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Organic electroluminescent device

A technology of electroluminescent devices and light-emitting components, which is applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve problems such as use restrictions, and achieve the effects of reducing damage, improving uniformity of light emission, and improving conductivity

Inactive Publication Date: 2020-04-14
GUAN YEOLIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the needs of various lighting in the prior art, realize a design that does not require pixelation, and does not need to consider whether the input current can activate the short-circuit protection mechanism, and improve the problems of design defects, use restrictions, and appearance defects caused by the prior art , to realize the high-stability lighting screen with integrated light-emitting area; for this reason, the present invention provides an organic electroluminescent device

Method used

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  • Organic electroluminescent device
  • Organic electroluminescent device
  • Organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The present invention provides an organic electroluminescent device, which includes a substrate 1, a first electrode 2, and a light-emitting component 4 from bottom to top. The light-emitting component 4 includes a light-emitting layer, an electron transport layer, a hole transport layer, and a sub-electrode structure 5 is provided on the upper side of the light-emitting component 4 , including a sub-electrode 53 , a dielectric material layer 52 and an outer layer electrode 51 . Such as figure 1 with figure 2 As shown, the sub-electrode is covered on the electron transport layer (not shown in the figure) of the light-emitting component, and a dielectric material layer and an outer layer electrode are sequentially arranged above the sub-electrode. figure 1 The dielectric material layer 52 covers an area larger than the light-emitting area of ​​the light-emitting component, and the coverage area of ​​the dielectric material layer 52 extends to the non-light-emitting are...

Embodiment 2

[0057] Such as image 3 with Figure 4 As shown, the sub-electrode structure in this embodiment is arranged above the light-emitting component, that is, the top of the light-emitting layer is sequentially covered with an electron transport layer (not shown in the figure), a sub-electrode, a dielectric material layer and an outer layer electrode, Below the luminescent layer are hole transport layers (not shown), a first electrode, a dielectric material layer and a substrate in sequence, wherein the dielectric material layer completely covers the entire luminescent area on both sides of the luminescent layer, and the dielectric material layer The covering area is larger than the area of ​​the first electrode, that is, the entire first electrode (except the lead area) is completely covered.

[0058] This embodiment is based on Embodiment 1, and a dielectric material layer is added between the first electrode and the substrate. Here, the first electrode and the sub-electrode are ...

Embodiment 3

[0064] On the basis of Embodiment 2, when the matching outer layer electrode is a reflective outer layer electrode, the outer layer electrode with a reflectivity of 90% can regulate the optical resonant cavity and adjust the light emitting characteristics of the entire light emitting component.

[0065] Calculate the distance from the light-emitting layer to the reflective outer electrode according to the wavelength of the light-emitting layer:

[0066] d=kλ / 4n

[0067] k=1, 3, 5...

[0068] λ: luminescence wavelength

[0069] n: Refractive index

[0070] d: the distance from the light-emitting layer to the electrode

[0071] When the distance conforms to the above formula, the efficiency of the device is improved

[0072] screen structure Current efficiency (cd / A) Conventional screen without grid 15 Example 3 20

[0073] It can be seen from the above table that adding the outer electrode with reflective function can significantly improve the d...

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Abstract

The invention discloses an organic electroluminescent device. The device successively comprises a substrate, a first electrode and a light emitting component arranged on the first electrode from bottom to top. A secondary electrode structure is arranged on an upper side surface of the light-emitting component. The secondary electrode structure comprises a sub-electrode, a dielectric material layerand an outer layer electrode. The dielectric material layer is arranged between the sub-electrode and the outer layer electrode. The sub-electrode is in contact with the light-emitting component, thedielectric material layer and the sub-electrode completely cover a light-emitting area of the light-emitting component, the outer layer electrode completely covers the dielectric material layer, andthe outer layer electrode and the sub-electrode are electrically connected in a non-light-emitting area of a periphery of the light-emitting component. In the invention, the light-emitting component does not need to be pixelated, and a whole-surface non-pixelated screen body structure is preferably adopted so that a ''grid-free'' high-stability device is realized, dependence on an insulating layermaterial is reduced, and cost is saved.

Description

technical field [0001] The invention relates to the technical field of organic semiconductor lighting, in particular to an organic electroluminescence device. Background technique [0002] Dust particles, burrs, pinholes, cracks and other defects inevitably exist in the manufacturing process of OLED screens, and the distance between the anode and cathode of OLED screens is usually very small (about tens to hundreds of nanometers). As a result, in this state, the anode and cathode may come into direct contact causing a defect (called a short point), or the organic layer between the anode and cathode may become thinner than other locations. When the OLED device is working, the current tends to pass through this defect point rather than other locations, so that heat accumulates at this defect point, resulting in damage to the quality and reliability of the entire OLED device. [0003] Under other conditions being the same, the larger the light-emitting area of ​​the OLED scree...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L23/552H01L23/62
CPCH01L23/62H01L23/552H10K50/805H10K50/852H10K50/856H10K50/844H10K50/824Y02E10/549H10K2102/341H10K50/814H10K2102/102H10K2102/103
Inventor 郭立雪朱映光于永超张国辉
Owner GUAN YEOLIGHT TECH CO LTD