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Thin-film LED substrate for printing, printed thin-film LED device, and preparation method thereof

An LED device and printing technology are applied in the field of printing thin-film LED substrates, printing thin-film LED devices and their preparation fields, and can solve the problems of cumbersome preparation process, unfavorable LED functional layer ink printing, complex groove substrate structure, etc. , to achieve the effect of high design flexibility, simplified process complexity and high resolution

Active Publication Date: 2020-03-24
武汉国创科光电装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a thin-film LED substrate for printing and its preparation method, which aims to solve the problems of the existing printing groove substrate with complex structure, cumbersome preparation process, and unfavorable printing of LED functional layer ink

Method used

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  • Thin-film LED substrate for printing, printed thin-film LED device, and preparation method thereof
  • Thin-film LED substrate for printing, printed thin-film LED device, and preparation method thereof

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preparation example Construction

[0033] Correspondingly, combine figure 1 , as an implementation situation, an embodiment of the present invention provides a method for preparing a thin film LED substrate for printing, including the following steps:

[0034] S01. provide first substrate 1 and second substrate 1 ', deposit first graphene layer 2 ', second graphene layer 3 " on described first substrate 1, second substrate 1 ' respectively;

[0035] S02. After the second graphene layer 3 "is subjected to surface modification treatment, it is transferred to the surface of the first graphene layer 2' to form a composite graphene layer;

[0036] S03. According to the preset pixel array of the printed thin-film LED device, the composite graphene layer is patterned to form a patterned composite layer to obtain a thin-film LED substrate for printing.

[0037] Specifically, in the above step S01, the selection of the first substrate 1 and the second substrate 1' is not strictly selected. For details, refer to the abo...

Embodiment 1

[0072] A method for preparing a printed QLED device, comprising the following steps:

[0073] E11. Prepare QLED substrate for printing, including

[0074] E111. Depositing a first graphene layer on the first substrate by CVD, and depositing a second graphene layer on the second substrate;

[0075] E112. Utilizing concentrated sulfuric acid to carry out surface modification treatment on the second graphene layer, introducing active functional groups; transferring the second graphene layer after the surface modification treatment to the surface of the first graphene layer to form composite graphite vinyl layer;

[0076] E113. Plasma etching the composite graphene layer to form a patterned composite layer to obtain a QLED substrate for printing.

[0077] E12. Printing a CdSe / ZnS quantum dot light-emitting layer and a ZnO electron transport layer sequentially on the patterned composite layer in the QLED substrate for printing, and depositing an Al cathode to obtain a printed QLE...

Embodiment 2

[0079] A method for preparing a printed OLED device, comprising the following steps:

[0080] E21. Preparation of OLED substrate for printing, including

[0081] E211. Depositing a first graphene layer on the first substrate by CVD method, and depositing a second graphene layer on the second substrate;

[0082] E212. Using concentrated sulfuric acid to carry out surface modification treatment on the second graphene layer to introduce active functional groups; transfer the surface modification treatment of the second graphene layer to the surface of the first graphene layer to form composite graphite vinyl layer;

[0083] E213. Plasma etching the composite graphene layer to form a patterned composite layer to obtain an OLED substrate for printing.

[0084] E22. Printing the light-emitting layer / electron transport layer sequentially in the groove area of ​​the OLED substrate for printing, and depositing the Al cathode to obtain a printed OLED device.

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Abstract

The invention provides a thin film LED substrate for printing. The LED substrate for printing is a groove substrate, including a substrate, and a patterned composite layer arranged on the substrate, and the patterned composite layer forms a printed substrate. A pixel array of type thin film LED, wherein the patterned composite layer includes a first graphene layer and a second patterned graphene layer sequentially arranged on the substrate, and the second patterned graphene layer is on the back The surface of the substrate is modified with active functional groups.

Description

technical field [0001] The invention belongs to the technical field of light-emitting diodes, in particular to a thin-film LED substrate for printing, a printed thin-film LED device and a preparation method thereof. Background technique [0002] At present, in the preparation technology of thin film LED, the most promising production process for large-scale industrialization is the ink printing method. For traditional printed thin-film LED devices, the light-emitting layer ink or other functional layer ink is generally printed on a strip-shaped groove substrate with an array, and a thin film is deposited after the solvent evaporates. However, in the printing process, the formulation of the luminous layer ink or functional layer ink, the quality of the printing substrate, and the accuracy of the printing equipment all have a crucial impact on the uniformity of the film layer, which can easily cause "coffee rings". "And other phenomena such as uneven film formation. In addit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/20H01L33/40H01L33/14H01L33/00H01L51/50H01L51/52H01L51/56
CPCH01L33/005H01L33/14H01L33/20H01L33/40H01L2933/0016H10K50/15H10K50/17H10K50/81H10K71/00
Inventor 曹蔚然梁柱荣刘佳
Owner 武汉国创科光电装备有限公司
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