CN106098139B - Electrode constituent, electrode and solar cell using its manufacture - Google Patents

Electrode constituent, electrode and solar cell using its manufacture Download PDF

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Publication number
CN106098139B
CN106098139B CN201610197376.5A CN201610197376A CN106098139B CN 106098139 B CN106098139 B CN 106098139B CN 201610197376 A CN201610197376 A CN 201610197376A CN 106098139 B CN106098139 B CN 106098139B
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methyl
electrode
weight
acrylate
electrode constituent
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CN106098139A (en
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金东奭
金周熙
朴永起
申东�
申东一
郑锡铉
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Changzhou Fusion New Material Co Ltd
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Samsung SDI Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/14—Conductive material dispersed in non-conductive inorganic material
    • H01B1/16—Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/06—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by potential barriers
    • H01L31/068—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by potential barriers the potential barriers being only of the PN homojunction type, e.g. bulk silicon PN homojunction solar cells or thin film polycrystalline silicon PN homojunction solar cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/547—Monocrystalline silicon PV cells

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Sustainable Energy (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Conductive Materials (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Photovoltaic Devices (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention provides a kind of electrode constituent, electrode and solar cell using its manufacture, and wherein electrode constituent includes：Conductive powder；Frit；And include the organic vehicle of organic bond, multifunctional (methyl) acrylate compounds and solvent, the molecular weight of wherein described multifunctional (methyl) acrylate compounds is 200 to 500, and is the amount presence with 0.15 weight % to 2 weight % in terms of its 100 weight % by the electrode constituent.The electrode constituent of the present invention has fabulous continuous impressionability and can increase the adhesion strength of substrate and electrode pattern and improve the efficiency of solar cell.

Description

Electrode constituent, electrode and solar cell using its manufacture
Technical field
Embodiment is related to a kind of electrode constituent, a kind of electrode using its manufacture and a kind of solar cell.
Background technology
Solar cell is produced electricl energy using by the converting photons of daylight into the photovoltaic effect of the p-n junction of electricity. In solar cell, preceding electrode and back electrode be respectively formed in the semiconductor wafer with p-n junction or substrate front surface and after On surface.Then, by enter semiconductor wafer day photo-induced p-n junction photovoltaic effect, and by the photoproduction of p-n junction The electronics that Volta effect generates provides electric current to outside via electrode.
The electrode of solar cell can be by being coated with, patterning and firing (firing) electrode constituent and to make a reservation for Pattern is formed on the surface of chip.It is improved in the following manner known to the transformation efficiency of solar cell：Modified electrode and lining The contact property at bottom, therefore minimize contact resistance (Rc) and series resistance (Rs)；Or with organic material by the pattern of screen mask Line width is adjusted to smaller, and therefore forms filament and increases short circuit current (Isc).However, reduce electrode figure with screen mask The method of the line width of case may result in series resistance (Rs) increase and the continuous impressionability of fine pattern is made to degenerate.
During the process for being manufactured into final module, the electrode pattern on substrate should be connected to each other via band and It is attached on substrate, but when electrode pattern is from substrate desquamation, in fact it could happen that electrical connection shortcoming, and reliability may be moved back Change.It is therefore desirable to be able to the impressionability of electrode pattern is ensured during the formation of electrode pattern and improves its adhesion strength Electrode constituent.
Invention content
One embodiment provides a kind of electrode constituent, with fabulous continuous impressionability and can increase substrate With the adhesion strength of electrode pattern, therefore improve solar cell efficiency and reliability.
Another embodiment provides a kind of electrode manufactured using the electrode constituent.
Another embodiment provides a kind of solar cell for including the electrode.
The present invention can implement other embodiments.
One embodiment provides a kind of electrode constituent, it includes：Conductive powder；Frit；Comprising organic bond, more The organic vehicle of function (methyl) acrylate compounds and solvent, wherein the multifunctional (methyl) acrylate compounds Molecular weight for 200 to 500, and in terms of 100 weight % of electrode constituent, the multifunctional (methyl) acrylate chemical combination Object is the amount presence with 0.15 weight % to 2 weight %.
Multifunctional (methyl) acrylate compounds can be by two (methyl) acrylate compounds, three (methyl) acrylic acid It is selected in ester compounds, four (methyl) acrylate compounds and its mixture.
Multifunctional (methyl) acrylate compounds can be by selecting in the following terms：Trimethylolpropane tris (methyl) third Olefin(e) acid ester (trimethylolpropane tri (meth) acrylate), (methyl) acrylate of ethylene glycol two (ethylene Glycoldi (meth) acrylate), triethylene glycol two (methyl) acrylate (triethylene glycol di (meth) Acrylate), butanediol two (methyl) acrylate (butanediol di (meth) acrylate), hexylene glycol two (methyl) Acrylate (hexanedioldi (meth) acrylate), (methyl) acrylate of pentaerythrite three (pentaerythritol Tri (meth) acrylate), trihydroxy methyl three (methyl) acrylate (trimethylol tri (meth) acrylate), season Penta tetrol four (methyl) acrylate (pentaerythritol tetra (meth) acrylate) and its mixture.
In terms of 100 weight % of electrode constituent, multifunctional (methyl) acrylate compounds can be with 0.15 weight % to 2 The amount of weight % exists.
The molecular weight of multifunctional (methyl) acrylate compounds can be 250 to 400.
After the multifunctional (methyl) acrylate compounds of electrode constituent can be heat-treated at 200 DEG C to 400 DEG C It remains in gained film.
Frit can be by selecting in bismuth class frit, lead class frit and its mixture.
Bismuth class frit can be bismuth (Bi)-tellurium (Te) frit.Bismuth (Bi)-tellurium (Te) frit can rub comprising 20 % to 80 moles of % tellurium oxide of that and 20 moles of % to 80 moles of % bismuth oxides.
Electrode constituent can include：60 weight % to 95 weight % conductive powders；0.5 weight % to 20 weight % glass Material；And 1 weight % to 30 weight % organic vehicles.
Electrode constituent can include at least one by what is selected in the following terms：Surface conditioning agent, dispersant, thixotroping Agent, plasticiser, viscosity stabiliser, antifoaming agent, pigment, ultraviolet (UV) stabilizer, antioxidant, coupling agent etc..
Another embodiment provides a kind of electrode manufactured using the electrode constituent.
Another embodiment provides a kind of solar cell for including the electrode.
The electrode constituent has fabulous continuous impressionability and can increase the adhesion of substrate and electrode pattern Power and the efficiency for improving solar cell.
Description of the drawings
Fig. 1 is the schematic diagram for the structure for showing the solar cell according to one embodiment.
Specific embodiment
The present invention will be described more fully hereinafter with reference to the accompanying drawings, illustrate the illustration of the present invention in the drawings Property embodiment.As skilled in the art will recognize, described embodiment can be changed in a variety of ways, All it is to carry out without departing from the spirit or scope of the present invention.
In the accompanying drawings, for clarity, the thickness in amplification layer, film, panel, region etc..Throughout the manual, identical figure Formula component symbol represents similar elements.It should be understood that it is known as when by an element, such as layer, film, region or substrate in another element " on " when, can be directly on another described element or there may also be insertion elements.In contrast, when element quilt Referred to as " directly exist " another element " on " when, there is no insertion elements.
One embodiment provides a kind of electrode constituent, it includes：Conductive powder；Frit；And organic vehicle, packet Containing organic bond, multifunctional (methyl) acrylate compounds and solvent.
Hereinafter, the present invention will be described in detail.
The electrode constituent includes metal powder as conductive powder.The metal powder can include silver-colored (Ag), gold (Au), palladium (Pd), platinum (Pt), ruthenium (Ru), rhodium (Rh), osmium (Os), iridium (Ir), rhenium (Re), titanium (Ti), niobium (Nb), tantalum (Ta), aluminium (Al), copper (Cu), nickel (Ni), molybdenum (Mo), vanadium (V), zinc (Zn), magnesium (Mg), yttrium (Y), cobalt (Co), zirconium (Zr), iron (Fe), tungsten (W), tin (Sn), chromium (Cr), manganese (Mn) etc..
The granularity of the conductive powder can be nanoscale or micron order.For example, the granularity of the conductive powder can To be tens to hundreds of nanometers or a few to tens of microns.In other embodiments, the conductive powder can have different grains Two kinds or the mixture more than two kinds of silver powder of degree.
The conductive powder can have spherical, slice-shaped or amorphous shape of particle.The conductive powder is averaged Particle diameter (D50) can be 0.1 micron to 10 microns, such as 0.5 micron to 5 microns.Mean particle diameter can be in room temperature Conductive powder is scattered in isopropanol (isopropyl alcohol via ultrasonication under (24 DEG C to 25 DEG C)；IPA 3 in) After minute, measured using such as model 1064D (western Laeis GmbH (CILAS Co., Ltd.s)) equipment.It is average at this In the range of particle diameter, the constituent can provide low contact resistance and low line resistance.
In terms of 100 weight % of electrode constituent, conductive powder can exist with the amount of 60 weight % to 95 weight %.Herein In the range of, it can prevent transformation efficiency from degenerating, and be also prevented from being reduced by the opposite of organic vehicle since resistance increases Caused hard paste is formed.In one embodiment, conductive powder can exist with the amount of 70 weight % to 90 weight %.
Frit can be to enhance the adhesion strength between conductive powder and chip or substrate, and by etching antireflection Layer and melting conductive powder form silver-colored crystal grain in emitter region, to reduce contact electricity during the sintering procedure of electrode paste Resistance.In addition, during sintering process, frit can be softened and can reduce firing temperature.
When increasing the area of solar cell to improve solar battery efficiency, there are the contact electricity of solar cell Resistance may increased possibility.Therefore, it is necessary to minimize the influence to p-n junction to minimize series resistance (Rs) simultaneously.In addition, it burns Temperature processed can be used with the increase of the various chips with different sheet resistances and be changed in broad range.Need frit Enough thermal stability are ensured to be resistant to broad range of firing temperature.
One of lead glass material and lead-less glasses material that frit can be typically used in electrode constituent are more than One.
Frit can be by selecting in bismuth class frit, lead class frit and its mixture.
Frit can further include at least one element by being selected in the following terms：Lead (Pb), tellurium (Te), bismuth (Bi), Lithium (Li), phosphorus (P), germanium (Ge), gallium (Ga), cerium (Ce), iron (Fe), silicon (Si), zinc (Zn), tungsten (W), magnesium (Mg), caesium (Cs), strontium (Sr), molybdenum (Mo), titanium (Ti), tin (Sn), indium (In), vanadium (V), barium (Ba), nickel (Ni), copper (Cu), sodium (Na), potassium (K), arsenic (As), cobalt (Co), zirconium (Zr), manganese (Mn) and aluminium (Al).
Bismuth class frit can be bismuth (Bi)-tellurium (Te) frit.
Bismuth (Bi)-tellurium (Te) frit can include 20 moles of % to 80 moles of % tellurium oxides and 20 moles of % rub to 80 That % bismuth oxides.When in the range use tellurium and bismuth when, can ensure simultaneously fabulous solar cell transformation efficiency and The adhesion strength of electrode pattern.
Frit can be prepared by any suitable method by the oxide of element.For example, the oxide of element It can obtain in the following manner：With the oxide of estimated rate complex element, mixture is melted, quenched gains Fire, and then crush quenched product.Mixing can use ball mill or planetary mill to carry out.Melting can be 700 DEG C to carrying out at 1300 DEG C, and quench and can be carried out under room temperature (24 DEG C to 25 DEG C).Crushing can use (but not limited to) Disc mill or planetary mill carry out.
The mean particle diameter (D50) of frit can be 0.1 micron to 10 microns, and with the 100 of electrode constituent Weight % is counted, and can be existed with the amount of 0.5 weight % to 20 weight %.Within this range, frit may insure electrode pattern Fabulous adhesion strength the electrical feature of electrode will not be made to degenerate simultaneously.
Frit can have spherical or amorphous.
In one embodiment, the two different kinds of frit with different transition temperatures can be used.Citing comes It says, transition temperature arrives the first frit being less than or equal in the range of 350 DEG C and transition temperature greater than or equal to 200 DEG C in height It can be with 1 in the second frit that 350 DEG C are arrived in the range of less than or equal to 550 DEG C:0.2 to 1:Weight ratio mixing in the range of 1.
Organic vehicle can assign suitable viscosity and rheological charactristics, for by with electrode constituent without unit Point mechanical mixture is printed onto on electrode constituent.Organic vehicle includes organic bond, multifunctional (methyl) acrylate Close object and solvent.
Organic bond can be by selecting in acrylic resin or cellulosic resin.For example, organic Agent can be by selecting in the following terms：Ethyl cellulose, ethylhydroxyethylcellulose, nitrocellulose, ethyl cellulose and phenol The mixture of resin (phenolic resin), alkyd resin, phenolic resin, acrylic resin, xylene resin, Polybutene resinoid, polyester resin, ureas resin, melamine resinoid, vinyl acetate esters resin, wood rosin or alcohol Polymethacrylates.
The weight average molecular weight (Mw) of organic bond can be 30,000 gram/mol to 200,000 grams/mol, example Such as 40,000 grams/mol to 150,000 grams/mol.When weight average molecular weight (Mw) is in the range, can obtain Fabulous effect in terms of impressionability.
Multifunctional (methyl) acrylate compounds have at least two acrylate groups or methacrylate group. In other words, simple function (methyl) acrylate compounds can exclude in the present invention.
Multifunctional (methyl) acrylate compounds can be it is following in it is one or more：Two (methyl) acrylate Compound, three (methyl) acrylate compounds or four (methyl) acrylate compounds.Multifunctional (methyl) acrylate Close object can be it is following in it is one or more：Trimethylolpropane tris (methyl) acrylate, ethylene glycol two (methyl) third Olefin(e) acid ester, triethylene glycol two (methyl) acrylate, butanediol two (methyl) acrylate, hexylene glycol two (methyl) acrylic acid Ester, pentaerythrite three (methyl) acrylate, (methyl) acrylate of trihydroxy methyl three or pentaerythrite four (methyl) acrylic acid Ester.
The molecular weight of multifunctional (methyl) acrylate compounds can be that 200 to 500, such as 250 to 400 or 250 are arrived 360.It, can be satisfactory by ensuring when the molecular weight of multifunctional (methyl) acrylate compounds is in the range Continuous impressionability improves efficiency, and therefore minimize series resistance (Rs) incrementss.
Multifunctional (methyl) acrylate compounds are not thermally cured after being heat-treated at 200 DEG C to 400 DEG C, and can be with It remains in gained film.In other words, multifunctional (methyl) acrylate compounds be not thermally cured after the heat treatment but It remains in gained film, and can play the role of improving substrate to the adherence of pattern.
In terms of 100 weight % of electrode constituent, multifunctional (methyl) acrylate compounds can be with 0.15 weight % to 2 Weight %, such as the amount of 0.2 weight % to 2 weight % exist.When multifunctional (methyl) acrylate compounds are in the range It is interior in use, the continuous impressionability of electrode constituent can be improved, and the adhesion strength between electrode pattern and substrate It can be improved.
Solvent can be such as hexane, toluene, ester alcohol (2,2,4- trimethyl -1,3- pentanediol mono isobutyrates；2,2,4- Trimethyl-1,3-pentanediol monoisobutyrate), methyl cellosolve, ethyl cellosolve, cyclohexanone, butyl Cellosolve, fatty alcohol, butyl carbitol (butyl carbitol) (diethylene glycol monobutyl ether), dibutyl carbitol (DBC) (diethyl Dibutyl ether), acetate of butyl carbitol (diethylene glycol monobutyl ether acetic acid esters), propylene glycol monomethyl ether, hexylene glycol, pine Oleyl alcohol, methyl ethyl ketone, benzyl alcohol, gamma butyrolactone, ethyl lactate or combination.
In terms of 100 weight % of electrode constituent, organic vehicle can be arrived with 1 weight % to 30 weight %, such as 5 weight % The amount of 15 weight % exists.When organic vehicle in the range in use, the adhesion strength between electrode pattern and substrate can To be improved, and it may insure fabulous continuous impressionability.
Electrode constituent can further include typical additive to enhance flowing property, working properties and stabilization on demand Property.Additive can include surface conditioning agent, dispersant, thixotropic agent, plasticiser, viscosity stabiliser, antifoaming agent, pigment, ultraviolet (UV) stabilizer, antioxidant, coupling agent etc..These additives can be used individually or with its form of mixtures.
In terms of 100 weight % of electrode constituent, these additives can exist with the amount of 0.1 weight % to 5 weight %.This Amount can change on demand.Print characteristics, dispersion and the storage stability that electrode constituent can be considered in the amount of additive are come Selection.
Another embodiment provides a kind of electrode formed by the electrode constituent.
Electrode can be patterned by coating electrode constituent and then and be fired and in wafer surface The form of predetermined pattern is formed.The coating of electrode constituent can be (but are not limited to) silk-screen printing, indirect gravure, cylinder print Flower, stripping etc..The electrode constituent of coating has predetermined pattern and thickness is in 10 microns to 40 micron ranges.
The firing of patterned electrodes composition object is described in detail in following solar battery process.
Another embodiment provides a kind of solar cell for including electrode.With reference to figure 1, illustrate according to one embodiment too Positive energy battery.Fig. 1 is the schematic diagram for the structure for showing the solar cell according to one embodiment.
With reference to figure 1, back electrode 210 and preceding electrode 230 are by being printed on electrode constituent comprising p layers of (or n-layer) 101 It fires to be formed as on the substrate 100 of emitter and then to it with n-layer (or p layers) 102.For example, by electrode group Into object printing be coated on the back side of substrate 100 and it is carried out at 200 DEG C to 400 DEG C heat treatment 10 seconds to 60 seconds with into Row is used for the previous preparation process of back electrode.Herein, multifunctional (methyl) acrylate compounds after the heat treatment not by Heat cure but remain in electrode constituent.
In addition, the previous preparation process for preceding electrode can carry out in the following manner：Electrode constituent is printed on In the front surface of substrate 100, and then make it dry.It then, can be at 400 DEG C to 980 DEG C, exactly 700 DEG C to 980 At DEG C fired electrodes constituent 30 seconds by 210 seconds to form preceding electrode and rear electrode.
Following instance and comparative example are provided to protrude one or the feature more than one embodiment, it should be appreciated that example It should not be construed as the range of limitation embodiment with comparative example, comparative example also should not be construed as except the range of embodiment.In addition, It should be understood that embodiment is not limited to the detail described in example and comparative example.
Example
Example 1 arrives comparative example 11 to example 7 and comparative example 1
Prepare electrode constituent as follows：Organic bond (Dow Chemical (Dow is fully dissolved at 60 DEG C Chemical Company), STD4, Mw=50,000 gram/mol) and alcohol ester (Yi Shiman (Eastman)), addition is flat thereto Ball shape silver powder (AG-5-11F, more watts of High Seience Technology Co., Ltd. (Dowa Hightech that equal particle diameter is 2.0 microns Co.Ltd.)), bismuth-tellurium leadless glass powder (mean particle diameter is 1.0 microns) (ABT-1, the limited public affairs of Asahi Glass glass share Department), (methyl) acrylate compounds, dispersant (Bi Ke (BYK) -102, Bi Ke chemical (BYK-Chemie)) and thixotropic agent (Xi Erkesiteluo ST, Hai Mingsi companies (Thixatrol ST, Elementis Co.)), is mixed, and ground with three rollers Grinding machine disperses the mixture.
(methyl) acrylate compounds can be by Mei Wang speciality chemicals Co., Ltd (Miwon Specialty Chemical Co., Ltd.) made of following compound.
Use (A) monofunctional acrylate compound 4 acrylate of phenol (EO) (meter La Mei (Miramer) M4144, Molecular weight is 324) polyethylene glycol 200 diacrylate (the meter La Mei M282, molecular weight of (B) bifunctional acrylate's compound For 308), the pentaerythritol triacrylate (meter La Mei M340, molecular weight 298) of (C) trifunctional acrylate compounds, (D) pentaerythritol tetraacrylate (meter La Mei M420, molecular weight 352) of tetrafunctional acrylate compounds and (E) three The trimethylolpropane (EO) 15 (meter La Mei M3150, molecular weight 956) of functional acrylic ester compounds.
The amount (weight %) of each component provides in table 1 below.
(table 1)
The impressionability assessment of electrode pattern
It will be respectively coated according to the electrode constituent of example 1 to example 7 and comparative example 1 to comparative example 11 in the front side of chip On, and with the naked eye count the dotted line quantity through printing electrode and it is assessed according to below with reference to standard.As a result in the following table 2 Middle offer.
5A：0,4A：Less than 3,3A：Less than 6,2A：Less than 12,1A：Less than 15 and 0A：More than or equal to 20.
The adhesion force estimation of electrode pattern
By using square size for 400 mesh screens of 5 centimetres of 5 cm x will be arrived according to example 1 to example 7 and comparative example 1 than Electrode constituent compared with example 11 is respectively printed in the front surface of chip, and dry at 300 DEG C to 400 DEG C, so as to manufacture Per a sample.Adhesion strength of the following assessment per a sample：It is made according to grid adhesion force estimation (ASTM D3359) of revolving knife 100 comb mesh patterns, to its be attached metal adhesive tape (No. 610,3M) and by the adhesive tape from its peel off, and according to The quantity of grid that lower reference standard conversion is peeled off with adhesive tape.As a result it is provided in the following table 2.
5B：0%；4B：Less than 5%；3B：It is arrived more than or equal to 5% and is less than 15%；2B：More than or equal to 15% to being less than 35%；1B：It is arrived more than or equal to 35% and is less than 65%；And 0B：More than or equal to 65%
(table 2)
Reference table 2, with respectively by the electrode pattern that is formed according to the electrode constituent of example 1 to example 7 compared with, respectively by The electrode formed according to the electrode constituent of comparative example 1, comparative example 2, comparative example 3, comparative example 5, comparative example 7 and comparative example 9 The insufficient adhesion strength of pattern displaying, and respectively by according to comparative example 4, comparative example 6, comparative example 8, comparative example 10 and comparing The electrode pattern that the electrode constituent of example 11 is formed shows satisfactory adhesion strength but lacks impressionability, and therefore increase Rs, and expected there is ill-effect to efficiency.On the contrary, respectively by being formed according to the electrode constituent of example 1 to example 7 Electrode pattern shows fabulous adhesion strength and ensures enough impressionabilities, and therefore advantageously improve efficiency.
The electrical efficiency assessment of solar cell
To chip be screen-printed to according to each electrode constituent of example 1 to example 7 and comparative example 1 to comparative example 11 (it is the polycrystalline wafers being obtained as below：Texture p-type chip in the front surface doped with boron, on it with POCl3It is formed n+Layer, and with silicon nitride (SiNx:H) form anti-reflection coating) front side on to form predetermined pattern, and by using red It is dry at 300 DEG C to 400 DEG C that boiler is dried in outside line.Then, aluminium is printed on the back side of the wafer in method same as above It pastes and makes it dry.Then the battery obtained in this process is fired in conveyor-type boiler at 400 DEG C to 900 DEG C 30 seconds to 50 seconds, so as to manufacture test battery.
Then by using solar battery efficiency measuring apparatus, (CT-801 is made by Pa Shan joint-stock companies (Pasan SA) Make) measure the electrical characteristics (fill factor and efficiency, Isc) for testing battery.As a result it is provided in the following table 3.
(table 3)
Reference table 3, compared with the solar cell by being manufactured according to the electrode constituent of comparative example 1 to comparative example 11, by Satisfactory FF and efficiency are shown according to the solar cell that the electrode constituent of example 1 to example 7 manufactures.
Although with reference to it is now recognized that practical exemplary embodiments describe the present invention, it should be appreciated that the present invention is unlimited In the disclosed embodiments, and antithesis, included within the spirit and scope of the appended claims it is intended that covering Various modifications and equivalent arrangements.

Claims (11)

1. a kind of electrode constituent, including：
Conductive powder；
Frit；And
Organic vehicle, it includes organic bond, multifunctional (methyl) acrylate compounds and solvent,
The molecular weight of wherein described multifunctional (methyl) acrylate compounds is 200 to 500 and with the electrode constituent 100 weight % meter, the multifunctional (methyl) acrylate compounds are deposited with the amount of 0.15 weight % to 0.75 weight % ,
Wherein described frit by being selected in bismuth class frit, lead class frit and its mixture,
Wherein described bismuth class frit is bismuth-tellurium frit.
2. electrode constituent according to claim 1, wherein the multifunctional (methyl) acrylate compounds are by two (first Base) in acrylate compounds, three (methyl) acrylate compounds, four (methyl) acrylate compounds and its mixture It selects.
3. electrode constituent according to claim 1, wherein the multifunctional (methyl) acrylate compounds are by following It is selected in items：Trimethylolpropane tris (methyl) acrylate, ethylene glycol two (methyl) acrylate, two (first of triethylene glycol Base) acrylate, butanediol two (methyl) acrylate, hexylene glycol two (methyl) acrylate, pentaerythrite three (methyl) third Olefin(e) acid ester, trihydroxy methyl three (methyl) acrylate, (methyl) acrylate of pentaerythrite four and its mixture.
4. electrode constituent according to claim 1, wherein in terms of 100 weight % of the electrode constituent, it is described more Function (methyl) acrylate compounds are the amount presence with 0.2 weight % to 0.75 weight %.
5. electrode constituent according to claim 1, wherein the molecule of the multifunctional (methyl) acrylate compounds Measure is 250 to 400.
6. electrode constituent according to claim 1, wherein the multifunctional (methyl) acrylate compounds are at 200 DEG C It is remained in after heat treatment in gained film to 400 DEG C.
7. electrode constituent according to claim 1, wherein the bismuth-tellurium frit includes 20 moles of % to 80 moles of % Tellurium oxide and 20 moles of % to 80 moles of % bismuth oxides.
8. electrode constituent according to claim 1, wherein the electrode group includes 60 weight % to 95 weight % into object The conductive powder, 0.5 weight % to 20 weight % the frit and 1 weight % to the described organic of 30 weight % Mediator.
9. electrode constituent according to claim 1, wherein the electrode group is further included into object by being selected in the following terms At least one additive：It is surface conditioning agent, dispersant, thixotropic agent, plasticiser, viscosity stabiliser, antifoaming agent, pigment, ultraviolet Stabilizer, antioxidant and coupling agent.
10. a kind of electrode is manufactured using the electrode constituent according to any claim in claim 1 to 9.
11. a kind of solar cell, including electrode according to claim 10.
CN201610197376.5A 2015-04-28 2016-03-31 Electrode constituent, electrode and solar cell using its manufacture Active CN106098139B (en)

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