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Method for processing flexible OLED through printing micromolecule ink technology

A technology of small molecules and inks, applied in the field of organic electroluminescent display devices, can solve the problems of long production time, high price of OLED displays, and difficulty in guaranteeing product yield, so as to improve the luminous efficiency and lifespan, and facilitate printing. Processing technology, the effect of processing technology simplification

Inactive Publication Date: 2014-08-27
JIANGSU SHENGMEI IND TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the coating of small molecule materials must be realized in a vacuum. It is very complicated to complete the coating process in an ultra-clean space with huge production equipment, and the large-sized evaporation template shadow mask makes the production time longer and the output is extremely low. As long as there is one layer of coating If it fails, the entire device will be scrapped, making it very difficult to guarantee the yield of the product, so the price of OLED displays in the existing market remains high

Method used

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  • Method for processing flexible OLED through printing micromolecule ink technology
  • Method for processing flexible OLED through printing micromolecule ink technology
  • Method for processing flexible OLED through printing micromolecule ink technology

Examples

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Embodiment 1

[0038] An organic electroluminescence display device, comprising a 30×30mm silver nanowire coated 2 The PET board is used as the anode, the hole injection layer, the hole transport layer, the light emitting layer and the LiF / Al cathode are laminated in sequence.

[0039] Hole injection layer: the ratio of PEDOT:PSS aqueous solution doped with water is 1:99, and the ratio of PEDOT:PSS is 1:15. Add proper amount of surfactant 3,4-ethylidene dioxythiophene, adjust its rheological parameters, surface tension: 25-40mN / m, apparent viscosity 10-14mPa·s. The PEDOT:PSS ink is deposited on the substrate by inkjet printing. Use Spectra Galaxy PH256 / 50AAA inkjet head. Nozzle pitch is 254 microns, ink drop volume is 50pl. The stable satellite-free droplets are formed by adjusting the electric pulse and driving voltage. The thickness of the hole injection layer is 100 nm.

[0040] Hole transport layer: lipophilic cross-linkable phenolic resin and aromatic amine compound with a molecular weigh...

Embodiment 2

[0046] A method for processing flexible OLED by printing small molecule ink technology. The steps at least include preparing a hole injection layer, a hole transport layer and a light-emitting layer, in order: first PEDOT:PSS, then the hole transport layer, and then the light-emitting layer . According to the conventional method, a cathode and an anode are prepared on both sides of the membrane.

[0047] Among them, the preparation of the hole injection layer:

[0048] Step 1.1. Use hydrophilic PEDOT:PSS particle ink as raw material to be doped with water in proportion to the requirements, and add surfactant to adjust the rheological parameters of the mixed solution to prepare the ink material of the hole injection layer;

[0049] Step 1.2. Since the OLED display requires a specific coating pattern, the hole injection layer coating pattern is generated by the non-contact coating in the early stage and the laser elimination method or the direct inkjet printing method in the later sta...

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Abstract

The invention relates to a method for processing a flexible OLED through the printing micromolecule ink technology. The method comprises the following steps that a hole injection layer, a hole transmission layer, a lighting layer and a cathode are prepared on an anode substrate material in an ink-jet printing mode, and hydrophilic PEDOT is adopted; the hole injection layer is prepared on an anode substrate material through PSS particle ink; lipophilic crosslinking and a arylamine composite are adopted to be dissolved in a aromatic solvent to serve as the ink, then the hole transmission layer is printed on the hole injection layer in the ink-jet printing mode; a high triplet state phosphorescence micromolecule material of host 1 and host 2 are adopted as a main lighting material, a dopant dye matched with the main material is adopted, the host 1, the host 2 and the dopant dye are mixed together in the solvent without chlorine to serve as a lighting micromolecule ink material, and the lighting layer is prepared on the hole transmission layer in the ink-jet printing mode.

Description

Technical field [0001] The invention relates to an organic electroluminescence display device (OLED), in particular to a method for processing a flexible OLED by printing small molecule ink technology. Background technique [0002] Organic electroluminescence technology (OLED) as a new generation of display technology, compared with the current mainstream liquid crystal display technology, has ultra-light and thin, active light emission, high brightness, high contrast, wide viewing angle, fast response, high luminous efficiency, and temperature adaptation The advantages of good performance, simple production process, low driving voltage, low energy consumption, flexible folding, etc., have received extensive attention from the industry and are considered to be one of the most competitive new generation flat panel display technologies. It has become today's flat panel display technology. Popular research. [0003] Organic electroluminescent display screens can be divided into two c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/56
CPCH10K71/00
Inventor 任茂胜刘腾蛟范江峰
Owner JIANGSU SHENGMEI IND TECH GRP
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