CN110444632A

CN110444632A - A method of using electrode before graphene conductive film preparation flexible solar cell

Info

Publication number: CN110444632A
Application number: CN201910609374.6A
Authority: CN
Inventors: 胡绍莱; 陈培专; 李仁龙; 魏昌华; 高翔
Original assignee: Mianyang Jinneng Mobile Energy Co Ltd
Current assignee: Mianyang Jinneng Mobile Energy Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2019-11-12

Abstract

The invention discloses a kind of methods of electrode before film preparation flexible solar cell using graphene conductive, comprising: step 1: it is stand-by to choose a PEN film substrate；Step 2: cleaning PEN film substrate, dry using infrared drying oven；Step 3: a grapheme conductive film is chosen；Step 4: grapheme conductive film being immersed in two ammonium sulfates and is sufficiently reacted, stand-by graphene film after being separated；Step 5: PEN film substrate is inserted into separation vessel, PEN base graphene composite conductive film is made；Step 6: using PEN base graphene composite conductive film, carry out overlapping placement with flexible solar cell chip respectively, electrode mould group before flexible solar cell is made；Step 7: electrode mould group before flexible solar cell is subjected to preheating pressing and is determined；Step 8: dressing up type for electrode mould splits before the flexible solar cell in step 7, electrode before flexible solar cell is made；Using method of the invention, light transmittance, tensile strength and the conductive capability of electrode before substantially increasing.

Description

A method of using electrode before graphene conductive film preparation flexible solar cell

Technical field

The present invention relates to a kind of methods for preparing electrode before flexible solar cell.It is more particularly related to a kind of Using the method for electrode before graphene conductive film preparation flexible solar cell.

Background technique

Currently, flexible solar cell production technology is also not a large amount of universal at home, link is manufactured in front electrodes of solar cells What is generallyd use is silver, copper or yellow gold.

Firstly, silver or copper exist as the diameter of main gate line or secondary grid line using silk-screen printing technique as mainstream manufacturing technology 0.2-2mm.The fiber-loss mode common for solar cell as shown in Fig. 1.Specifically, when sunlight enters from battery front side Battery, positive metal electrode can block a part of solar cell light-receiving surface.Just can not according to luminous energy on the electrode this part yet Arrival light-receiving surface is to be transformed into electric energy, from the angle for the effective area of shining light for increasing solar cell, so it is desirable that Grid line is done more thinner better, but since the invention belongs to flexible solar cell or mobile energy battery products, to grid line Requirement of mechanical strength is higher, and the function of grid line is to conduct electric current, and from the angle analysis of resistivity, grid line gets over detailed rules and regulations Conductive cross-sectional area is smaller, and ohmic loss is bigger, therefore main grid and the core of secondary grid design are obtained between shading and conduction Balance, secondly, silver is with high costs, oxidizable, mechanical strength is limited in small scale structures and flexible foldable application.

Polyethylene naphthalate (PEN) is one of important member in polyester family, is by 2,6-naphthalenedicarboxylic acid diformazan Ester (NDC) or 2,6-naphthalenedicarboxylic acid (NDA) are formed with ethylene glycol (EG) polycondensation, are a kind of emerging smart polymerics.Its chemistry Structure is similar to PET, the difference is that in strand PEN by the bigger naphthalene nucleus of rigidity instead of the phenyl ring in PET, have The performances such as higher physical mechanical property, gas barrier property, chemical stability and heat-resisting, UV resistant, radiation hardness, simultaneously also With excellent mechanical property, Young's modulus and tensile modulus of elasticity ratio PET are higher by 50%, at high temperature under high pressure, elasticity Modulus, intensity, creep and service life are still able to maintain comparable stability.

Graphene (Graphene) be one kind by carbon atom with sp²Hybridized orbit forms the two dimension that hexangle type is in honeycomb lattice Carbon nanomaterial.Graphene has excellent optics, electricity, mechanical characteristic, in materialogy, micro-nano technology, the energy, biomedicine It is with important application prospects with drug delivery etc., it is considered to be a kind of future revolutionary material.Graphene is common The method of power production is mechanical stripping method, oxidation-reduction method, SiC epitaxial growth method, and film production method is chemical vapor deposition Area method (CVD).

It is just particularly important in consideration of it, finding a kind of new function material and going to substitute existing traditional electrode material.

Summary of the invention

It is excellent it is an object of the invention to solve at least the above problems and/or defect, and provide at least to will be described later Point.

In order to realize these purposes and other advantages according to the present invention, provide a kind of using graphene conductive film preparation The method of electrode before flexible solar cell, comprising:

Step 1: it chooses a length and is 300mm, width 60mm, waits for a thickness of the PEN film substrate of 0.3-0.6mm With；

Step 2: the PEN film substrate in step 1 is carried out using a certain concentration and the acetone cleaning solution of volume It cleans for the first time, secondary cleaning is then carried out to the PEN film substrate using dehydrated alcohol, finally again using deionized water to institute PEN film substrate is stated to clean three times, it is dry using infrared drying oven after the completion of cleaning, it saves stand-by；

Step 3: a film thickness is chosen at 0.085-0.75 μm and using copper foil as the grapheme conductive film of substrate, and is sealed Storage is stand-by；

Step 4: two ammonium sulfates of a certain concentration and volume are housed in separation vessel, described in step 3 Grapheme conductive film, which is immersed in two ammonium sulfate, sufficiently reacts, so that the grapheme conductive film and copper foil substrate point From stand-by graphene film after being separated；

Step 5: cleaning will be completed in step 2, dry PEN film substrate is inserted into step 4 with 60-75 ° of angle In the separation vessel in, be attached at graphene film stand-by in step 4 completely in the PEN film substrate be made PEN base graphene composite conductive film, then manually by the PEN base graphene composite conductive film from separation vessel in take out after, Re-dry is stand-by；

Step 6: using PEN base graphene composite conductive film obtained in two step 5, respectively from upper and lower both direction Upper and flexible solar cell chip carries out overlapping placement, electrode mould group before flexible solar cell is made；

Step 7: electrode mould group before flexible solar cell obtained in step 6 is carried out using the electric iron of certain temperature It is fixed to preheat pressing；

Step 8: electrode mould group uses hot-rolling pressure again before completing the fixed flexible solar cell of preheating pressing in step 7 Mode dispenses molding, electrode before flexible solar cell is made；

Wherein, all operating process of step 1~step 8 must cleanliness be in 100,000 grades and environment below into Row.

Preferably, wherein the substance withdrawl syndrome of acetone cleaning solution described in step 2 is 0.03mol/L, and volume is 5L, the temperature of infrared drying are arranged to 35-105 DEG C, and are stored in dry nitrogen cabinet.

Preferably, wherein the substance withdrawl syndrome of two ammonium sulfates is arranged to 0.025- in the step 4 0.25mol/L, volume are arranged to 500-800ml.

Preferably, wherein separation vessel described in step 4 is placed in ultrasonic oscillator, and standing time is 4- 5 hours.

Preferably, wherein two PEN base graphene composite conductive films and flexible solar cell chip in the step 6 Overlap the concrete mode placed are as follows: choose wherein one of two PEN base graphene composite conductive films, with graphene film it is upper, Mode of the PEN film substrate under is placed on the vacuum adsorption plate that length and width are 350cm*350cm, then again by the flexible sun Battery chip is attached on above-mentioned PEN base graphene composite conductive film with cathode in upper, the positive mode under, finally will in addition One PEN base graphene composite conductive film with graphene layer under, PEN film substrate in upper mode be attached to the flexibility On solar cell chip.

Preferably, wherein the fixed temperature of preheating pressing in the step 7 is arranged to 50-350 DEG C.

Preferably, wherein the concrete mode of the hot-rolling pressure are as follows: in extruder, utilize two Electromechanic heating rollers point It is not pressed on the surface of upper and lower two PEN base graphene composite conductive film, from one end of PEN base graphene composite conductive film It is back and forth compressed to the other end, until the PEN base graphene composite conductive film and the flexible solar cell chip roll-forming, The roll body surface temperature Wen Cha≤± 1 DEG C of the Electromechanic heating roller, Re Bian Xing≤0.01mm, straightness, bounce, Tong Zhou Du≤ 0.005mm, Electromechanic heating roller operating temperature are arranged to 50-350 DEG C.

Preferably, wherein the cleaning process three times in step 2 is completed under the action of ultrasonic wave.

The present invention is include at least the following beneficial effects:

One, high light transmittance: graphene layer thicknesses of layers is at 0.1-10 μm or so, using can not use grid after graphene Line, while 2.3% excellent properties are only absorbed using graphene in terms of light absorption, solar cell can be greatly increased to light Absorption, to increase the power output of unit area, transmitance be the luminous flux through object and be irradiated to object light it is logical The ratio between amount, i.e.,

Its light transmittance can be calculated 98.5% according to parameters such as the scantlings of this formula and PEN base graphene film Left and right, light transmittance greatly improve.

Secondly, mechanical characteristic: the theoretical Young's modulus of graphene reach 1.0TPa, intrinsic tensile strength be 130GPa.Machine Tool intensity is high, makes its Flexible Production preferably and application in flexible copper indium gallium selenide solar cell or mobile energy products. The present invention is cleaned by chemical agent using using PEN film as substrate, infra-red drying is recycled after corona treatment, Finally by graphene layer " grafting " on PEN film, makes and have excellent mechanical properties and there is superpower electron transfer to pass The composite film material of Movement Capabilities.

Thirdly, high conductivity: the carrier mobility of graphene at room temperature is about 15000cm2/ (Vs), this number Value has been more than 10 times of silicon materials.Its maximum characteristic is that the movement velocity of wherein electronics has reached the 1/300 of the light velocity, much super Movement velocity of the electronics in general conductor has been crossed, this characteristic of graphene is taken full advantage of in the present invention, makes the flexible sun The electronics that battery chip generates under light illumination is quickly and effectively collected by graphene film layer, and is converged eventually by cathode It flows item and draws generation electric current.

Four, the mechanical property of PEN film, chemical stability, heat resistance, barrier property, ultraviolet radiation absorption are utilized The advantages that ability, " light " " soft " feature perfect combination with flexible solar cell product.

Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this The research and practice of invention and be understood by the person skilled in the art.

Detailed description of the invention

Fig. 1 shows the structure chart of PEN film substrate；

Fig. 2 shows the structure charts of black alkene conductive film；

Fig. 3 shows grapheme conductive film and is separating the structure chart in ware with two ammonium sulfates；

Fig. 4 shows the structure chart of graphene film；

Fig. 5 shows the structure chart that PEN film substrate is inserted into separation vessel；

Fig. 6 shows the structure chart that PEN base graphene composite conductive film takes out from separation vessel；

Fig. 7 shows the structure chart after the drying of PEN base graphene composite conductive film；

Fig. 8 shows the structure chart of electrode mould group before flexible solar cell；

Fig. 9 shows the structure chart of electrode mould group hot-rolling pressure encapsulated moulding before flexible solar cell；

Figure 10 shows the structure chart of electrode before obtained flexible solar cell.

Specific embodiment

Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text Word can be implemented accordingly.

It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more The presence or addition of a other elements or combinations thereof.

Embodiment 1:

A kind of way of realization of the method for electrode before a kind of film preparation flexible solar cell using graphene conductive, including with Lower step:

Step 1: choose a length be 300mm, width 60mm, with a thickness of 0.3-0.6mm PEN film substrate (such as Shown in Fig. 1) it is stand-by；The PEN film substrate of use has 1, good chemical stability, and PEN is to organic solution and chemicals Stablize, the ability of acid and alkali-resistance is better than PET；2, good heat resistance makes PEN since naphthalene nucleus improves the aromaticity of macromolecular Excellent hot property is had more than PET, after PEN is placed 500 hours in 130 degree of humid air, elongation only declines 10%, After placing 10 hours in 180 degree dry air, elongation is still able to maintain 50%；3, good resistance to ultraviolet radiation energy, by There is very strong uv absorption capacity in the twin nuclei of naphthalene, so that PEN can obstruct the ultraviolet light less than 380nm, barrier Effect is obviously superior to PC；4 and good mechanical property, the Young's modulus and tensile modulus of elasticity of PEN be higher by than PET 50%.Moreover, the stable mechanical property of PEN, even if elasticity modulus, intensity, creep and service life are still in high temperature and pressure It is able to maintain comparable stability, therefore in the present invention using PEN film substrate as the base for preparing electrode before flexible solar cell Material makes before flexible solar battery obtained electrode have excellent chemical stability, resistance to just because of it with above-mentioned advantage The various advantages such as hot, UV radiation function and good mechanical property.

Step 2: the PEN film substrate in step 1 is carried out using a certain concentration and the acetone cleaning solution of volume It cleans for the first time, secondary cleaning is then carried out to the PEN film substrate using dehydrated alcohol, finally again using deionized water to institute PEN film substrate is stated to clean three times, it is dry using infrared drying oven after the completion of cleaning, it saves stand-by；Using acetone soln master It is mainly pair using dehydrated alcohol if handling metal ion, the oxidative ionic isoreactivity ion on PEN film substrate PEN film substrate continues purifying, absorbs moisture drying, mainly continues with residual to PEN film substrate using deionized water Metal ion, oxidative ionic etc., keep the active ion on PEN film substrate surface all processed, avoid subsequent related behaviour It pollutes, the cleaning process three times of PEN film substrate is completed under the action of ultrasonic wave, and cleaning process is in three times The purpose of ultrasonic wave effect is that ultrasonic wave can generate slight vibration, to make the nanometer being attached on PEN film substrate Grade, micron particles impurity are more easy to fall off, make cleaning effect more preferably, more thoroughly.

The substance withdrawl syndrome of the acetone cleaning solution is 0.03mol/L, and the temperature of volume 5L, infrared drying are set It is set to 35-105 DEG C, and is stored in dry nitrogen cabinet.Within the above range by the setting of the concentration of acetone soln, for Metal ion, oxidative ionic on PEN film substrate etc. have best removing treatment effect.The drying temperature of infrared ray is arranged Within this range, first is that guaranteeing that there is preferable drying effect to PEN film substrate, while excessively high temperature also being avoided to burn out PEN film substrate.PEN film substrate is stored in inert gas (nitrogen), mainly protective film layer avoids being oxidized, and makes Its performance is more stable.

Step 3: a film thickness is chosen at 0.085-0.75 μm and using copper foil as grapheme conductive film (such as Fig. 2 of substrate It is shown), and sealed storage is stand-by；Grapheme conductive film has the advantage that (1) in graphene-structured, and there are four carbon atoms Valence electron, carbon atom each in this way contribute the pi-electron of a non-bonding, these pi-electrons direction vertical with plane can be formed Track, pi-electron can move freely in crystal, this is the advantage place that graphene has satisfactory electrical conductivity.Research shows that electronics Conduction velocity in graphene is 1/300 (106m/s) of the light velocity, resistivity 10^-8Ω m is also lower than copper/silver resistivity (2) it is one of highest material of known strength that graphene, which has good conductive optical performance (3) graphene, while also being had very Good toughness, and can be bent, the theoretical Young's modulus of graphene reaches 1.0TPa, and intrinsic tensile strength is 130GPa.

Step 4: two ammonium sulfates of a certain concentration and volume are housed in separation vessel, described in step 3 Grapheme conductive film is immersed in two ammonium sulfate sufficiently reaction (as shown in Figure 3), so that the grapheme conductive film It is separated with copper foil substrate, stand-by graphene film (as shown in Figure 4) after being separated, the amount of the substance of two ammonium sulfates is dense Degree is arranged to 0.025-0.25mol/L, and volume is arranged to 500-800ml.By the substance withdrawl syndrome of two ammonium sulfates And volume setting is within the above range, main purpose imitates the corrosion that copper foil base material has efficiency highest, effect best for it Fruit；Ammonium persulfate, also referred to as ammonium peroxydisulfate are a kind of ammonium salts, and two ammonium sulfate of chemical formula, molecular weight 228.201 will be described point It is placed in ultrasonic oscillator from vessel, standing time is 4-5 hour, and main purpose is to make to separate vessel generation slightly Vibration accelerates grapheme conductive film and the separating rate of copper foil base material, efficiency raising.

Research shows that ammonium persulfate is widely used in the Storage Battery Industry in China as oxidant and bleaching agent；It also serves as poly- The desizing agent of the initiator of conjunction, fiber industry；And it can be used as the etching of metal and semiconductor material surface inorganic agent, printed wire Agent；Mainly corrode copper foil substrate using two ammonium sulfate, after keeping grapheme conductive film separated, obtains purer graphene Film.

Step 5: cleaning will be completed in step 2, dry PEN film substrate is inserted into step 4 with 60 ° of angle The separation vessel in (as shown in Figure 5), so that graphene film stand-by in step 4 is attached at the PEN film substrate completely In be made PEN base graphene composite conductive film, then manually by the PEN base graphene composite conductive film from separation vessel in (as shown in Figure 6), re-dry are stand-by (as shown in Figure 7) after taking-up；After related technical personnel repeat a large amount of experiment, obtain When PEN film substrate being inserted into 60 ° of angle out, the attaching effect degree of graphene film and PEN film substrate is 96.8%.

Step 6: using PEN base graphene composite conductive film obtained in two step 5, respectively from upper and lower both direction Upper and flexible solar cell chip carries out overlapping placement, electrode mould group (as shown in Figure 8) before flexible solar cell is made；By two PEN base graphene composite conductive film and flexible solar cell chip be stacked together just constitute flexible solar before electrode The concrete mode that basic structure, two PEN base graphene composite conductive film and flexible solar cell chip overlapping are placed are as follows: Wherein one for choosing two PEN base graphene composite conductive films, with graphene film in mode upper, that PEN film substrate is under, Be placed in length and width be 350cm*350cm vacuum adsorption plate on, then again by flexible solar cell chip with cathode upper, positive Mode under is attached on above-mentioned PEN base graphene composite conductive film, finally by other PEN base graphene composite conductive Film with graphene layer under, PEN film substrate is attached on the flexible solar cell chip in upper mode.Due to PEN base Graphene composite conductive film is very soft, is not fixed easily, therefore makes the structure of PEN base graphene composite conductive film by vacuum suction Stability is stronger, will not destroy, and PEN base graphene composite conductive film is overlapped in a manner described with flexible solar cell chip and is put It sets, electrode can work normally before mainly guaranteeing manufactured flexible solar battery.

Step 7: electrode mould group before flexible solar cell obtained in step 6 is carried out using the electric iron of certain temperature It is fixed to preheat pressing；2 points on relative position before selection flexible solar cell in electrode mould group, are added by electric iron to it It is hot preliminary fixed, sliding and offset that position occurs are avoided, the fixed temperature of the preheating pressing in the step 7 is arranged to 50- 350℃.Pressing being preheated, fixed temperature is set within the above range, first is that can be to electrode mould before flexible solar cell Group plays the effect of preliminary hot pressing, second is that excessively high temperature is avoided to burn out electrode mould group before flexible solar cell.

Step 8: electrode mould group uses hot-rolling pressure again before completing the fixed flexible solar cell of preheating pressing in step 7 Mode encapsulated moulding (as shown in Figure 9), electrode (as shown in Figure 10) before flexible solar cell is made；It is exactly using hot-rolling pressure To before flexible solar cell in electrode mould group PEN base graphene composite conductive film and flexible solar cell chip carry out it is complete And thoroughly pressing, keep the structural stability of electrode before flexible solar cell more preferable, contact presses even closer, the hot-rolling pressure Concrete mode are as follows: in extruder, using two Electromechanic heating rollers be pressed on respectively up and down two PEN base graphene composite guides On the surface of electrolemma, back and forth compressed from one end of PEN base graphene composite conductive film to the other end, until the PEN base graphite Alkene composite conductive film and the flexible solar cell chip roll-forming, the roll body surface temperature Wen Cha of the Electromechanic heating roller≤ ± 1 DEG C, Re Bian Xing≤0.01mm, straightness, bounce, Tong Zhou Du≤0.005mm, Electromechanic heating roller operating temperature are arranged to 50-350℃.The roll body surface temperature temperature difference setting of Electromechanic heating roller within the above range, mainly improves electromagnetic heating roller temperature Spend homogeneity, make its to PEN base graphene composite conductive film press when heating temperature it is more uniform, by straightness, bounce, coaxially Degree setting within the above range, mainly guarantees that stress is more when Electromechanic heating roller presses PEN base graphene composite conductive film Uniformly, cavity, bubble, fold or male and fomale(M&F) are avoided the occurrence of.

Wherein, all operating process of step 1~step 8 must cleanliness be in 100,000 grades and environment below into Row.The cleanliness of all operations step is arranged in this unit, small impurity, dust and particle etc. is avoided to be attached to graphene film On PEN film substrate, so it is contaminated, decline conductive effect and ability.

Embodiment 2:

Step 5: cleaning will be completed in step 2, dry PEN film substrate is inserted into step 4 with 63 ° of angle The separation vessel in (as shown in Figure 5), so that graphene film stand-by in step 4 is attached at the PEN film substrate completely In be made PEN base graphene composite conductive film, then manually by the PEN base graphene composite conductive film from separation vessel in (as shown in Figure 6), re-dry are stand-by (as shown in Figure 7) after taking-up；After related technical personnel repeat a large amount of experiment, obtain When PEN film substrate being inserted into 60 ° of angle out, the attaching effect degree of graphene film and PEN film substrate is 97.3%.

Step 7: electrode mould group before flexible solar cell obtained in step 6 is carried out using the electric iron of certain temperature It is fixed to preheat pressing；2 points on relative position before selection flexible solar cell in electrode mould group, are added by electric iron to it Hot preliminary fixed, avoiding the preheating pressing in sliding and offset, the step 7 that position occurs, fixed temperature is set It is 50-350 DEG C.Pressing being preheated, fixed temperature is set within the above range, first is that before can be to flexible solar cell Electrode mould group plays the effect of preliminary hot pressing, second is that excessively high temperature is avoided to burn out electrode mould group before flexible solar cell.

Step 8: electrode mould group uses hot-rolling pressure again before completing the fixed flexible solar cell of preheating pressing in step 7 Mode dispenses molding (as shown in Figure 9), electrode (as shown in Figure 10) before flexible solar cell is made；It is exactly using hot-rolling pressure To before flexible solar cell in electrode mould group PEN base graphene composite conductive film and flexible solar cell chip carry out it is complete And thoroughly pressing, keep the structural stability of electrode before flexible solar cell more preferable, contact presses even closer, the hot-rolling pressure Concrete mode are as follows: in extruder, using two Electromechanic heating rollers be pressed on respectively up and down two PEN base graphene composite guides On the surface of electrolemma, back and forth compressed from one end of PEN base graphene composite conductive film to the other end, until the PEN base graphite Alkene composite conductive film and the flexible solar cell chip roll-forming, the roll body surface temperature Wen Cha of the Electromechanic heating roller≤ ± 1 DEG C, Re Bian Xing≤0.01mm, straightness, bounce, Tong Zhou Du≤0.005mm, Electromechanic heating roller operating temperature are arranged to 50-350℃.The roll body surface temperature temperature difference setting of Electromechanic heating roller within the above range, mainly improves electromagnetic heating roller temperature Spend homogeneity, make its to PEN base graphene composite conductive film press when heating temperature it is more uniform, by straightness, bounce, coaxially Degree setting within the above range, mainly guarantees that stress is more when Electromechanic heating roller presses PEN base graphene composite conductive film Uniformly, cavity, bubble, fold or male and fomale(M&F) are avoided the occurrence of.

Embodiment 3:

Step 5: cleaning will be completed in step 2, dry PEN film substrate is inserted into step 4 with 66 ° of angle The separation vessel in (as shown in Figure 5), so that graphene film stand-by in step 4 is attached at the PEN film substrate completely In be made PEN base graphene composite conductive film, then manually by the PEN base graphene composite conductive film from separation vessel in (as shown in Figure 6), re-dry are stand-by (as shown in Figure 7) after taking-up；After related technical personnel repeat a large amount of experiment, obtain When PEN film substrate being inserted into 60 ° of angle out, the attaching effect degree of graphene film and PEN film substrate is 98.4%.

Embodiment 4:

Step 5: cleaning will be completed in step 2, dry PEN film substrate is inserted into step 4 with 69 ° of angle The separation vessel in (as shown in Figure 5), so that graphene film stand-by in step 4 is attached at the PEN film substrate completely In be made PEN base graphene composite conductive film, then manually by the PEN base graphene composite conductive film from separation vessel in (as shown in Figure 6), re-dry are stand-by (as shown in Figure 7) after taking-up；After related technical personnel repeat a large amount of experiment, obtain When PEN film substrate being inserted into 60 ° of angle out, the attaching effect degree of graphene film and PEN film substrate is 99.5%.

Embodiment 5:

Step 5: cleaning will be completed in step 2, dry PEN film substrate is inserted into step 4 with 72 ° of angle The separation vessel in (as shown in Figure 5), so that graphene film stand-by in step 4 is attached at the PEN film substrate completely In be made PEN base graphene composite conductive film, then manually by the PEN base graphene composite conductive film from separation vessel in (as shown in Figure 6), re-dry are stand-by (as shown in Figure 7) after taking-up；After related technical personnel repeat a large amount of experiment, obtain When PEN film substrate being inserted into 60 ° of angle out, the attaching effect degree of graphene film and PEN film substrate is 98.1%.

Embodiment 6:

Step 5: cleaning will be completed in step 2, dry PEN film substrate is inserted into step 4 with 75 ° of angle The separation vessel in (as shown in Figure 5), so that graphene film stand-by in step 4 is attached at the PEN film substrate completely In be made PEN base graphene composite conductive film, then manually by the PEN base graphene composite conductive film from separation vessel in (as shown in Figure 6), re-dry are stand-by (as shown in Figure 7) after taking-up；After related technical personnel repeat a large amount of experiment, obtain When PEN film substrate being inserted into 60 ° of angle out, the attaching effect degree of graphene film and PEN film substrate is 97.6%.

Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed With.It can be applied to various suitable the field of the invention completely.It for those skilled in the art, can be easily Realize other modification.Therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited In specific details and legend shown and described herein.

Fig. 1 shows the structure chart of PEN film substrate；

Fig. 2 shows the structure charts of black alkene conductive film；

Fig. 4 shows the structure chart of graphene film；

Claims

1. a kind of method of electrode before film preparation flexible solar cell using graphene conductive characterized by comprising

Step 1: choose a length be 300mm, it is width 60mm, stand-by with a thickness of the PEN film substrate of 0.3-0.6mm；

Step 2: the PEN film substrate in step 1 is carried out for the first time using a certain concentration and the acetone cleaning solution of volume Then cleaning carries out second to the PEN film substrate using dehydrated alcohol and cleans, finally again using deionized water to described PEN film substrate third time is cleaned, dry using infrared drying oven after the completion of cleaning, is saved stand-by；

Step 3: a film thickness is chosen at 0.085-0.75 μm and using copper foil as the grapheme conductive film of substrate, and sealed storage For use；

Step 4: two ammonium sulfates of a certain concentration and volume are housed in separation vessel, by the graphite in step 3 Alkene conductive film, which is immersed in two ammonium sulfate, sufficiently to react, so that the grapheme conductive film is separated with copper foil substrate, Stand-by graphene film after being separated；

Step 5: cleaning will be completed in step 2, dry PEN film substrate is inserted into step 4 with 60-75 ° of angle In the separation vessel, it is attached at graphene film stand-by in step 4 completely in the PEN film substrate so that PEN base is made Graphene composite conductive film, then manually by the PEN base graphene composite conductive film after being taken out in separation vessel, re-dry For use；

Step 6: using PEN base graphene composite conductive film obtained in two step 5, respectively from upper and lower both direction with Flexible solar cell chip carries out overlapping placement, electrode mould group before flexible solar cell is made；

Step 7: electrode mould group before flexible solar cell obtained in step 6 is preheated using the electric iron of certain temperature Pressing is fixed；

Step 8: electrode mould group will be completed before the fixed flexible solar cell of preheating pressing in step 7 again by the way of hot-rolling pressure Packing molding, electrode before flexible solar cell is made；

Wherein, all operating process of step 1~step 8 must be to carry out in 100,000 grades and environment below in cleanliness.

2. the method for electrode before a kind of film preparation flexible solar cell using graphene conductive according to claim 1, It is characterized in that, the substance withdrawl syndrome of acetone cleaning solution described in step 2 is 0.03mol/L, volume 5L, infrared drying Temperature be arranged to 35-105 DEG C, and be stored in dry nitrogen cabinet.

3. the method for electrode before a kind of film preparation flexible solar cell using graphene conductive according to claim 1, It is characterized in that, the substance withdrawl syndrome of two ammonium sulfates is arranged to 0.025-0.25mol/L, volume quilt in the step 4 It is set as 500-800ml.

4. the method for electrode before a kind of film preparation flexible solar cell using graphene conductive according to claim 1, It is characterized in that, separation vessel described in step 4 is placed in ultrasonic oscillator, and standing time is 4-5 hour.

5. the method for electrode before a kind of film preparation flexible solar cell using graphene conductive according to claim 1, It is characterized in that, the tool that two PEN base graphene composite conductive films and flexible solar cell chip overlapping are placed in the step 6 Body mode are as follows: wherein one for choosing two PEN base graphene composite conductive films is existed with graphene film in upper, PEN film substrate Under mode, be placed in length and width be 350cm*350cm vacuum adsorption plate on, then again by flexible solar cell chip with cathode It is attached on above-mentioned PEN base graphene composite conductive film in upper, the positive mode under, finally by other PEN base graphite Alkene composite conductive film with graphene layer under, PEN film substrate is attached on the flexible solar cell chip in upper mode.

6. the method for electrode before a kind of film preparation flexible solar cell using graphene conductive according to claim 1, It is characterized in that, the fixed temperature of the preheating pressing in the step 7 is arranged to 50-350 DEG C.

7. the method for electrode before a kind of film preparation flexible solar cell using graphene conductive according to claim 1, It is characterized in that, the concrete mode of the hot-rolling pressure are as follows: in extruder, be pressed on upper and lower two respectively using two Electromechanic heating rollers On the surface for opening PEN base graphene composite conductive film, back and forth pressed from one end of PEN base graphene composite conductive film to the other end Tightly, until the PEN base graphene composite conductive film and the flexible solar cell chip roll-forming, the Electromechanic heating roller Roll body surface temperature Wen Cha≤± 1 DEG C, Re Bian Xing≤0.01mm, straightness, bounce, Tong Zhou Du≤0.005mm, electromagnetic heating Roller operating temperature is arranged to 50-350 DEG C.

8. the method for electrode before a kind of film preparation flexible solar cell using graphene conductive according to claim 1, It is characterized in that, the cleaning process three times in step 2 is completed under the action of ultrasonic wave.