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A kind of oled device structure and preparation method

A device structure and thin film technology, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, and electric solid-state devices, etc., can solve the problems of affecting the light transmittance of the device, poor barrier performance, and reducing the light extraction efficiency of the device, so as to improve the light extraction efficiency. , The production method is simple, and the effect of increasing the light output efficiency

Active Publication Date: 2019-08-09
FUZHOU UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

The currently used thin film packaging technology overcomes the disadvantages of sealant’s poor barrier performance to water vapor and oxygen, and improves the packaging effect, but the barrier performance to water vapor and oxygen is still not high enough, and the life of the device is still not satisfactory. commercial needs
In addition, the use of organic / inorganic stacked packaging or inorganic / inorganic stacked packaging often affects the light transmittance of the device, resulting in a decrease in the light extraction efficiency of the device, thereby affecting the luminous brightness and luminous efficiency

Method used

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  • A kind of oled device structure and preparation method
  • A kind of oled device structure and preparation method
  • A kind of oled device structure and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like figure 1 As shown, an OLED device structure is suitable for bottom-emitting OLED devices, including:

[0041] A substrate 01, the substrate 01 comprising a glass substrate or a polymer substrate;

[0042] The first water-oxygen barrier layer 02 with high light transmittance is arranged on the substrate 01, such as figure 2As shown, the first water-oxygen barrier layer 02 is alternately formed by the first low-refractive index film 021 and the first high-refractive index film 022 from bottom to top according to the number of alternating cycles m+0.5, m takes a positive integer, and 0.5 represents The topmost layer of the first water-oxygen barrier layer 02 is the first low-refractive index film 021, that is, an additional layer of low-refractive index film is coated on the film layer to form a low / high / low sandwich structure. The first low-refractive index film 021 The refractive index is smaller than the refractive index of the first high refractive index film 0...

Embodiment 2

[0073] The difference between this embodiment and Embodiment 1 is that the positions of the first water-oxygen barrier layer 02 and the second water-oxygen barrier layer 04 are reversed in the structure of the OLED device, and a second water-oxygen barrier layer with high optical reflectivity is arranged above the substrate 01. Oxygen barrier layer 04, the first water and oxygen barrier layer 02 with high light transmittance is arranged on the OLED unit 03, which is suitable for top-emitting OLED devices. The specific structure is:

[0074] The cross-sections of the second water-oxygen barrier layer 04 and the anode 031 are L-shaped, the short side of the second water-oxygen barrier layer 04 is located on the electron injection layer 036, and the long side of the second water-oxygen barrier layer 04 is vertically downward and The long-side inner wall of the second water-oxygen barrier layer 04 is close to the vertical end faces of the hole injection layer 032, the hole transpo...

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Abstract

The present invention involves an OLED device structure and preparation method. The OLED device structure includes a substrate; the first water oxygen obstruction layer is set on the substrate, which is stacked by two thin film with high and low refractive index. On the one hand, it is used to increase it to increaseOLED's outlet efficiency of light emitting light is used as a packaging layer for blocking water vapor and oxygen; a OLED unit is located above the first water oxygen obstruction layer;The stacks of two thin film with high and low refractive index are used to reflect OLED light on the one hand, and on the other hand as the packaging layer to block water vapor and oxygen.Compared with existing technology, although the invention is complicated, the operation is simple, the materials are easy to buy, and the effect is significant. It can effectively improve the life and light extraction efficiency of OLED devices.

Description

technical field [0001] The invention relates to the field of organic light emitting diodes, in particular to an OLED device structure and a preparation method. Background technique [0002] As a new generation of display technology, Organic Light Emitting Display (OLED) has the advantages of active light emission, fast response and high contrast. The most attractive thing is that it can be flexible. It has broad application prospects. However, organic light-emitting materials are sensitive to chemical and physical environments, especially to water and oxygen, and the device is prone to aging and has a short service life. Therefore, in order to achieve mass production of OLED devices, the packaging reliability must be solved. [0003] At present, the commonly used packaging methods are (1) The traditional OLED packaging technology generally adds a cover to the device, and attaches a desiccant to the inside of the cover, and then combines the substrate and the cover with a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/56
CPCH10K50/00H10K50/84H10K50/8445H10K71/00
Inventor 周雄图翁雅恋张永爱郭太良李福山杨尊先叶芸
Owner FUZHOU UNIV
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