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Printed display device and its preparation method and application

A printing display and device technology, applied in semiconductor/solid-state device manufacturing, semiconductor devices, electric solid-state devices, etc., can solve problems such as high cost, uneven film formation of pixel ink, complex preparation process of pixel defining layer, etc.

Active Publication Date: 2019-02-01
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the pixel defining layer is complicated, the cost is high, and it often causes uneven film formation of the pixel ink

Method used

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  • Printed display device and its preparation method and application
  • Printed display device and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a method for preparing a QLED device. Preferably, this embodiment uses zinc oxide as an electron transport layer to describe the preparation method of the present invention in detail.

[0045] Specifically, the following steps are included:

[0046] S1, forming a first electrode layer and an electron transport layer on the substrate;

[0047] The material of the first electrode layer is not limited, it can be metal or metal alloy, such as aluminum, silver or silver-based alloy, further, a layer of inorganic non-metallic oxide can be wrapped on both sides of the metal or metal alloy to avoid metal oxidation, preferably, the inorganic non-metallic oxide can be ITO, AZO, TZO. The preparation method of the first electrode layer may be thermal evaporation coating, magnetron sputtering, plasma enhanced chemical vapor deposition and other methods.

[0048] S2. Forming an electron transport layer on the first electrode layer;

[0049]The electron tra...

Embodiment 2

[0060] This embodiment provides a display device. The display device includes the QLED device provided by the above embodiments. The display device includes: a mobile phone, a television, a tablet computer, a monitor, a VR / AR device, a computer, a vehicle display, or any product or component with a display function.

[0061] This embodiment provides a QLED display device, its manufacturing method, and a display device, which omits the preparation process of the pixel defining layer, ensures the uniformity of ink pixels, and improves the efficiency, service life and reliability of the device.

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PUM

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Abstract

The present invention relates to a printed display device and its preparation method and application. The printed display device includes a substrate, a first electrode layer, an electron transport layer, a light emitting layer and a second electrode layer; wherein the first electrode layer is located On the substrate; the electron transport layer is located on the first electrode layer, and the surface of the electron transport layer has a hydrophilic region and a hydrophobic region; the light-emitting layer is arranged on the hydrophilic region of the electron transport layer. on the water region; the second electrode layer is on the light emitting layer and the electron transport layer. The above-mentioned printed display device does not contain a pixel defining layer, and the electron transport layer is subjected to patterned hydrophilic and hydrophobic treatment through selective hydrophilic and hydrophobic treatment, so that the printing ink is well limited to the hydrophilic area, which solves the problem of coordinating spraying in the preparation of existing QLED devices. The preparation process of the pixel defining layer used in the ink printing process is complex and costly, which indirectly leads to the problem of uneven film formation of the printing ink.

Description

technical field [0001] The invention relates to the technical field of display devices, in particular to a printed display device and its preparation method and application. Background technique [0002] A quantum dot (quantum dot, QD for short) is a nanoparticle composed of II-VI, III-V or IV-VI elements, which can emit light after being excited. The luminescence wavelength of quantum dots is related to the size of quantum dot particles, so visible light of various wavelengths can be generated by controlling the size of quantum dots. In addition, quantum dot materials have the advantages of high photochromic purity, high efficiency, and long life, and are a promising electroluminescent material. At present, the hole injection layer, hole transport layer, light emitting layer, and electron transport layer in the preparation of QLED devices are mainly formed by solution processing electron dots. Among them, inkjet printing technology is considered to be a very potential pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/56
CPCH10K71/135H10K50/115H10K50/16H10K71/00
Inventor 卢泓
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD