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Preparation method of organic electroluminescent devices

An electroluminescent device, an organic technology, applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of low yield and achieve the effects of reduced production costs, uniform luminescence, and fewer processes

Inactive Publication Date: 2011-08-17
广西荷美新能源车辆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing an organic electroluminescent device with a high yield and easy preparation in order to overcome the shortcomings of the low yield of the organic electroluminescent device preparation method in the prior art

Method used

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  • Preparation method of organic electroluminescent devices
  • Preparation method of organic electroluminescent devices
  • Preparation method of organic electroluminescent devices

Examples

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preparation example Construction

[0014] The preparation method of the organic electroluminescence device of the present invention comprises:

[0015] A group of parallel electrode strips are formed on the substrate, and the anodes are formed by these parallel electrode strips; a photosensitive organic polymer layer is covered on the electrode strips and the substrate between the electrode strips, and the resulting photosensitive organic polymer layer Perform masking, exposure and development to obtain a set of parallel isolation columns;

[0016] The conditions of the mask, exposure and development make the width of the upper surface of the formed isolation column 20 μm-100 μm, the shortest distance between the upper surfaces of two adjacent isolation columns is 200 μm-800 μm, the upper surface of the isolation column The width of the surface is smaller than the width of the bottom surface, the middle minimum width of the spacer column is less than or equal to the width of the upper surface, the length direct...

Embodiment 1

[0036] This example illustrates the organic electroluminescent device of the present invention and its preparation method.

[0037] (1) Preparation of anode

[0038] Indium tin oxide (ITO) film with a thickness of 150nm was formed by sputtering on a glass substrate (Leybold Hi-Tech, ITO_B0.7_STN25_R), and then a group of parallel electrode strips were formed by photolithography. The line width of the electrode strips was 500μm. The pitch is 40 μm. Then, wash and dry.

[0039] (2) Preparation of isolation column

[0040] Spin coat one layer of photosensitive polyimide (Beijing Bomi Technology Co., Ltd.) slurry on the anode that step (1) forms, then carry out pre-baking process, the temperature of described pre-baking is 110 ℃, the time of pre-baking is 15 min; forming a photosensitive polyimide layer with a thickness of 10 μm on the anode.

[0041] Then the stainless steel mask plate (Shenzhen Shuoke screen plate Co., Ltd.) is aligned with the photosensitive polyimide layer...

Embodiment 2

[0053] Prepare an organic electroluminescent device according to the method of Example 1, the difference is that step (2) is implemented as follows:

[0054] Spin coat one layer of photosensitive polyimide (Beijing Bomi Technology Co., Ltd.) slurry on the anode that step (1) forms, then carry out pre-baking process, the temperature of described pre-baking is 110 ℃, the time of pre-baking is 15 min; forming a photosensitive polyimide layer with a thickness of 3 μm on the anode.

[0055] Then the stainless steel mask plate (Shenzhen Shuoke screen plate Co., Ltd.) is aligned with the photosensitive polyimide layer of the glass substrate. The pattern of the mask plate makes the width of the upper surface of the spacer column 90 μm, adjacent to each other. The shortest distance between the upper surfaces of two spacers is 200 μm. Expose the glass substrate by UV light (245nm) with an exposure dose of 20mJ / cm 2 , the exposure time is 8s;

[0056] The exposed glass substrate is po...

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Abstract

The invention provides a preparation method of organic electroluminescent devices and is characterized in that in the method, by adopting the conditions of film-masking, light exposure and photographic developing, the width of the upper surface of prepared separation pillars is 20mu m-100mu m, the shortest distance between the upper surfaces of the two adjacent separation pillars is 200mu m-800mum, the width of the upper surfaces of the prepared separation pillars is less than the width of bottom surfaces, the smallest middle width of the separation pillars is less than or equal to the widthof the upper surfaces, the length direction of the separation pillars is vertical to the length direction of electrodes, the transverse section of the separation pillars in the direction of the length direction of the separation pillars is vertical to a substrate, the upper surfaces of the separation pillars are far away the substrate and the bottom surfaces are opposite to the upper surfaces. The preparation method of the organic electroluminescent devices of the invention has less processes, convenient method, low production cost and high yield.

Description

technical field [0001] The invention relates to a preparation method of an organic electroluminescent device. Background technique [0002] Organic electroluminescent devices, namely OLED (organic electroluminescent devices), are self-luminous devices that do not require LED backlight panels, wide viewing angles, uniform image quality, fast response, easy colorization, and simple drive circuits. It can achieve the advantages of luminescence, simple process, can be made into a flexible panel, and conforms to the principle of lightness, thinness and shortness. Therefore, it has become a hot spot pursued by various manufacturers. [0003] Organic electroluminescent devices generally include: a transparent substrate (glass or plastic), an anode (first electrode) on the transparent substrate, an organic functional layer on the anode, and a cathode (second electrode) on the organic functional layer. A layer may be a single layer or multiple layers. By applying positive and negat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/56
Inventor 文东费春红
Owner 广西荷美新能源车辆科技有限公司
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