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Organic electroluminescent element

An electroluminescent and organic technology, applied in the field of organic electroluminescent elements, can solve the problems of silver ion migration, short circuit, affecting the luminescent effect of silver thin film, etc., and achieve the effect of avoiding deterioration

Active Publication Date: 2017-05-03
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the subsequent discharge process of the device, the current tends to concentrate on the bulge, so that the defective silver film 12 is prone to migration of silver ions, so that the cathode and anode are prone to short circuit, and then produce sub-pixel dark spots when emitting light, which affects the luminous effect

Method used

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  • Organic electroluminescent element
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  • Organic electroluminescent element

Examples

Experimental program
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Effect test

preparation example Construction

[0058] The embodiment of the present invention also provides a method for preparing an organic electroluminescent element, comprising the following steps:

[0059] Step 1: Provide a substrate, which can be a rigid substrate or a flexible substrate, including but not limited to glass substrates, quartz substrates, metal substrates, organic polymer substrates, metal oxide substrates, ultrasonic cleaning, etc. The prior art method for cleaning the substrate;

[0060] Step 2: Fabricate a TFT array on the cleaned glass substrate. The related process includes the following steps. Step 1: Prepare a polysilicon layer, Step 2: Prepare a gate, Step 3: Prepare an insulating layer, and Step 4: Forming a data line layer, step 5: preparing a buffer layer, step 6: preparing a planarization layer;

[0061] Step 3: Prepare organic light-emitting diodes on the TFT array. The related process includes the following steps. Step 1: Prepare anode 1, Step 2: Prepare protective layer 3, Step 3: Prepa...

Embodiment 1

[0065] refer to Figure 4A to Figure 4F After the preparation of the anode 1 is completed, a protective layer 3 made of inorganic materials is prepared on the anode 1 , and the protective layer 3 in this embodiment covers the side surface and part of the upper surface of the anode 1 .

[0066] The preparation process is as follows:

[0067] Step S1: if Figure 4A with Figure 4B As shown, after the preparation of the anode 1 is completed, a protective layer 3 made of inorganic materials is prepared on the side and upper surface of the anode 1;

[0068] Step S2: if Figure 4C As shown, a photoresist mask 4 is formed on the protective layer 3;

[0069] Step S3: if Figure 4D As shown, the protective layer 3 not covered by the photoresist mask 4 is removed by etching;

[0070] Step S4: if Figure 4E As shown, the photoresist mask 4 is stripped off to form a protective layer 3 .

[0071] Step S5: Next, a pixel definition layer 2 is formed on the protective layer 3, such as...

Embodiment 2

[0073] refer to Figure 5A to Figure 5E After the preparation of the anode 1 is completed, a protective layer 3 composed of a conductive semiconductor material is prepared on the anode 1 , and the protective layer 3 in this embodiment covers the side surfaces and the entire upper surface of the anode 1 .

[0074] The preparation process is as follows:

[0075] Step S1': if Figure 5A with Figure 5B As shown, after the preparation of the anode 1 is completed, a protective layer 3 composed of a conductive semiconductor material is prepared on the side and upper surface of the anode 1;

[0076] Step S2': if Figure 5C As shown, a photoresist mask 4 is formed on the protective layer 3 to cover a predetermined area of ​​the protective layer 3;

[0077] Step S3': if Figure 5D As shown, the redundant protective layer structure is etched, and the photoresist mask 4 is stripped to form the protective layer 3 .

[0078] Step S4': then prepare the pixel definition layer 2 on the ...

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Abstract

The invention provides an organic electroluminescent element, which comprises a thin film transistor array substrate and an organic light-emitting diode, and is characterized in that the organic light-emitting diode comprises an anode, an organic functional layer, a cathode, a pixel defining layer, a protection layer and a packaging cover plate; the anode comprises a silver thin film, and the anode is arranged on a thin film transistor array and is electrically connected to a thin film transistor; the organic functional layer comprises at least one organic light-emitting layer and is located on the anode; the cathode is located on the organic functional layer; the pixel defining layer is used for defining a pixel region; the protection layer is located between the anode and the pixel defining layer; and the packaging cover plate is located at a light emitting side of the organic light-emitting diode so as to package the organic light-emitting diode in a sealed space between the packaging cover plate and the thin film transistor array substrate. The protection layer can prevent migration of silver ions, and avoids metamorphism of the silver thin film at the same time.

Description

technical field [0001] The invention relates to an organic electroluminescent element (OLED), in particular to an organic electroluminescent element which prevents silver ion migration and silver film deterioration. Background technique [0002] In OLED display technology, an active organic electroluminescent device (AMOLED) displays images by using current to control organic light-emitting materials to emit light. These devices all need to realize the driving and control function of the current to the organic light-emitting diode through a thin-film transistor (TFT) array substrate. The TFT array substrate includes scanning lines, signal lines and TFTs. Resonance of electrons and holes is carried out in the resonant cavity, and the OLED material is excited to generate light. [0003] In the top-emitting OLED device, the anode uses a reflective anode electrode, and the light emitted by the light-emitting layer is reflected by the reflective anode electrode and emitted from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/52H01L21/77
CPCH10K59/122H10K50/844H10K59/1201
Inventor 丁汉锜林信安林志明
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD