CN102056361B - Graphene electroluminescent display device and manufacturing method thereof - Google Patents
Graphene electroluminescent display device and manufacturing method thereof Download PDFInfo
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- CN102056361B CN102056361B CN201010283104XA CN201010283104A CN102056361B CN 102056361 B CN102056361 B CN 102056361B CN 201010283104X A CN201010283104X A CN 201010283104XA CN 201010283104 A CN201010283104 A CN 201010283104A CN 102056361 B CN102056361 B CN 102056361B
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Abstract
The invention relates to a graphene electroluminescent display device and a manufacturing method thereof. The graphene electroluminescent display device comprises a luminous layer and a dielectric layer, as well as a lower plate electrode and an upper plate electrode which are positioned on two sides of the luminous layer and the dielectric layer, and the graphene electroluminescent display device is characterized in that the lower plate electrode and the upper plate electrode adopt graphene. The invention further provides the manufacturing method of the graphene electroluminescent display device, which comprises the following steps: step 1) washing a transparent plastic substrate clean; step 2) forming a graphene film on the transparent plastic substrate for constituting the lower plate electrode; step 3) forming the luminous layer on the graphene film of the lower plate electrode; step 4) forming the dielectric layer on the luminous layer; and step 5) forming the graphene film on the dielectric layer for constituting the upper plate electrode. The graphene electroluminescent display device has the benefits that the lower plate electrode and the upper plate electrode adopting thegraphene material have good flexibility, the electroluminescent display device also has good flexibility, and the application range of the electroluminescent display device is further expanded.
Description
Technical field
The invention belongs to Display Technique field, plane, relate in particular to a kind of electroluminescence Display Technique field.
Background technology
Electroluminescence (ElectroLuminescences, be called for short EL) display device can be divided into two types of AC electroluminescence display device and dc electroluminescence display devices from the character of driving power, and the AC electroluminescence display device places luminescent powder and medium powder between lower plate electrode and the upper flat plate electrode and constitutes; Its structure is a sandwich type structure; Lower plate electrode is a nesa coating, and light penetrates from here, and the material of upper flat plate electrode is mainly silver or gold; Luminescent powder mainly is a zinc sulphide; When alternating voltage was added on lower plate electrode and the upper flat plate electrode, alternating electric field made the transition of zinc sulphide quantum generation excitation formula, thereby charges and discharge in the circulation luminous at each; When zinc sulphide contains different activator, can send the light of different colours.The brightness of electro-luminescence display device changes with the change of interelectrode voltage, frequency, and brightness increases with the increase of voltage and frequency generally speaking.
The material of the nesa coating that the lower plate electrode of prior art adopts mainly is tin indium oxide (ITO) material; Tin indium oxide (ITO) is an inorganic matter, and its flexibility is less, reaches at 4% o'clock at stress usually; The conductivity of this nesa coating is damaged; Contained indium is a strategic resource in tin indium oxide (ITO) material in addition, rare material, and 500 tons of less thaies are produced in the whole world per year.And precious metal materials such as the silver of upper flat plate electrodes use or gold can not bear big stress equally.The deficiency that these materials are selected has all had a strong impact on electro-luminescence display device and has used at coml, especially in flexibility, and the application of flexible electro-luminescence display device aspect.
2004, the strong K of the peace moral of Univ Manchester UK sea nurse was prepared Graphene the first time such as (Andre K.Geim).Graphene is a kind of six side's alveolate textures that formed by the monolayer carbon atom, and it has high conductivity, and its conductivity and copper are suitable.Graphene is the material that has high Young's modulus in the material of finding at present, its conductivity stretch, crooked more than 40%, still do not influence its conductivity.In addition, can obtain large tracts of land, Graphene cheaply through existing ripe chemical vapour deposition technique or chemical reduction method, Graphene in this case has higher conductivity simultaneously, and this lays the foundation for preparation flexible el display device.
Summary of the invention
The objective of the invention is to have proposed the Graphene electro-luminescence display device in order to overcome the flexible not enough shortcoming of existing electro-luminescence display device lower plate electrode and upper flat plate electrode.
To achieve these goals; Technical scheme of the present invention is: the Graphene electro-luminescence display device; Comprise luminescent layer and dielectric layer and be positioned at luminescent layer and the lower plate electrode of dielectric layer both sides and upper flat plate electrode, it is characterized in that, said lower plate electrode and upper flat plate electrodes use Graphene.
To achieve these goals, the present invention also provides the manufacturing approach of Graphene electro-luminescence display device, comprises step:
Step 1. cleans up transparent plastic substrates;
Step 4. forms dielectric layer on luminescent layer;
Step 5. forms the upper flat plate electrode that graphene film constitutes on dielectric layer;
Above-mentioned manufacturing approach also comprises: step 6. is connected lead-in wire with the graphene film of lower plate electrode and the graphene film of upper flat plate electrode through lead-in wire respectively separately outward.
Beneficial effect of the present invention: because graphene conductive property is strong; With low cost; And has good flexibility; Therefore adopt the lower plate electrode of grapheme material and upper flat plate electrode all to have good flexibility, electro-luminescence display device also has good flexibility, thereby has enlarged the range of application of electro-luminescence display device.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Description of reference numerals: transparent plastic substrates 1, lower plate electrode 2, luminescent layer 3, dielectric layer 4, upper flat plate electrode 5.
Embodiment
Below in conjunction with specific embodiment the present invention is described further, but the present invention is not limited to following examples.
Embodiment 1: as shown in Figure 1, the Graphene electro-luminescence display device comprises luminescent layer 3 and dielectric layer 4 and is positioned at luminescent layer 3 and the lower plate electrode 2 and upper flat plate electrode 5 of dielectric layer 4 both sides that said lower plate electrode 2 adopts Graphenes with upper flat plate electrode 5; Lower plate electrode 2 is positioned on the transparent plastic substrates 1.
The manufacturing approach of above-mentioned Graphene electro-luminescence display device comprises step:
Step 1. cleans up transparent plastic substrates; Transparent plastic substrates requires light transmittance more than 90% in the present embodiment, and material can be selected PET or PE for use.
Step 4. forms dielectric layer on luminescent layer; Dielectric layer is that medium powder is scattered in the solution, is formed on the luminescent layer through spin-coating method, under 100～150 degree, dries then; Wherein medium powder can be the organic media powder, like PMMA; Can be the inorganic medium powder also, like perovskite oxide, dielectric oxide, dispersion soln is the epoxy resin that contains 0.1% curing agent.
Step 5. forms the upper flat plate electrode that graphene film constitutes on dielectric layer; Present embodiment is to be formed on this dielectric layer through the Graphene of spin-coating method with the chemical method preparation in the method that forms graphene film on the dielectric layer;
Step 6. is connected the graphene film of lower plate electrode and the graphene film of upper flat plate electrode through lead-in wire respectively separately outward, and lead-in wire adopts aluminum steel or copper cash.
Embodiment 2: in the present embodiment; Step 2 constitutes lower plate electrode or step 5 and is formed on this plastic substrate or the dielectric layer through the method that shifts for the Graphene that chemical vapour deposition technique is obtained at the concrete grammar that forms the upper flat plate electrode that graphene film constitutes on the dielectric layer forming graphene film on the transparent plastic substrates, and all the other steps are identical with embodiment 1.
In embodiment 2, the detailed process that forms the large-area high-quality Graphene through the method that shifts in step 2 and the step 5 is:
Step 21. places tinsel in the chemical gas-phase deposition system cavity; Feed the hydrogen of 1～1000Pa, be heated to 700～1000 ℃ and be incubated 20 minutes, and then feed the hydrocarbon gas of 0.1～1000Pa; Be incubated 10～60 minutes again; Speed with 5～80 ℃/minute is reduced to room temperature, closes hydrogen and hydrocarbon gas, on tinsel, obtains graphene film;
Step 22. through spin coating, spraying, curtain coating or directly drip and form organic colloid, in 80～180 ℃ of bakings 5 minutes down, obtains three layers of organic colloid, Graphene and the tinsels combination A of stack successively on graphene film;
Step 23. impregnated in the combination A that step (22) obtains in the tinsel etchant solution, removes tinsel, obtains the two-layer combination B of stack successively of organic colloid and Graphene;
Step 24. is salvaged the combination B that step (23) obtains with substrate, puts into deionized water, cleans twice, is placed on the substrate and dries by the fire 5 minutes down in 80～180 ℃, obtains organic colloid, Graphene and three layers of combination C that superposes successively of substrate;
The combination C that step 25. obtains step (24) puts into one or more mixed liquors of acetone, ethanol, isopropyl alcohol, all removes until organic colloid, takes out, and air dry obtains being positioned at on-chip graphene film.
Above-mentioned steps 24 has been represented transparent plastic substrates 1 or dielectric layer 4 with the substrate in the step 25.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help reader understanding's principle of the present invention, should to be understood that protection scope of the present invention is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not break away from essence of the present invention according to these teachings disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (1)
1. the manufacturing approach of Graphene electro-luminescence display device comprises step:
Step 1. cleans up transparent plastic substrates;
Step 2. forms graphene film and constitutes lower plate electrode on transparent plastic substrates;
Step 3. forms luminescent layer on the graphene film of lower plate electrode;
Step 4. forms dielectric layer on luminescent layer;
Step 5. forms the upper flat plate electrode that graphene film constitutes on dielectric layer;
Above-mentioned steps 2 is that the Graphene that chemical vapour deposition technique obtains is formed on this plastic substrate or the dielectric layer through the method that shifts with the method that step 5 forms graphene film; Its detailed process comprises:
Step 21. places tinsel in the chemical gas-phase deposition system cavity; Feed the hydrogen of 1～1000Pa, be heated to 700～1000 ℃ and be incubated 20 minutes, and then feed the hydrocarbon gas of 0.1～1000Pa; Be incubated 10～60 minutes again; Speed with 5～80 ℃/minute is reduced to room temperature, closes hydrogen and hydrocarbon gas, on tinsel, obtains graphene film;
Step 22. through spin coating, spraying, curtain coating or directly drip and form organic colloid, in 80～180 ℃ of bakings 5 minutes down, obtains three layers of organic colloid, Graphene and the tinsels combination A of stack successively on graphene film;
Step 23. impregnated in the combination A that step (22) obtains in the tinsel etchant solution, removes tinsel, obtains the two-layer combination B of stack successively of organic colloid and Graphene;
Step 24. is salvaged the combination B that step (23) obtains with substrate, puts into deionized water, cleans twice, is placed on the substrate and dries by the fire 5 minutes down in 80～180 ℃, obtains organic colloid, Graphene and three layers of combination C that superposes successively of substrate;
The combination C that step 25. obtains step (24) puts into one or more mixed liquors of acetone, ethanol, isopropyl alcohol, all removes until organic colloid, takes out, and air dry obtains being positioned at on-chip graphene film.
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| EP2862420B1 (en) * | 2012-06-19 | 2018-02-21 | Koninklijke Philips N.V. | Organic electroluminescent device |
| CN103035666A (en) * | 2012-12-28 | 2013-04-10 | 江苏宇迪光学股份有限公司 | Panel of large-sized flexible flat-panel display and manufacture method thereof |
| WO2015058571A1 (en) * | 2013-10-25 | 2015-04-30 | 京东方科技集团股份有限公司 | Oled display device and manufacturing method thereof |
| CN105869574B (en) | 2016-06-07 | 2017-03-29 | 京东方科技集团股份有限公司 | A kind of pixel-driving circuit and its driving method, array base palte and display device |
| CN106304515B (en) * | 2016-08-09 | 2019-02-15 | 重庆亮高科技有限公司 | Graphene face light source |
| CN116575259A (en) * | 2023-02-20 | 2023-08-11 | 嘉兴学院 | Preparation method of magnetic graphene cellulose composite material and flexible light-emitting device |
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| CN101760724A (en) * | 2010-01-26 | 2010-06-30 | 电子科技大学 | Method for preparing graphene membrane electrode with overlarge area and high quality |
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