Unlock instant, AI-driven research and patent intelligence for your innovation.

Organic light-emitting element material, organic light-emitting element, and process for producing same

A technology of organic light-emitting elements and manufacturing methods, applied in the direction of light-emitting materials, electroluminescent light sources, chemical instruments and methods, etc., capable of solving high driving voltage, poor luminous efficiency, durability of organic light-emitting elements, and insufficient luminance, etc. problem, to achieve the effect of excellent durability and high external quantum efficiency

Inactive Publication Date: 2012-02-08
RESONAC HOLDINGS CORPORATION
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic light-emitting devices using such hole-transporting materials have the problems of high driving voltage and poor luminous efficiency.
[0004] Japanese Patent Application Laid-Open No. 2002-105445 (Patent Document 1) describes a polymer compound in which a specific pyrrole derivative such as a carbazole derivative is directly bonded to a main chain as an organic light-emitting element material, but an organic light-emitting element using this material The durability, and brightness are insufficient

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 element material, organic light-emitting element, and process for producing same
  • Organic light-emitting element material, organic light-emitting element, and process for producing same
  • Organic light-emitting element material, organic light-emitting element, and process for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0172] [Example 1] Production of organic EL element 1 and its evaluation

[0173] An organic EL element 1 was fabricated using a substrate with ITO (Nippo Electric Co., LTD.) that was formed as an anode by forming stripes on one side of a glass substrate of 25 mm x 25 mm. 2 ITO (indium tin oxide) electrodes with a width of 4mm.

[0174] First, poly(3,4-ethylenedioxythiophene) polystyrene was coated on the ITO (anode) of the above-mentioned substrate with ITO by spin coating at a rotation speed of 3,500 rpm and a coating time of 40 seconds. Sulfonic acid (manufactured by Bayer, trade name "Bytron P") was then dried in a vacuum desiccator at 60° C. for 2 hours under reduced pressure to form an anode buffer layer. The film thickness of the obtained anode buffer layer was about 50 nm.

[0175] Next, a coating solution for forming a layer containing a light-emitting compound and a carrier-transporting compound is prepared. Polymer C-1 (45 mg), the compound (45 mg) represented by...

Embodiment 2～9

[0185] [Examples 2 to 9] Fabrication and Evaluation of Organic EL Elements 2 to 9

[0186] Organic EL elements 2 to 9 were produced in the same manner as in Example 1 except for using the organic light-emitting element materials and other materials described in Table 1, and the emission luminance was measured. The resulting emission start voltage, maximum luminance and 100cd / m 2 Table 2 shows the external quantum efficiency at the time of lighting and the results of the driving life test (durability) performed in the same manner as in Example 1.

Embodiment 10

[0189] [Example 10] Production of organic EL element 14 and its evaluation

[0190] A substrate having pits with a depth of 0.2 to 0.4 μm and a diameter of 6 μm was produced in the same manner as in Example 1 described in WO 01 / 06577 pamphlet.

[0191] Next, a coating solution was produced in the same manner as in Example 1 except that the organic light-emitting element materials and other materials described in Table 3 were used. Next, the prepared coating solution was coated and dried in the same manner as in Example 1 on the surface of the substrate having pits, thereby forming a light emitting layer ( figure 2 In the organic layer 50), the organic EL element 14 is produced.

[0192] The emission luminance of this organic EL element 14 was measured in the same manner as in Example 1. The resulting emission start voltage, maximum luminance and 100cd / m 2 The external quantum efficiency when turned on is shown in Table 4. In addition, except that the luminance half-life t...

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
electron work functionaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Disclosed is an organic light-emitting element material which can be used suitably for producing an organic light-emitting element that can emit light at high brightness and has a high external quantum efficiency and excellent durability. Specifically disclosed is an organic light-emitting element material which is characterized by comprising a polymeric compound containing k mol% of a constituent unit represented by general formula (1a) (wherein 0 < k = 100) and n mol% of a constituent unit represented by general formula (1b) (wherein 0 = n 1 represents a hydrogen atom or a methyl group; R2 and R3 independently represent a hydrogen atom or a substituent, and may be bound together to form a ring; R4 represents a hydrogen atom, or a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heterocyclic, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, alkoxycarbonyl, aryloxycarbonyl, carbamoyl or sulfamoyl group; Z represents an atomic group that forms an aromatic ring; and X represents a bivalent linkage group. In general formula (1b), A represents a copolymerizable monomer unit derived from a vinyl monomer.)

Description

technical field [0001] The present invention relates to an organic light-emitting element material, an organic light-emitting element using the same, and a manufacturing method thereof. Background technique [0002] Active research and development are currently being conducted on various display elements. Among them, an organic light-emitting element (hereinafter also referred to as an "organic EL element") has attracted attention because it can emit high-intensity light at a low voltage, and an organic light-emitting element ( Applied Physics Letters, 51, 913 (1987)). This organic light-emitting element has a structure in which an electron-transporting material and a hole-transporting material are laminated, and its light-emitting characteristics are greatly improved compared to conventional single-layered elements. TPD (N,N'-dimethylphenyl-N,N'-diphenylbenzidine) was used as the hole transport material. Triarylamine derivatives represented by TPD are one of the most eff...

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): H01L51/50C08F212/02C08F224/00C09K11/06H05B33/02H05B33/22H10K99/00
CPCC09K11/06C09K2211/1466H10K85/141H10K85/151H10K85/6572H10K50/11H10K85/658H10K85/322
Inventor 加藤刚
Owner RESONAC HOLDINGS CORPORATION