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Organic electroluminescent element, display device, and lighting device

一种电致发光元件、致发光的技术，应用在电气元件、电固体器件、电路等方向，能够解决不能得到充分的效率等问题，达到良好发光亮度、黑点少、稳定性高的效果

Inactive Publication Date: 2008-08-13
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the external extraction efficiency near 20% which is the theoretical limit (boundary) can be achieved for green light emission, sufficient efficiency cannot be obtained for light emission of other colors, so improvement is still necessary

Method used

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  • Organic electroluminescent element, display device, and lighting device
  • Organic electroluminescent element, display device, and lighting device
  • Organic electroluminescent element, display device, and lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0237] (Production of organic EL element 1-1)

[0238] As a base material, on a polyethylene naphthalate film (made by Teijin DuPont, hereinafter abbreviated as PEN) with a thickness of 100 μm, under the following atmospheric pressure plasma discharge treatment apparatus and discharge conditions , making a substrate 1 having a gas barrier layer according to the cross-sectional view shown in FIG. 1 .

[0239] (Atmospheric pressure plasma discharge treatment device)

[0240] Using the atmospheric pressure plasma discharge treatment apparatus of FIG. 2 , a roll electrode covered with a dielectric and a plurality of square cylindrical electrode groups were produced as follows.

[0241] As the roll electrode of the first electrode, the titanium alloy T64 jacketed roll metal base material with a cooling water cooling device was coated with a high-density and high-adhesive aluminum sprayed film by the atmospheric plasma method to make the roll diameter 1000mmφ. On the other hand, f...

Embodiment 2

[0319] (Production of organic EL element 2-1)

[0320]Using a commercially available inkjet nozzle 10 in the same manner as in Example 1, the fluid containing the exemplified compound A36 and THF was ejected onto an ITO substrate 100, and a film with a film thickness of 50 nm was formed at 100° C. for 60 minutes. hole transport layer.

[0321] Next, a fluid containing the exemplified compound A31 as the main body, the phosphorescent compound Ir-12 (mass ratio 100:4) and THF was sprayed onto the hole transport layer, and a film was formed at 100° C. for 60 minutes. 50nm thick luminescent layer.

[0322] Next, a fluid containing the exemplified compound A35 and THF was sprayed onto the light-emitting layer, and an electron transport layer with a film thickness of 50 nm was formed at 100° C. for 60 minutes. Then, aluminum 113 (cathode) was vapor-deposited to a thickness of 200 nm on the electron transport layer.

[0323] In addition, the content rate of the organic solvent of ...

Embodiment 3

[0334] The organic EL element 2-4 of the present invention produced in Example 2, the phosphorescent compound of the organic EL element 2-4 of the present invention produced in Example 2 was changed to Ir-1, and the green light-emitting organic EL produced in the same way The red light-emitting organic EL element produced in the same way as the organic EL element 2-4 of the present invention except that the phosphorescent compound is changed to Ir-9 is arranged side by side on the same substrate, and the active matrix method full-color EL element shown in FIG. 4 is fabricated. display device. Fig. 5 shows only a schematic view of the display unit A of the fabricated full-color display device. That is, on the same substrate, there are wiring parts including a plurality of scanning lines 5 and data lines 6, and a plurality of pixels 3 arranged in parallel (pixels in a red area, pixels in a green area, and pixels in a blue area). Pixels, etc.), the scanning line 5 and a pluralit...

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Abstract

An organic electroluminescence element, which has an electrode and at least one organic layer on a substrate, is characterized in that the film density of at least one of the organic layers is 1.10-1.25 g / cm3. It is possible to provide organic EL elements, display devices and lighting devices using the same. The organic EL elements show good luminance, voltage rise when driven by a constant current, less black spots, and stability over time under high temperature and high humidity. high sex.

Description

technical field [0001] The present invention relates to an organic electroluminescent element, and a display device and a lighting device using the organic electroluminescent element. Background technique [0002] Conventionally, there is an electroluminescent display (ELD) as a light-emitting electronic display device. As a constituent element of ELD, an inorganic electroluminescence element or an organic electroluminescence element (it is also called hereafter: an organic EL element) is mentioned. [0003] The organic EL element has a structure in which a light-emitting layer containing a light-emitting compound is sandwiched between a cathode and an anode, and electrons and holes are injected into the light-emitting layer, and excitons (excitons) are generated by recombination, thereby utilizing the excitons to deactivate light The element that emits light (fluorescence or phosphorescence) may emit light at a voltage of several V to tens of V, and since it is a self-lumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50
CPCH10K85/654H10K85/324H10K85/6572H10K50/11H10K2101/10H05B33/12H05B33/14H10K59/30H10K59/00H10K85/10H10K85/00H10K85/60H10K50/125
Inventor 杉田修一北弘志岩丸俊一
Owner MERCK PATENT GMBH
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