CN106297947A - Nickel slurry for crystal silicon solar battery front resistance diffusion layer electrode and preparation method thereof - Google Patents

Nickel slurry for crystal silicon solar battery front resistance diffusion layer electrode and preparation method thereof Download PDF

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CN106297947A
CN106297947A CN201610649494.5A CN201610649494A CN106297947A CN 106297947 A CN106297947 A CN 106297947A CN 201610649494 A CN201610649494 A CN 201610649494A CN 106297947 A CN106297947 A CN 106297947A
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nickel
electrode
crystal silicon
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李涛
王文静
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Institute of Electrical Engineering of CAS
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Abstract

A kind of nickel slurry for crystal silicon solar battery front resistance diffusion layer electrode, the glass dust of nano-nickel powder, 1～5wt% by 85～95wt% and the organic carrier of 4～14wt% form.Organic carrier is placed in heated and stirred in thermostatic container, in container, adds nano-nickel powder and glass dust successively, then prepared mixture is placed in three-roll grinder grinding, afterwards by silk screen filter, obtain described nickel slurry.Nickel slurry is preset at crystal silicon solar battery front post-drying and prepares resistance diffusion layer nickel electrode, as the resistance diffusion layer electrode of crystal silicon solar battery front nickel copper/aluminum stannum base metal combination electrode, stops copper atom to spread in silicon.

Description

Nickel slurry for crystal silicon solar battery front resistance diffusion layer electrode and preparation method thereof
Technical field
The present invention relates to a kind of nickel slurry for crystal silicon solar battery electrode and preparation method thereof.
Background technology
Reducing cost is that solar cell future can be by one of essential condition of broader applications, the reduction master of battery cost The raising of battery efficiency to be depended on and the reduction of battery manufacture material cost.On the one hand, the raising of photoelectric transformation efficiency increases The generated output of unit are photovoltaic cell component, reduces the cost relevant to generating area accordingly.On the other hand, use The reduction of material cost is prepared, it is also possible to effectively reduce the cost of solar cell in battery.After the eighties in 20th century, battery The lifting of efficiency is mainly due to optimization (Green, the The path to 25% of the technology of preparing such as gate line electrode, silicon emitter silicon solar cell efficiency:History of silicon cell evolution, Prog.Photovolt:Res.Appl.,17(2009)183-189).The lifting master of conventional uniform emitter stage crystal silicon battery efficiency The improvement of size performance to be depended on.Solar cell front surface gate line electrode the most all uses high temperature sintering after printing silver slurry Method prepare, but the higher price of silver constrains the reduction of solar cell cost.Therefore, low cost, function admirable are sought Novel conductive paste, substitute noble metal with base metal and prepare electrocondution slurry and become the inexorable trend of development.From British Electric Research association has used aluminium dioxide as (Fedrizzi, Effect of powder since the conducting function phase of electrocondution slurry painting procedures on the filiform corrosion of aluminium profiles,Progress in organic coatings,59(2007)230-238；Maiti,Synthesis and characterization of molybdenum aluminide nanoparticles reinforced aluminium matrix composites, J.Alloy.Compd., 458 (2008) 450-456), various countries scientific research personnel has progressively carried out grinding about base metal electrocondution slurry Study carefully application work.In terms of electrocondution slurry, starch (Wu, Preparation of micron-sized flake for copper copper powder for base-metal-electrode multi-layer ceramic capacitor,journal of materials processing technology,209(2009)1129-1133；Wu,Preparation of fine copper powders and their application in bme-mlcc,Journal of University ofScience and Technology Beijing,Mineral,Metallurgy,Material,13(2006)250- 255), nickel slurry (Lee, Characteristics of surface-modified metal hydride electrode with flake ni by the ball-milling process,J.Alloy.Compd.,330–332(2002)835- 840；Yoshinaga,Highly densed-mh electrode using flaky nickel powder and gas- atomized hydrogen storage alloy powder,J.Alloy.Compd.,330–332(2002)846-850)、 Corronil slurry (Songping, Preparation of ultra fine copper nickel bimetallic Powders for conductive thick film, Intermetallics, 15 (2007) 1316-1321), ormolu Slurry (Kalendova, Comparison of the efficiency of inorganic nonmetal pigments with zinc powder in anticorrosion paints,Progress in organic coatings,57 (2006)1-10；Renger,Rheology studies on highly filled nano-zirconia Suspensions, Journal of the European Ceramic Society, 27 (2007) 2361-2367) all carry out Study widely, and copper slurry be successfully applied to the electrode of hydrid integrated circuit and multi-chip module prepare (Wang, Research of ltcc/cu,ag multilayer substrate in microelectronic packaging, Materials Science and Engineering:B,94(2002)48-53)。
In recent years, the demand for the silver slurry succedaneum in solar cell field grows with each passing day, the main screening of alternative metals Standard is exactly resistivity and price.The resistivity of silver is 1.59 × 10-8Ω m, and the resistivity of copper is the most slightly higher, is 1.75 ×10-8Ω·m.Further, the price of copper is far below silver, and the data of Shanghai on the 1st July in 2016 futures exchange show, the valency of copper Lattice are about 45 yuan/kg, and the price of silver is about 4309 yuan/kg (Http: //www.Shfe.Com.Cn/), the price of copper only phase When one of nearly percentage in silver, therefore use copper as the conducting function phase of electrocondution slurry, preparation electricity can be reduced greatly The material cost in pond.Copper, in resistivity and the advantage of two aspects of cost, becomes and substitutes the optimum selection of silver in electrocondution slurry, adopt Substitute argentum powder with copper powder to starch as the copper of conducting function phase and become study hotspot in recent years.
The gate line electrode of conventional solar cell is sinter molding after silk screen printing silver is starched, and this process generally uses Schubert Sintering Model (Schubert, Thick film metallisation of crystalline silicon solar cells:Mechanisms,models and applications,PhD(2006)；Schubert,Current transport mechanism in printed ag thick film contacts to an n-type-emiter of a crystalline solar cell 19th European Solar Energy Conference and Exhibition, (2004) 813 816) describe: in sintering process, organic carrier be heated after gradually volatiling reaction.Work as temperature When reaching glass transition temperature, the glass dust in silver slurry starts to soften.Soften state glass-coated argentum powder, penetrate into silver slurry simultaneously And infiltrate on the interface between silicon emitter and etch SiNx: H thin film.Soften state glass etching SiNx: after H thin film, glass dust In lead oxide and silicon generation redox reaction, the interface zone at silicon emitter with printing slurry generates metallic lead, with slurry Silver contact in material, reduces silver point, generates the pb-ag alloy of liquid phase, and silver has certain diffusion in silicon.Due to liquid phase Pb-ag alloy is different to the etch rate in each crystal orientation of silicon emitter so that etched surface is inverted pyramid structure.When temperature reduces Time, pb-ag alloy is according to phasor split-phase, and silver recrystallization is on (111) face of inverted pyramid.And when using copper slurry to substitute silver slurry, meeting Two technical barriers occur, in sintering process, the oxidation of copper and the height of launch site caused due to the diffusion of copper are combined.One side Face, copper is oxidizable relative to galactic pole, and the oxide layer of Surface Creation can not stop the continuation of internal oxidation occur (Hu, Kinetic investigation of copper film oxidation by spectroscopic ellipsometry and reflectometry,Journal of Vacuum Science&Technology A:Vacuum,Surfaces,and Films, 18 (2000) 2527-2532), the copper oxide resistivity of generation is relatively big, significantly increases the line resistance of gate line electrode, And then have impact on the raising of solar cell performance.And if entirely without the existence of oxygen, back surface and main schedule in sintering atmosphere Resinous principle in starch adhesive material all can not become volatile oxide, it is difficult to removes from battery surface.On the other hand, due to copper Having bigger diffusion coefficient in silicon materials, copper diffusion coefficient in silicon is about 7.3 × 10-8cm2/ s, much larger than the diffusion of silver Coefficient 1.5 × 10-15cm2/s(Fisher,Diffusion in silicon,(1998)).Copper atom diffuses through deeply in silicon, Can reduce the life-span of carrier, improve compound saturation current density J caused02And reduce open-circuit voltage, even and if at low temperature It is also possible to penetrate emitter region under environment and causes electric leakage, especially hinder its popularization in shallow junction solar cell field.
In recent years, having carried out substantial amounts of work both at home and abroad in terms of the research of copper slurry, core is all intended to solve sintering process In, the technical barrier of the oxidizable and easy diffusion of copper.In order to stop copper atom diffusion in silicon in sintering process, mainly use expansion Dissipate barrier technology.The research that northeastern Japan university is correlated with, by preparing the oxidation of 5～10nm on battery emitter stage Layer as diffusion impervious layer with stop copper diffusion.But, use preparation oxide layer as the method for diffusion impervious layer, add Technology step, and the oxidation technology temperature of crystal silicon solar battery reaches more than 900 DEG C, relatively big to the hot injury of silicon chip, fall Low solar cell electrical property.
Summary of the invention
It is an object of the invention to overcome prior art to be difficult to solve the technical barrier that copper easily spreads, propose one for crystalline substance Nickel slurry of silicon solar cell front resistance diffusion layer electrode and preparation method thereof.The present invention uses the nickel slurry preparation nickel copper/low-priced gold of aluminum stannum Belong to the resistance diffusion layer electrode of combination electrode, both can solve the technical barrier that copper easily spreads, it is also possible to cost of sizing agent is greatly reduced.
For achieving the above object, the present invention use nikel powder base metal granule as conducting function phase, in conjunction with Binder Phase with have The performances such as airborne body regulation and control slurry bonding, thixotropy, rheological characteristic, are preset at crystal silicon solar battery front post-drying, prepare resistance and expand Dissipate layer nickel electrode, as the resistance diffusion layer electrode of crystal silicon solar battery front nickel copper/aluminum stannum base metal combination electrode, stop copper Atom spreads in silicon.
The present invention for crystal silicon solar battery front resistance diffusion layer electrode nickel slurry by 85～95wt% nano-nickel powder, 1 ～the glass dust of 5wt% and 4～14wt% organic carrier composition.
The particle diameter of described nano-nickel powder is 500～800nm, and purity is more than 99%.
Described nickel slurry is preset at crystal silicon solar battery front, prepares resistance diffusion layer nickel electrode, as crystal silicon too after drying The resistance diffusion layer electrode of sun battery front side nickel copper/aluminum stannum base metal combination electrode, stops copper atom to spread in silicon.
The preparation method of described nickel slurry is as follows:
(1) organic carrier is placed in container, described container is placed in the thermostatic water bath that temperature is 60～80 DEG C, with 90 ～the organic carrier that the speed of 180 revs/min is stirred continuously in container, heated and stirred 1～after 10 hours, with 5～30g/min Speed adds nano-nickel powder, prepares mixture a.
(2) thermostatic water bath temperature is brought up to 80～100 DEG C, be stirred continuously container with the speed of 120～200 revs/min The mixture a that middle step (1) prepares, heated and stirred 1～after 5 hours, the speed with 1～5g/min adds glass dust, prepares mixed Compound b.
(3) the mixture b that step (2) prepares being placed in three-roll grinder grinding, milling time is 6～8 hours, prepares Mixture c.
(4) the mixture c prepared by the silk screen filter step (3) of 300～400 mesh, for crystal silicon solar battery just prepares The nickel slurry of face resistance diffusion layer electrode.
In described step (1) and step (2), the percentage by weight of the nano-nickel powder, glass dust and the organic carrier that are added It is respectively 85～95wt%, 1～5wt% and 4～14wt%.
The particle diameter of described nano-nickel powder is 500～800nm, and purity is more than 99%.Glass dust by the PbO of 45wt%, The TeO of 25wt%2, the SiO of 17wt%2, the A1 of 6wt%2O3, the B of 4wt%2O3, the Bi of 3wt%2O3Composition, by PbO, TeO2、 SiO2、A12O3、B2O3And Bi2O3Mix in proportion and be placed in 1400 DEG C of Muffle furnaces heating, quench also after insulation 60min Ball milling prepares.Organic carrier is by the butyl of 62wt%, the tributyl citrate of 15wt%, the ethyl cellulose of 2wt% Element, the Polyethylene Glycol composition of the polyamide wax of 6wt%, the lecithin of 6wt%, the tributyl phosphate of 5wt%, 4wt%, by diethyl Glycol butyl ether, tributyl citrate, ethyl cellulose, polyamide wax, lecithin, tributyl phosphate and Polyethylene Glycol mix in proportion Close and be uniformly placed in 80 DEG C of thermostatic containers, stir 5 hours and prepare.
Beneficial effects of the present invention is embodied in:
(1) nickel slurry is used to replace silver to starch, the resistance diffusion layer electrode of preparation nickel copper/aluminum stannum base metal combination electrode, the most real Existing low cost, satisfactory electrical conductivity and low diffusibility.
(2) use nanometer resistance diffusion layer technology, use the bottom electrode of printing nano nickel slurry preparation as stoping copper atom To the barrier layer of silicon emitter diffusion, nickel diffusion coefficient in silicon is about 2.4 × 10-15cm2/ s, much smaller than the diffusion system of copper Number, it is possible to be prevented effectively from the diffusion problem of copper.
(3) resistivity of nickel is 6.84 × 10-6Ω cm, and nickel dam is relatively thin, and thickness is less than 1 μm, and combination electrode is main Composition or copper.The resistivity of silver is 1.59 × 10-8Ω m, and the resistivity of copper is the most slightly higher, is 1.75 × 10-8Ω· m.Therefore combination electrode resistivity is suitable with silver electrode.Further, the price of nickel is about 100 yuan/kg, far below 4309 yuan/kg of silver Price, it is ensured that the cheap advantage of combination electrode.
With regard to application prospect aspect, the data of IEA and CPIA show, end the accumulative installation amount in the whole world in 2015 more than 200GW, Just install 53GW in only 2015 whole world, domestic installation 15GW.Global solar module yield in 2015 is about 60GW, domestic about For 43GW.In the solar cell technology of preparing of various industrialization, crystal silicon solar battery technology accounts for more than 90% share, and silver-colored Slurry is the prime cost expenditure of crystal silicon solar battery, and market potential is huge.Single according to the most conventional crystal silicon battery efficiency and silver slurry Consumption budgetary estimate, within 2015, whole world silver slurry consumption is about 1626 tons, domestic about 1165 tons.Even if it is it is to say, sudden and violent at whole world silver valency 2015 fallen, whole world silver slurry also consumed nearly 9,800,000,000 yuan, domestic consumption nearly 7,000,000,000 yuan.And along with photovoltaic market is recovered, brilliant Silion cell yield cumulative year after year, staple commodities price stabilizes, and the following silver that will consume hundreds of hundred million for 1 year is starched.And if adopted Use base metal slurry, it will greatly reduce electrocondution slurry cost.Do a simple measuring and calculating, it is assumed that base metal combination electrode with Silver electrode has same shape, and nickel, copper, the volume ratio of aluminum stannum single-layer electrodes are 2:40:1, simultaneously except gold in base metal slurry Metal particles other component prices outer are identical with silver slurry, then after silver slurry is by base metal slurry replacing whole of the present invention, and whole world crystal silicon Solar cell slurry one be only about consumption 100,000,000 yuan, domestic about consumption 0.7 hundred million yuan, one of percentage before just corresponding to, greatly Reduce production cost.If silver slurry is all replaced by base metal slurry of the present invention, the whole world announced according to CPIA and state's inner assembly Global and the domestic cost-effective volume of base metal slurry of yield estimation, in 2016 years, whole world cost of sizing agent can cut down 10,500,000,000 Unit, domestic cost of sizing agent cuts down 8,000,000,000 yuan.Although the present invention program adds secondary printing operation, add certain equipment and throw Entering, but produce daily as a example by the product line of 30000 by wall scroll, the slurry consumption of 1 year just can save 7,800,000 yuan, completely covers and sets Standby input, the printing equipment still more increased can use for many years.
Accompanying drawing explanation
Fig. 1 nickel slurry component schematic diagram.
Fig. 2 crystal silicon solar battery front nickel copper/aluminum stannum base metal combined electrode structure schematic diagram.
Detailed description of the invention
As it is shown in figure 1, the present invention starches by 85～95wt% for the nickel of crystal silicon solar battery front resistance diffusion layer electrode The glass dust of nano-nickel powder, 1～5wt% and the organic carrier composition of 4～14wt%.
The present invention uses nikel powder base metal granule as conducting function phase, regulates and controls slurry in conjunction with Binder Phase and organic carrier and glues The performances such as knot, thixotropy, rheological characteristic, are preset at crystal silicon solar battery front post-drying, prepare resistance diffusion layer nickel electrode, as crystalline substance The resistance diffusion layer electrode of silicon solar cell front nickel copper/aluminum stannum base metal combination electrode, stops copper atom to spread in silicon.Institute The bottom of the crystal silicon solar battery front nickel copper/aluminum stannum base metal combination electrode stated is resistance diffusion layer nickel electrode, and middle level is conduction Layer copper electrode, top layer is anti oxidation layer aluminum tin electrode, as shown in Figure 2.
Embodiment 1
(1) organic carrier of 14wt% is placed in container, described container is placed in the thermostatic water bath that temperature is 60 DEG C, The organic carrier being stirred continuously in container with the speed of 180 revs/min, heated and stirred, after 10 hours, adds with the speed of 5g/min Enter the nano-nickel powder of 85wt%, prepare mixture a.Wherein, the particle diameter of nano-nickel powder is 500～800nm, and purity is more than 99%； Organic carrier is by the butyl of 62wt%, the tributyl citrate of 15wt%, the ethyl cellulose of 2wt%, 6wt% Polyamide wax, the lecithin of 6wt%, the tributyl phosphate of 5wt%, 4wt% Polyethylene Glycol composition, by butyl, After tributyl citrate, ethyl cellulose, polyamide wax, lecithin, tributyl phosphate and Polyethylene Glycol mix in proportion It is placed in 80 DEG C of thermostatic containers, stirs 5 hours and prepare.
(2) thermostatic water bath temperature is brought up to 80 DEG C, the step (1) being stirred continuously in container with the speed of 200 revs/min The mixture a prepared, heated and stirred, after 5 hours, adds the glass dust of 1wt%, prepares mixture b with the speed of 1g/min.Glass Glass powder is by the TeO of PbO, 25wt% of 45wt%2, the SiO of 17wt%2, the A1 of 6wt%2O3, the B of 4wt%2O3, 3wt% Bi2O3Composition, by PbO, TeO2、SiO2、A12O3、B2O3And Bi2O3Mix in proportion to be placed in 1400 DEG C of Muffle furnaces and add Heat, after insulation 60min, quenching ball milling prepare.
(3) the mixture b that step (2) prepares being placed in three-roll grinder grinding, milling time is 8 hours, prepares mixed Compound c.
(4) the mixture c prepared by the silk screen filter step (3) of 300 mesh, prepares the resistance for crystal silicon solar battery front and expands Dissipate the nickel slurry of layer electrode.
Embodiment 2
(1) organic carrier of 10wt% is placed in container, described container is placed in the thermostatic water bath that temperature is 70 DEG C, The organic carrier being stirred continuously in container with the speed of 140 revs/min, heated and stirred, after 5 hours, adds with the speed of 20g/min Enter the nano-nickel powder of 85wt%, prepare mixture a.Wherein, the particle diameter of nano-nickel powder is 500～800nm, and purity is more than 99%； Organic carrier is by the butyl of 62wt%, the tributyl citrate of 15wt%, the ethyl cellulose of 2wt%, 6wt% Polyamide wax, the lecithin of 6wt%, the tributyl phosphate of 5wt%, 4wt% Polyethylene Glycol composition, by butyl, After tributyl citrate, ethyl cellulose, polyamide wax, lecithin, tributyl phosphate and Polyethylene Glycol mix in proportion It is placed in 80 DEG C of thermostatic containers, stirs 5 hours and prepare.
(2) thermostatic water bath temperature is brought up to 90 DEG C, the step (1) being stirred continuously in container with the speed of 160 revs/min The mixture a prepared, heated and stirred, after 3 hours, adds the glass dust of 5wt%, prepares mixture b with the speed of 3g/min.Glass Glass powder is by the TeO of PbO, 25wt% of 45wt%2, the SiO of 17wt%2, the A1 of 6wt%2O3, the B of 4wt%2O3, 3wt% Bi2O3Composition, by PbO, TeO2、SiO2、A12O3、B2O3And Bi2O3Mix in proportion to be placed in 1400 DEG C of Muffle furnaces and add Heat, after insulation 60min, quenching ball milling prepare.
(3) the mixture b that step (2) prepares being placed in three-roll grinder grinding, milling time is 7 hours, prepares mixed Compound c.
(4) the mixture c prepared by the silk screen filter step (3) of 400 mesh, prepares the resistance for crystal silicon solar battery front and expands Dissipate the nickel slurry of layer electrode.
Embodiment 3
(1) organic carrier of 10wt% is placed in container, described container is placed in the thermostatic water bath that temperature is 80 DEG C, The organic carrier being stirred continuously in container with the speed of 90 revs/min, heated and stirred, after 1 hour, adds with the speed of 30g/min The nano-nickel powder of 89wt%, prepares mixture a.Wherein, the particle diameter of nano-nickel powder is 500～800nm, and purity is more than 99%；Have Airborne body by the butyl of 62wt%, the tributyl citrate of 15wt%, the ethyl cellulose of 2wt%, 6wt% poly- Amide waxe, the lecithin of 6wt%, the tributyl phosphate of 5wt%, the Polyethylene Glycol composition of 4wt%, by butyl, lemon Lemon acid tributyl, ethyl cellulose, polyamide wax, lecithin, tributyl phosphate and Polyethylene Glycol mix in proportion rearmounted In 80 DEG C of thermostatic containers, stir 5 hours and prepare.
(2) thermostatic water bath temperature is brought up to 100 DEG C, the step being stirred continuously in container with the speed of 120 revs/min (1) the mixture a prepared, heated and stirred, after 1 hour, adds the glass dust of 1wt%, prepares mixture b with the speed of 5g/min. Glass dust is by the TeO of PbO, 25wt% of 45wt%2, the SiO of 17wt%2, the A1 of 6wt%2O3, the B of 4wt%2O3, 3wt% Bi2O3Composition, by PbO, TeO2、SiO2、A12O3、B2O3And Bi2O3Mix in proportion to be placed in 1400 DEG C of Muffle furnaces and add Heat, after insulation 60min, quenching ball milling prepare.
(3) the mixture b that step (2) prepares being placed in three-roll grinder grinding, milling time is 6 hours, prepares mixed Compound c.
(4) the mixture c prepared by the silk screen filter step (3) of 350 mesh, prepares the resistance for crystal silicon solar battery front and expands Dissipate the nickel slurry of layer electrode.
Embodiment 4
(1) organic carrier of 4wt% is placed in container, described container is placed in the thermostatic water bath that temperature is 65 DEG C, The organic carrier being stirred continuously in container with the speed of 120 revs/min, heated and stirred, after 8 hours, adds with the speed of 15g/min Enter the nano-nickel powder of 95wt%, prepare mixture a.Wherein, the particle diameter of nano-nickel powder is 500～800nm, and purity is more than 99%； Organic carrier is by the butyl of 62wt%, the tributyl citrate of 15wt%, the ethyl cellulose of 2wt%, 6wt% Polyamide wax, the lecithin of 6wt%, the tributyl phosphate of 5wt%, 4wt% Polyethylene Glycol composition, by butyl, After tributyl citrate, ethyl cellulose, polyamide wax, lecithin, tributyl phosphate and Polyethylene Glycol mix in proportion It is placed in 80 DEG C of thermostatic containers, stirs 5 hours and prepare.
(2) thermostatic water bath temperature is brought up to 85 DEG C, the step (1) being stirred continuously in container with the speed of 180 revs/min The mixture a prepared, heated and stirred, after 3 hours, adds the glass dust of 1wt%, prepares mixture b with the speed of 4g/min.Glass Glass powder is by the TeO of PbO, 25wt% of 45wt%2, the SiO of 17wt%2, the A1 of 6wt%2O3, the B of 4wt%2O3, 3wt% Bi2O3Composition, by PbO, TeO2、SiO2、A12O3、B2O3And Bi2O3Mix in proportion to be placed in 1400 DEG C of Muffle furnaces and add Heat, after insulation 60min, quenching ball milling prepare.
(3) the mixture b that step (2) prepares being placed in three-roll grinder grinding, milling time is 6.5 hours, prepares Mixture c.
(4) the mixture c prepared by the silk screen filter step (3) of 300 mesh, prepares the resistance for crystal silicon solar battery front and expands Dissipate the nickel slurry of layer electrode.
Embodiment 5
(1) organic carrier of 8wt% is placed in container, described container is placed in the thermostatic water bath that temperature is 75 DEG C, The organic carrier being stirred continuously in container with the speed of 160 revs/min, heated and stirred, after 3 hours, adds with the speed of 25g/min Enter the nano-nickel powder of 90wt%, prepare mixture a.Wherein, the particle diameter of nano-nickel powder is 500～800nm, and purity is more than 99%； Organic carrier is by the butyl of 62wt%, the tributyl citrate of 15wt%, the ethyl cellulose of 2wt%, 6wt% Polyamide wax, the lecithin of 6wt%, the tributyl phosphate of 5wt%, 4wt% Polyethylene Glycol composition, by butyl, After tributyl citrate, ethyl cellulose, polyamide wax, lecithin, tributyl phosphate and Polyethylene Glycol mix in proportion It is placed in 80 DEG C of thermostatic containers, stirs 5 hours and prepare.
(2) thermostatic water bath temperature is brought up to 95 DEG C, the step (1) being stirred continuously in container with the speed of 160 revs/min The mixture a prepared, heated and stirred, after 2 hours, adds the glass dust of 2wt%, prepares mixture b with the speed of 2g/min.Glass Glass powder is by the TeO of PbO, 25wt% of 45wt%2, the SiO of 17wt%2, the A1 of 6wt%2O3, the B of 4wt%2O3, 3wt% Bi2O3Composition, by PbO, TeO2、SiO2、A12O3、B2O3And Bi2O3Mix in proportion to be placed in 1400 DEG C of Muffle furnaces and add Heat, after insulation 60min, quenching ball milling prepare.
(3) the mixture b that step (2) prepares being placed in three-roll grinder grinding, milling time is 7.5 hours, prepares Mixture c.
(4) the mixture c prepared by the silk screen filter step (3) of 400 mesh, prepares the resistance for crystal silicon solar battery front and expands Dissipate the nickel slurry of layer electrode.
Performance test example
Use 156 × 156mm2Polysilicon chip, the resistance battery corresponding to diffusion layer nickel electrode of embodiment 1～5 preparation Performance, at AM 1.5G, 100mW/cm2, under conditions of 25 DEG C, use the test of I-V tester, result is as shown in table l.
Table 1, embodiment battery performance.
The present invention Open-circuit voltage (V) Short circuit current (A) Fill factor, curve factor (%) Electricity conversion (%)
Embodiment 1 0.622 8.88 78.01 17.72
Embodiment 2 0.623 8.84 78.09 17.68
Embodiment 3 0.625 8.86 78.01 17.77
Embodiment 4 0.627 8.86 77.84 17.79
Embodiment 5 0.628 8.84 78.16 17.83

Claims (6)

1. the nickel slurry for crystal silicon solar battery front resistance diffusion layer electrode, it is characterised in that: described nickel slurry by 85～ The glass dust of the nano-nickel powder of 95wt%, 1～5wt% and the organic carrier composition of 4～14wt%；The grain of described nano-nickel powder Footpath is 500～800nm, and purity is more than 99%；Described nickel slurry is preset at crystal silicon solar battery front, prepares resistance diffusion after drying Layer nickel electrode, as the resistance diffusion layer electrode of crystal silicon solar battery front nickel copper/aluminum stannum base metal combination electrode, stops copper former Son spreads in silicon；The bottom of described crystal silicon solar battery front nickel copper/aluminum stannum base metal combination electrode is resistance diffusion layer nickel Electrode, middle level is conductive layer copper electrode, and top layer is anti oxidation layer aluminum tin electrode.
2. the method for crystal silicon solar battery front resistance diffusion layer electrode nickel slurry described in preparation claim 1, its feature exists In: described preparation method step is as follows:
(1) organic carrier is placed in container, described container is placed in the thermostatic water bath that temperature is 60～80 DEG C, with 90～ The speed of 180 revs/min is stirred continuously the organic carrier in container, heated and stirred 1～after 10 hours, with the speed of 5～30g/min Rate adds nano-nickel powder, prepares mixture a；
(2) thermostatic water bath temperature is brought up to 80～100 DEG C, be stirred continuously in container step with the speed of 120～200 revs/min Suddenly the mixture a that (1) prepares, heated and stirred 1～after 5 hours, the speed with 1～5g/min adds glass dust, prepares mixture b；
(3) the mixture b that step (2) prepares being placed in three-roll grinder grinding, milling time is 6～8 hours, prepares mixing Thing c；
(4) the mixture c prepared by the silk screen filter step (3) of 300～400 mesh, prepares and hinders for crystal silicon solar battery front The nickel slurry of diffusion layer electrode.
Preparation method the most according to claim 2, it is characterised in that: in described step (1) and step (2), added The percentage by weight of nano-nickel powder, glass dust and organic carrier is respectively 85～95wt%, 1～5wt% and 4～14wt%.
Preparation method the most according to claim 2, it is characterised in that: the particle diameter of described nano-nickel powder be 500～ 800nm, purity is more than 99%.
Preparation method the most according to claim 2, it is characterised in that: described glass dust is by PbO, 25wt% of 45wt% TeO2, the SiO of 17wt%2, the A1 of 6wt%2O3, the B of 4wt%2O3, the Bi of 3wt%2O3Composition, by PbO, TeO2、SiO2、 A12O3、B2O3And Bi2O3Mix in proportion and be placed in 1400 DEG C of Muffle furnaces heating, quenching ball milling system after insulation 60min ?.
Preparation method the most according to claim 2, it is characterised in that: described organic carrier is by the diethylene glycol of 62wt% Butyl ether, the tributyl citrate of 15wt%, the ethyl cellulose of 2wt%, the polyamide wax of 6wt%, the lecithin of 6wt%, The tributyl phosphate of 5wt%, 4wt% Polyethylene Glycol composition, by butyl, tributyl citrate, ethyl cellulose, Polyamide wax, lecithin, tributyl phosphate and Polyethylene Glycol mix in proportion and are placed in 80 DEG C of thermostatic containers, stir 5 Hour prepare.
CN201610649494.5A 2016-08-10 2016-08-10 Nickel slurry for crystal silicon solar battery front resistance diffusion layer electrode and preparation method thereof Pending CN106297947A (en)

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