0126] In this embodiment, refer to Figure 5 An example of a light-emitting element according to one aspect of the present invention will be described.

[0127] In the light-emitting element shown in this embodiment mode, as Figure 5 As shown, an EL layer 203 including a light emitting layer 206 is sandwiched between a pair of electrodes (a first electrode (anode) 201 and a second electrode (cathode) 202). The EL layer 203 has a first light emitting layer 206a and a second In addition to the light emitting layer 206 of the laminated structure of the light emitting layer 206b, a hole injection layer 204, a hole transport layer 205, an electron transport layer 207, an electron injection layer 208, and the like are included.

[0128] In addition, the light-emitting layer 206 shown in this embodiment mode has a laminated structure of a first light-emitting layer 206a and a second light-emitting layer 206b. In the first light-emitting layer 206a in the light-emitting layer 206,...

Embodiment approach 3

[0156] In this embodiment mode, a light-emitting element having a structure having a plurality of EL layers (hereinafter referred to as a tandem light-emitting element) with a charge generation layer interposed therebetween will be described as one aspect of the present invention.

[0157] The light-emitting element shown in this embodiment is as follows Figure 6A A tandem light emitting element having a plurality of EL layers (first EL layer 302(1) and second EL layer 302(2)) between a pair of electrodes (first electrode 301 and second electrode 304) as shown .

[0158] In the present embodiment, the first electrode 301 is an electrode serving as an anode, and the second electrode 304 is an electrode serving as a cathode. In addition, as the first electrode 301 and the second electrode 304, the same configuration as that of the first embodiment can be employed. In addition, either or both of the plurality of EL layers (the first EL layer 302 ( 1 ) and the second EL layer 3...

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
reflectanceaaaaaaaaaa
reflectanceaaaaaaaaaa
Login to View More

Abstract

The present invention provides a light-emitting element with high external quantum efficiency. In addition, the present invention provides a light-emitting element with a long life. One aspect of the present invention is a light-emitting element including: a light-emitting layer between an anode and a cathode, wherein the light-emitting layer at least includes a first light-emitting substance that converts triplet excited state energy into light emission, a first organic material with electron transport properties, compound and a second organic compound with hole transport properties, and has a laminated structure of a first light-emitting layer and a second light-emitting layer, the first light-emitting layer is formed on the anode side, and the second light-emitting layer contains at least three The excited state can be converted into a second luminescent substance that emits light, a second organic compound, and a third organic compound with electron transport properties, the LUMO energy level of the first organic compound is higher than the LUMO energy level of the third organic compound, and the first luminescent The substance is a substance whose wavelength is shorter than that of light emitted from the second light-emitting substance, and the first organic compound and the second organic compound and the second organic compound and the third organic compound form exciplexes, respectively.

Description

technical field [0001] One aspect of the present invention relates to a light-emitting element in which an organic compound that emits light by applying an electric field is sandwiched between a pair of electrodes. Moreover, one aspect of the present invention relates to a light-emitting device, electronic equipment, and lighting device including such a light-emitting element. Background technique [0002] A light-emitting device in which an organic compound is used as a light-emitting body, which has characteristics such as thinness and light weight, high-speed response, and DC low-voltage drive, is expected to be applied to next-generation flat panel displays. In particular, it is considered that a display device in which light-emitting elements are arranged in a matrix has an advantage of having a wider viewing angle and excellent visibility than conventional liquid crystal display devices. [0003] It is generally believed that the light emitting mechanism of a light em...

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 Patents(China)
IPC IPC(8): H01L51/50H01L51/54C09K11/06H05B33/14
CPCH05B33/14H10K85/633H10K85/631H10K85/654H10K85/6576H10K85/6572H10K85/342H10K50/11H10K2101/40H10K50/13H10K2101/10H10K2101/90H10K2101/30C09K11/06H10K50/155H10K50/165
Inventor 濑尾哲史濑尾广美
Owner SEMICON ENERGY LAB CO LTD
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