Organic electroluminescent element, method for producing organic electroluminescent element, display, and lighting device

一种电致发光元件、有机的技术，应用在电气元件、有机半导体器件、半导体/固态器件制造等方向，能够解决发光寿命短、发光强度降低等问题

Active Publication Date: 2017-07-14
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after storing the organic EL devices formed with these compounds at high temperature, a significant decrease in the luminous intensity was found.
Furthermore, it was found that the emission lifetime at high temperature is also shorter than that at room temperature
In addition, the luminous efficiency also has room for further improvement

Method used

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  • Organic electroluminescent element, method for producing organic electroluminescent element, display, and lighting device
  • Organic electroluminescent element, method for producing organic electroluminescent element, display, and lighting device
  • Organic electroluminescent element, method for producing organic electroluminescent element, display, and lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0481] "Manufacturing of Organic EL Elements 1-1"

[0482] After patterning a substrate (NA45 manufactured by NH Technoglass Co., Ltd.) on which ITO (indium tin oxide) was deposited on a glass substrate of 100 mm × 100 mm × 1.1 mm at a thickness of 100 nm as an anode, the ITO transparent electrode was provided. The transparent support substrate was ultrasonically cleaned with isopropyl alcohol, dried with dry nitrogen, and subjected to UV ozone cleaning for 5 minutes.

[0483] This transparent support substrate was fixed to a substrate holder of a commercially available vacuum evaporation apparatus, and on the other hand, 200 mg of HT-1 was placed in a resistance heating boat made of molybdenum, and HT-1 was placed in another resistance heating boat made of molybdenum. 200 mg of HT-2, 200 mg of comparative compound 1 was loaded into another molybdenum resistance heating boat, 200 mg of DP-1 was loaded into another molybdenum resistance heating boat, and 200 mg of DP-1 was load...

Embodiment 2

[0512] "Production of Organic EL Elements 2-1 to 2-5"

[0513] Organic EL elements 2-1 to 2-5 were produced in the same manner as in the production of organic EL element 1-1 in Example 1, except that comparative compound 1 was changed to the host compound described in Table 2.

[0514] "Evaluation of Organic EL Elements 2-1 to 2-5"

[0515] When evaluating the obtained organic EL elements, they were sealed in the same manner as the organic EL elements 1-1 to 1-12 of Example 1, and produced image 3 , Figure 4 The same items as in Example 1 were evaluated for the lighting device having the structure shown in .

[0516] The evaluation results are shown in Table 2. It should be noted that the external extraction quantum efficiency and the high-temperature half-life are represented by relative values ​​with the organic EL element 2-1 being 100.

[0517] 【Table 2】

[0518]

[0519] As is clear from Table 2, it can be seen that the organic EL elements 2-2 to 2-5 using the c...

Embodiment 3

[0521] "Production of Organic EL Elements 3-1 to 3-12"

[0522] In the preparation of the organic EL element 1-1 of Example 1, except that the comparative compound 1 used in the light-emitting layer was changed to GH-1, and ET-1 was changed to the electron transport material described in Table 3, similarly produced Organic EL elements 3-1 to 3-12.

[0523]"Evaluation of Organic EL Elements 3-1 to 3-12"

[0524] When evaluating the obtained organic EL elements, they were sealed in the same manner as the organic EL elements 1-1 to 1-12 of Example 1, and produced image 3 , Figure 4 The following evaluations were performed on the lighting device having the structure shown in .

[0525] (1) External extraction quantum efficiency, (2) high-temperature half-life, and (3) high-temperature storage stability were evaluated in the same manner as in Example 1.

[0526] (4) Driving voltage

[0527] The organic EL elements were measured at room temperature (about 23°C ~ 25°C), 2.5mA / ...

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PUM

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Abstract

The invention relates to an organic electroluminescent element, a method for producing organic electroluminescent element, a display, and a lighting device. Provided are the organic electroluminescent (EL) element having high luminescent efficiency, a small aging change in luminescent intensity even after the organic EL element is stored at a high temperature together with a long luminescent lifetime at a high temperature, and the method for producing the organic EL element. Further, a display and a lighting device including the organic EL element are also provided. The organic EL element contains an organic layer provided between at least a pair of a cathode and an anode. The organic layer is formed of at least one layer including a luminescent layer, and at least one layer forming the organic layer contains at least one of the compounds represented by the general formulae (A1) to (A5).

Description

technical field [0001] The invention relates to an organic electroluminescent element, a method for manufacturing the organic electroluminescent element, a display device and an illuminating device. Background technique [0002] An organic electroluminescence element (hereinafter also referred to as an "organic EL element") is a thin-film type all-solid-state element composed of an organic thin film layer (single-layer part or multi-layer part) containing an organic light-emitting substance between the anode and the cathode. When a voltage is applied to such an organic EL element, electrons are injected from the cathode and holes are injected into the organic thin film layer from the anode, and these recombine in the light-emitting layer (layer containing an organic light-emitting substance) to generate excitons. The organic EL element is a light-emitting element utilizing light emission (fluorescence and phosphorescence) from these excitons, and is a technology expected as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54
CPCH10K85/654H10K85/6574H10K85/657H10K50/121H10K85/6572H10K50/16C07D405/14C07D403/14C07D519/00C07D491/048H10K50/11H10K2101/10C09K11/06C09K2211/1033C09K2211/1088C09K2211/1029H10K59/10C09K11/025C09K2211/185C09K2211/1007H10K85/342
Inventor 石代圭子大津信也关根昇
Owner MERCK PATENT GMBH
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