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Flexible electroluminescent device and preparation method thereof

An electroluminescence and flexible electricity technology, applied in the field of flexible electroluminescence devices and their preparation processes, can solve the problems of complex preparation process, low material utilization rate and high cost, and achieve the effects of high transparency, reduced preparation cost and air stability

Inactive Publication Date: 2019-02-01
SHANGHAI MI FANG ELECTRONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of the above-mentioned flexible electroluminescent device such as complex preparation process, high cost, and low material utilization rate, and provide a flexible electrochromic device prepared based on a full printing process and a preparation method to realize large-scale flexible electroluminescence. Preparation and application of light-emitting devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Transparent electrode ink configuration: Weigh 0.05g of PEDOT:PSS powder into a 10ml glass bottle, measure 0.95g of deionized water through a pipette gun, slowly add it to the above glass bottle and stir for 2 hours to prepare a 5% concentration PEDOT:PSS ink;

[0043] Preparation of transparent electrode layer: screen-print PEDOT:PSS-based ink on the PET substrate by screen printing, the screen printing pattern is pre-customized, the mesh number is 300 mesh, and the PEDOT:PSS transparent conductive electrode is obtained after drying at 120°C for 1 hour, transparent The electrodes can be fully spread, and can also form independent electrode strips with each other;

[0044] Preparation of luminescent layer: by screen printing method, mix inorganic AC electroluminescent powder material with colloid, evenly print on the transparent conductive layer and dry it;

[0045] Dielectric layer preparation: uniformly print the dielectric material on the light-emitting layer by scr...

Embodiment 2

[0048] Transparent electrode ink configuration: Weigh 0.03g of PEDOT:PSS powder and place it in a 10ml glass bottle. Measure 2.97g of deionized water with a pipette gun, slowly add it into the above glass bottle and stir for 2 hours to prepare PEDOT:PSS ink with a concentration of 1%;

[0049] Preparation of transparent electrode layer: Print PEDOT:PSS-based ink on PET substrate by inkjet printing, and obtain PEDOT:PSS electrode pattern after drying at 120°C for 1 hour. The transparent electrodes can be fully spread, and independent electrode strips can also be formed between each other;

[0050] Preparation of luminescent layer: by screen printing method, mix inorganic AC electroluminescent powder material with colloid, evenly print on the transparent conductive layer and dry it;

[0051] Preparation of the back electrode layer: The electrode paste is evenly printed on the PET by screen printing method, and prepared into the back electrode layer after drying. The back electro...

Embodiment 3

[0055] Transparent electrode ink configuration: Weigh 0.2g of polypyrrole powder and place it in a 10ml glass bottle. Measure 0.8 g of deionized water through a pipette gun, slowly add it to the above-mentioned glass bottle and stir for 3 hours to prepare a polypyrrole ink with a concentration of 20%;

[0056]Preparation of transparent electrode layer: Print polypyrrole-based ink on PEN substrate by inkjet printing, and obtain polypyrrole electrode pattern after drying at 100°C for 1.5 hours. The transparent electrodes can be fully spread, and independent electrode strips can also be formed between each other;

[0057] Preparation of luminescent layer: by screen printing method, mix inorganic DC electroluminescent powder material with colloid, evenly print on transparent conductive layer and dry;

[0058] Preparation of the back electrode layer: The electrode paste is evenly printed on the PEN by screen printing method, and prepared into a back electrode layer after drying. Th...

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PUM

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Abstract

The invention discloses a flexible electroluminescent device and a preparation method thereof. The structure comprises a flexible substrate, a transparent electrode attached to the flexible substrate,a light emitting layer, a dielectric layer and a back electrode layer. The method of preparing the electroluminescent device including the transparent electrode based on a full printing process comprises steps: ink is prepared; an electrode pattern is drawn in advance; the transparent electrode layer, the light emitting layer, the back electrode layer, the dielectric layer and the like are prepared on the flexible substrate in a screen printing mode; and finally, the electroluminescent device is formed. Full printing preparation of the electroluminescent device is realized, complex processessuch as vapor deposition are avoided, the preparation cost of the whole device is reduced, various patterned preparation of the electrode can be realized, and small batches of customized preparation are particularly facilitated.

Description

technical field [0001] The invention belongs to the field of optical devices, in particular to a flexible optical device, in particular to a flexible electroluminescent device and a preparation process thereof. Background technique [0002] Electroluminescence is a physical phenomenon in which an electric field is generated by applying a voltage to two electrodes, and the electrons excited by the electric field hit the luminescent center, which causes the transition, change, and recombination of electrons between energy levels to cause luminescence. [0003] At present, indium tin oxide (ITO) is the most widely used transparent electrode in electroluminescent devices, and ITO is usually grown on rigid glass or flexible substrates by vapor deposition. For example, CN102036434B, a thin-film electroluminescent device and its preparation method, is characterized in that it comprises the following steps: S1: preparing a first insulating layer on the ITO conductive glass layer; S2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/56
CPCH10K71/13H10K71/00
Inventor 任大勇王家林李胜夏
Owner SHANGHAI MI FANG ELECTRONICS LTD
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