CN102126829A - Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste - Google Patents
Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste Download PDFInfo
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- CN102126829A CN102126829A CN 201010555333 CN201010555333A CN102126829A CN 102126829 A CN102126829 A CN 102126829A CN 201010555333 CN201010555333 CN 201010555333 CN 201010555333 A CN201010555333 A CN 201010555333A CN 102126829 A CN102126829 A CN 102126829A
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Abstract
The invention discloses lead-free glass powder, a preparation method thereof, silver paste containing the glass powder and a crystal silicon solar cell manufactured by using the silver paste. The lead-free glass powder comprises the following components in percentage by weight: 20-30 percent of SiO2, 2-15 percent of B2O3, 40-70 percent of Bi2O3, 1-10 percent of ZnO, 1-10 percent of Al2O3 and 1-5 percent of BaO. The preparation method comprises the following steps of: (1) weighing the components for preparing a mixture; (2) putting the mixture into a crucible for melting; (3) performing water quenching on molten glass; (4) drying; (5) smashing the mixture into powder by planetary ball milling; and (6) screening. The needed silver paste is prepared from the lead-free glass powder, silver powder, an additive and an organic carrier. A solar panel front face electrode and a grid line are manufactured by performing screen printing and sintering on conductive silver paste on a cell substrate, so that the needed solar cell is obtained. The lead-free glass powder has low melting temperature, low softening temperature and low linear expansion factor.
Description
Technical field
The present invention relates to a kind of lead-free glass powder and preparation method thereof and contain the silver paste of this glass powder and the crystal silicon solar batteries made from this silver paste, specifically a kind of crystal silicon solar batteries front electrode and grid line are unleaded palladium powder of using of crystal silicon solar batteries positive silver paste and preparation method thereof with the positive silver paste that contains this glass powder and with the crystal silicon solar batteries of this positive silver paste manufacturing with the mineral binder bond of conductive silver paste.
Background technology
Sun power is a kind of green energy resource, and is pollution-free, inexhaustible because of it, not more and more be subject to people's attention by advantages such as region resource limit, so solar cell has arisen at the historic moment.Crystal silicon solar batteries is a kind of semiconducter device that solar energy converting can be become electric energy, and solar cell can produce electric current under the condition of illumination, electric collecting is got up and transfers out by grid line and electrode.Crystal silicon solar batteries front surface electrode and grid line all are to be made by technologies such as the silk screen printing of conductive silver paste by high-speed, high precision, oven drying at low temperature, high temperature sinterings.This conductive silver paste is prepared from by silver powder, glass powder and organic carrier usually.Wherein glass powder liquefies when Fast Sintering, plays cohesive action between silver powder and silicon substrate, plays the effect that penetrates antireflective coating simultaneously, makes between silver powder and the silicon substrate and forms good Ohmic contact.The composition of glass powder, content, size and softening temperature can directly influence contact resistance, penetrate the conductivity of antireflective coating ability, electrode and the sticking power between electrode and the substrate etc., thereby influence the electricity conversion and the work-ing life of solar cell.
At present in the crystal silicon solar batteries positive silver paste for reducing the temperature of fusion when making glass powder, widely used low-melting-point glass all contains plumbous oxide mostly, and is plumbous bigger to human health risk, can gather in vivo and causes lead poisoning.In order to safeguard human living environment of depending on for existence better, developed countries such as European Union, the U.S., Japan have formulated oneself environmental protection policy one after another, and it is produced and the electronic product of import carries out environmental protection and limits.Electronic product is unleaded to have become next step development trend of electronics manufacturing.
Announced the unleaded middle low temperature glass of some bismuthate systems in the patent application documents such as Chinese patent publication number CN101376561A, CN101215091A, but these glass generally are applicable to the sealing-in of plasma display (PDP), fluorescence display (VFD), cathode-ray tube display (CRD) and the preparation of general electric slurry, these patent application documents do not require the particle diameter of described glass powder, the sintering character that unfavorable control is follow-up.In CN101215091A, its disclosed lead-free glass powder, its softening temperature reach 560 ℃, though lower than the softening temperature of traditional glass, but still belong to comparatively high temps.In CN101376561A, the moiety complexity of its glass powder is more, reaches more than 12 kinds of composition raw materials, causes difficulty to production control, and its temperature of fusion be up to 1450 the degree, identical with traditional glass, do not embody it and have low melting point.
Summary of the invention
Technical problem to be solved by this invention is at making the temperature of fusion height that exists in the lead-free glass powder, softening temperature height, composition raw material complexity, problem that the glass powder particle diameter is big in the prior art, a kind of lead-free glass powder and preparation method thereof is provided and contains the silver paste of this glass powder and the crystal silicon solar batteries made from this silver paste, the composition raw material of this lead-free glass powder is simple, temperature of fusion is low, softening temperature is low, the glass powder particle diameter is thin, the silver paste excellent performance of being prepared has high photoelectric conversion rate with the crystal silicon solar batteries of this silver paste manufacturing.
Solving the technical scheme that technical problem of the present invention adopts is: a kind of lead-free glass powder, its component comprises Bi
2O
3, ZnO, Al
2O
3, B
2O
3, SiO
2, BaO, each component weight percent content is SiO
220～30%, B
2O
32～15%, Bi
2O
340～70%, ZnO 1～10%, Al
2O
31～10% and BaO 1～5%.
Preferably lead-free glass powder is that described component compound is 1100～1300 ℃ at smelting temperature, and insulation 10～30min founds and forms.
Preferably the particle diameter of described lead-free glass powder is that magnitude range is the palladium powder of 0.5～5 μ m.
The glass powder particle diameter is below the 10um less than 5um with assurance silver paste fineness; The glass powder particle diameter is more little, and surface active can be high more, is more conducive to the reaction with antireflective coating in the silver paste sintering process.
Further preferably the particle diameter form of described lead-free glass powder is random Polygons.
Preferably the softening temperature of described lead-free glass powder is 425～500 ℃, and linear expansivity is 75～95 * 10
-7/ ℃.
A kind of crown glass powder, preparation method thereof of the present invention may further comprise the steps:
(1) take by weighing each component raw material preparation compound by weight percentage, promptly this crown glass powder component is Bi
2O
3, ZnO, Al
2O
3, B
2O
3, SiO
2, BaO, its matter weight percent content is SiO
220～30%, B
2O
32～15%, Bi
2O
340～70%, ZnO 1～10%, Al
2O
31～10% and BaO 1～5%;
(2) compound is heated melting;
(3) with the glass metal shrend that melts;
(4) frit after the oven dry shrend;
(5) glass frit after will drying is broken into powder;
(6) sieve, the glass powder particle diameter is at 0.5～5 μ m and following palladium powder.
Measure the linear expansivity and the softening temperature of this glass powder afterwards, the softening temperature of described glass powder is 425～500 ℃ after tested, and linear expansivity is 75～95 * 10
-7/ ℃.
Be that compound is put into corundum crucible with the compound melting in the step (2) preferably, in the melting of electric furnace internal heating.
Further preferably described melting is that the heating smelting temperature is 1100～1300 ℃, insulation 10～30min.
Shrend glass frit after preferably will drying in the step (5) is broken into powder and adopts the planetary ball mill method to pulverize.
Among the present invention in the moiety of glass powder, Bi
2O
3Be in order significantly to reduce the softening temperature of glass; Add SiO
2And Al
2O
3Can reduce the tendency towards devitrification of glass, improve the chemical stability and the thermostability of glass, can be used to regulate the linear expansivity and the sealing temperature of glass; B
2O
3Can improve thermostability, the chemical stability of glass, also play the effect of fluxing; BaO is glassy transition point, softening temperature and the sintering temperature that is used for regulating glass powder, can reduce the temperature of fusion of glass simultaneously, but its amount is unsuitable many, otherwise can influence the linear expansivity of glass.The adding of ZnO can increase the chemical stability and the water tolerance of glass, reduces the linear expansivity of glass simultaneously.
A kind of silver paste that contains the above lead-free glass powder of the present invention is with described lead-free glass powder and silver powder, additive and organic carrier preparation gained.
Preferably the weight percent of the contained component of silver paste consists of the 1-10% that described lead-free glass powder accounts for the silver paste gross weight, and silver powder accounts for the 65-85% of silver paste gross weight, and organic carrier accounts for the 10-20% of silver paste gross weight, additive TiO
2Account for the 0.1-1% of silver paste gross weight.
The crystal silicon solar batteries that the above silver paste of a kind of usefulness of the present invention is made promptly makes solar panel front electrode and grid line with conductive silver paste through the silk screen printing sintering with above-described silver paste on cell substrates, obtain required solar cell.
Beneficial effect of the present invention is: unleaded palladium powder of the present invention and substrate have high adhesive force, low softening temperature and low linear expansivity, and preparation technology is simple, after the planetary ball mill pulverizing, this glass powder particle diameter is little, be unleaded palladium powder, with this glass powder as the bonding mutually the preparation conductive silver paste, with silver powder, silicon substrate soaks into good, be fit to the high-speed, high precision silk screen printing, make crystal silicon solar batteries front electrode and grid line, can effectively penetrate antireflective coating behind the sintering, form the good ohmic contact interface with silicon substrate, the strong adhesion of electrode and grid line and substrate (being not less than 12MPa), indeformable, monocrystalline silicon battery sheet photoelectric transformation efficiency is up to more than 17.5%.
Description of drawings
Fig. 1 is the SEM figure of the glass powder among the embodiment 1;
The conductive silver paste that Fig. 2 is mixed with for the glass powder that adopts among the embodiment 1, the metallograph of the electrode that behind sintering, prepares (1 *).
Embodiment
A kind of lead-free glass powder of the present invention, its component comprises Bi
2O
3, ZnO, Al
2O
3, B
2O
3, SiO
2, BaO, each component weight percent content is SiO
220～30%, B
2O
32～15%, Bi
2O
340～70%, ZnO 1～10%, Al
2O
31～10% and BaO 1～5%, can be used as crystal silicon solar batteries front electrode and grid line mineral binder bond with conductive silver paste.Lead-free glass powder is that described component compound is 1100～1300 ℃ at smelting temperature, and insulation 10～30min founds and forms; The magnitude range of the particle diameter of described lead-free glass powder is 0.5～5 μ m and following palladium powder.The particle diameter form of lead-free glass powder is random Polygons.
The crown glass powder, preparation method thereof may further comprise the steps: (1) takes by weighing each component raw material preparation compound by weight percentage; (2) compound is heated melting; (3) with the glass metal shrend that melts; (4) frit after the oven dry shrend; (5) the shrend glass frit after will drying is broken into powder; (6) sieve, the glass powder particle diameter is controlled at the palladium powder of 0.5～5 μ m.Measure the linear expansivity and the softening temperature of this glass powder at last.Be that compound is put into crucible with the compound melting in the step (2), in the melting of electric furnace internal heating.Described crucible is a corundum crucible, and described melting is that the heating smelting temperature is 1100～1300 ℃, insulation 10～30min.Shrend glass frit after will drying in the step (5) is broken into powder and adopts the planetary ball mill method.
The silver paste that contains the above lead-free glass powder is with described lead-free glass powder and silver powder, additive and organic carrier preparation gained.The weight percent of the contained component of silver paste consists of the 1-10% that described lead-free glass powder accounts for the silver paste gross weight, and silver powder accounts for the 65-85% of silver paste gross weight, and organic carrier accounts for the 10-20% of silver paste gross weight, and additive accounts for the 0.1-1% of silver paste gross weight.Described organic carrier can be to comprise organic solvent, thickening material, softening agent, tensio-active agent and thixotropic agent: organic solvent occupies 60～80% of airborne body gross weight, is a kind of in Terpineol 350, tributyl citrate, turpentine wood oil, the Trivalin SF or any multiple mixture; Thickening material occupies 5～20% of airborne body gross weight, be a kind of or any multiple mixture in ethyl cellulose, acrylic acid ester, the Nitrocellulose, softening agent is an one or any multiple mixture in dibutyl phthalate, dioctyl phthalate (DOP), the tributyl citrate, occupies 10～20% of airborne body gross weight; Tensio-active agent is any one or a multiple mixture in Yelkin TTS, trolamine, the sorbitan trioleate, occupies 1～10% of airborne body gross weight; Thixotropic agent is any one or a multiple mixture in hydrogenated castor oil, organobentonite, the colloid silica, occupies 1～20% of airborne body gross weight.Described additive is TiO
2Powder, granularity are 1～5 μ m.
Crystal silicon solar batteries with the above silver paste is made promptly makes solar panel front electrode and grid line with conductive silver paste through the silk screen printing sintering with above-described silver paste on cell substrates, obtain required solar cell.
Below in conjunction with non-limiting examples of the present invention and accompanying drawing, the present invention is described in further detail.Table 1 is the composition proportion of embodiment and the performance index of test, and table 2 is monocrystaline silicon solar cell electrical performance data that embodiment prepares.
Embodiment 1
Press the prescription batching 100g of embodiment 1 in the table 1, and mix, compound is put into corundum crucible, again with corundum crucible in the melting of electric furnace internal heating, smelting temperature is 1250 ℃, insulation 10min.The glass metal that melts is poured quenching-in water immediately into, and drying adopts the planetary ball mill method that glass frit is broken into powder, sieves, and particle diameter is at 0.5～5 μ m and following, obtains palladium powder.The SEM sem photograph of the glass powder that makes as shown in Figure 1, by among the figure proof obtained glass powder particle diameter in the following scope of desired 5 μ m.The softening temperature of this lead-free glass powder is 444 ℃, linear expansivity 90 * 10 after tested
-7℃
-1(seeing Table 1) reaches 560 ℃ with the softening temperature of the lead-free glass powder of addressing among the CN101215091A in the background technology and compares, and the softening temperature of the lead-free glass powder of present embodiment of the present invention significantly reduces, and its linear expansivity reaches service requirements.With prepared unleaded palladium powder, silver powder, organic carrier, the mixed conduction silver paste of additive, this conductive silver paste consists of described lead-free glass powder by weight percentage and accounts for 6% of silver paste gross weight, silver powder accounts for 80.9% of silver paste gross weight, organic carrier accounts for 13% of silver paste gross weight, and additive accounts for 0.1% of silver paste gross weight.Described organic carrier: adopt Terpineol 350 to occupy 60% of airborne body gross weight as organic solvent, ethyl cellulose is occupied 10% of airborne body gross weight as thickening material, Yelkin TTS occupies 5% of airborne body gross weight as tensio-active agent, dibutyl phthalate occupies 15% of airborne body gross weight as softening agent, and hydrogenated castor oil occupies 10% of airborne body gross weight as thixotropic agent; Described additive adopts TiO
2Powder, size range are 1～5 μ m.The conductive silver paste that makes is made solar panel front electrode and grid line through the silk screen printing sintering on cell substrates, obtain required solar cell.The strong adhesion of cell panel front electrode and grid line and monocrystalline silicon substrate behind silk screen printing, sintering is 14MPa after tested, and makes that silver-colored size distribution is more even.Be illustrated in figure 2 as the electrode shape appearance figure behind the sintering, can be found out by this figure: the monocrystaline silicon solar cell plate electrode is continuous, and is indeformable, do not play the limit.Its good conductivity, the side hinders 1.5m Ω/ after tested, and photoelectric transformation efficiency is 17.512%, and its electrical property sees Table 2, and performance index all are excellent.
Embodiment 2
Press the prescription batching 100g of embodiment 2 in the table 1, and mix, compound is put into corundum crucible, again with corundum crucible in the melting of electric furnace internal heating, smelting temperature is 1260 ℃, insulation 15min.The glass metal that melts is poured quenching-in water immediately into, and drying adopts the planetary ball mill method that glass frit is broken into powder, sieves, and particle diameter is at 0.5～5 μ m and following, obtains palladium powder.SEM sem photograph and Fig. 1 of the glass powder that makes are similar, and the Therefore, omited proves that obtained glass powder particle diameter is in the following scope of desired 5 μ m.The softening temperature of this lead-free glass powder is 458 ℃, linear expansivity 86 * 10 after tested
-7℃
-1(seeing Table 1) reaches 560 ℃ with the softening temperature of the lead-free glass powder of addressing among the CN101215091A in the background technology and compares, and the softening temperature of the lead-free glass powder of present embodiment of the present invention significantly reduces, and its linear expansivity reaches service requirements.With prepared unleaded palladium powder, silver powder, organic carrier, the mixed conductive silver paste that gets of additive, the weight percent of the contained component of this conductive silver paste consists of described lead-free glass powder and accounts for 5% of silver paste gross weight, silver powder accounts for 80.9% of silver paste gross weight, organic carrier accounts for 14% of silver paste gross weight, and additive accounts for 0.1% (additive with organic carrier prescription and embodiment 1 in identical) of silver paste gross weight.On cell substrates, the conductive silver paste that makes is made solar panel front electrode and grid line through the silk screen printing sintering, obtain required solar cell.The strong adhesion of this slurry battery sheet front electrode and grid line and monocrystalline silicon substrate behind silk screen printing, sintering after tested, be 13MPa, and make that silver-colored size distribution is more even, and can obtain equally as the electrode shape appearance figure behind the sintering shown in Figure 2 of embodiment 1, its monocrystaline silicon solar cell plate electrode is continuous, indeformable, do not play the limit, good conductivity, side's resistance 1.6m Ω/, photoelectric transformation efficiency is 17.683%, and electrical property sees Table 2.
Embodiment 3
Press the prescription batching 100g of embodiment 3 in the table 1, and mix, compound is put into corundum crucible, again with corundum crucible in the melting of electric furnace internal heating, smelting temperature is 1270 ℃, insulation 20min.The glass metal that melts is poured quenching-in water immediately into, and drying adopts the planetary ball mill method to be ground into powder, sieves, and particle diameter is at 0.5～5 μ m and following, obtains palladium powder.SEM sem photograph and Fig. 1 of the glass powder that makes are similar, and the Therefore, omited proves that obtained glass powder particle diameter is in the following scope of desired 5 μ m.The softening temperature of this lead-free glass powder is 473 ℃, linear expansivity 83 * 10 after tested
-7℃
-1(seeing Table 1).With glass powder, silver powder, the mixed conductive silver paste that gets of organic carrier, the weight percent of the contained component of this conductive silver paste consists of described lead-free glass powder and accounts for 4% of silver paste gross weight, silver powder accounts for 84.9% of silver paste gross weight, organic carrier accounts for 11% of silver paste gross weight, and additive accounts for 0.1% (additive with organic carrier prescription and embodiment 1 in identical) of silver paste gross weight.On cell substrates, the conductive silver paste that makes is made solar panel front electrode and grid line through the silk screen printing sintering, obtain required solar cell.After tested.The strong adhesion of this slurry battery sheet front electrode and grid line and monocrystalline silicon substrate behind silk screen printing, sintering, be 12MPa, and make that silver-colored size distribution is more even, and can obtain equally as the electrode shape appearance figure behind the sintering shown in Figure 2 of embodiment 1, its monocrystaline silicon solar cell plate electrode is continuous, indeformable, do not play the limit, good conductivity, side's resistance 1.7m Ω/, photoelectric transformation efficiency is 17.548%, and electrical property sees Table 2.
Embodiment 4
Press the prescription batching 100g of embodiment 4 in the table 1, and mix, compound is put into corundum crucible, again with corundum crucible in the melting of electric furnace internal heating, smelting temperature be 1280 ℃, is incubated 25min.The glass metal that melts is poured quenching-in water immediately into, and drying adopts the planetary ball mill method that glass frit is broken into powder, sieves, and particle diameter is at 0.5～5 μ m and following, obtains palladium powder.SEM sem photograph and Fig. 1 of the glass powder that makes are similar, and the Therefore, omited proves that obtained glass powder particle diameter is in the following scope of desired 5 μ m.The softening temperature of this lead-free glass powder is 485 ℃, linear expansivity 80 * 10 after tested
-7℃
-1(seeing Table 1).With glass powder, silver powder, the mixed conductive silver paste that gets of organic carrier, the weight percent of the contained component of this conductive silver paste consists of described lead-free glass powder and accounts for 3% of silver paste gross weight, silver powder accounts for 83.9% of silver paste gross weight, organic carrier accounts for 13% of silver paste gross weight, and additive accounts for 0.1% (additive with organic carrier prescription and embodiment 1 in identical) of silver paste gross weight.On cell substrates, the conductive silver paste that makes is made solar panel front electrode and grid line through the silk screen printing sintering, obtain required solar cell.After tested.The strong adhesion of this slurry battery sheet front electrode and grid line and monocrystalline silicon substrate behind silk screen printing, sintering, be 13MPa, and make that silver-colored size distribution is more even, and can obtain equally as the electrode shape appearance figure behind the sintering shown in Figure 2 of embodiment 1, its monocrystaline silicon solar cell plate electrode is continuous, indeformable, do not play the limit, good conductivity, side's resistance 1.6m Ω/, photoelectric transformation efficiency is 17.561%, and electrical property sees Table 2.
Embodiment 5
Press the prescription batching 100g of embodiment 5 in the table 1, and mix, compound is put into corundum crucible, again with corundum crucible in the melting of electric furnace internal heating, smelting temperature is 1300 ℃, insulation 30min.The glass metal that melts is poured quenching-in water immediately into, and drying adopts the planetary ball mill method that glass frit is broken into powder, sieves, and particle diameter is at 0.5～5 μ m and following, obtains palladium powder.SEM sem photograph and Fig. 1 of the glass powder that makes are similar, and the Therefore, omited proves that obtained glass powder particle diameter is in the following scope of desired 5 μ m.The softening temperature of this lead-free glass powder is 495 ℃, linear expansivity 75 * 10 after tested
-7℃
-1(seeing Table 1).With glass powder, silver powder, the mixed conductive silver paste that gets of organic carrier, the weight percent of the contained component of this conductive silver paste consists of described lead-free glass powder and accounts for 2% of silver paste gross weight, silver powder accounts for 84.9% of silver paste gross weight, organic carrier accounts for 13% of silver paste gross weight, and additive accounts for 0.1% (additive with organic carrier prescription and embodiment 1 in identical) of silver paste gross weight.On cell substrates, the conductive silver paste that makes is made solar panel front electrode and grid line through the silk screen printing sintering, obtain required solar cell.After tested.The strong adhesion of this slurry battery sheet front electrode and grid line and monocrystalline silicon substrate behind silk screen printing, sintering, be 15MPa, and make that silver-colored size distribution is more even, and can obtain equally as the electrode shape appearance figure behind the sintering shown in Figure 2 of embodiment 1, its monocrystaline silicon solar cell plate electrode is continuous, indeformable, do not play the limit, good conductivity, side's resistance 1.8m Ω/, photoelectric transformation efficiency is 17.673%, and electrical property sees Table 2.
The composition proportion of table 1 embodiment and the performance index of test
The monocrystaline silicon solar cell electrical property of table 2 embodiment preparation
Claims (10)
1. a lead-free glass powder is characterized in that its component comprises Bi
2O
3, ZnO, Al
2O
3, B
2O
3, SiO
2, BaO, each component weight percent content is SiO
220～30%, B
2O
32～15%, Bi
2O
340～70%, ZnO1～10%, Al
2O
31～10% and BaO1～5%.
2. lead-free glass powder according to claim 1 is characterized in that lead-free glass powder is that described component compound is 1100～1300 ℃ at smelting temperature, and insulation 10～30min founds and forms.
3. lead-free glass powder according to claim 2, the particle diameter that it is characterized in that described lead-free glass powder are that magnitude range is 0.5～5 μ m and following palladium powder.
4. the preparation method of glass powder according to claim 3, the particle diameter form that it is characterized in that described lead-free glass powder is random Polygons.
5. lead-free glass powder according to claim 2, the softening temperature that it is characterized in that described glass powder is 425～500 ℃, linear expansivity is 75～95 * 10
-7/ ℃.
6. crown glass powder, preparation method thereof may further comprise the steps:
(1) take by weighing each preparation of raw material compound by weight percentage, promptly this crown glass powder component comprises Bi
2O
3, ZnO, Al
2O
3, B
2O
3, SiO
2, BaO, its weight percent content is SiO
220～30%, B
2O
32～15%, Bi
2O
340～70%, ZnO 1～10%, Al
2O
31～10% and BaO 1～5%;
(2) compound is heated melting;
(3) with the glass metal shrend that melts;
(4) frit after the oven dry shrend;
(5) glass frit after will drying is broken into powder;
(6) sieve, the glass powder particle diameter is at 0.5～5 μ m and following palladium powder.
7. crown glass powder, preparation method thereof according to claim 6, it is characterized in that in the step (2) with the compound melting it being that compound is put into crucible, in the melting of electric furnace internal heating, preferably described crucible is a corundum crucible, described melting is that the heating smelting temperature is 1100～1300 ℃, insulation 10～30min.
8. crown glass powder, preparation method thereof according to claim 6, the shrend glass frit after it is characterized in that will drying in the step (5) are broken into powder and adopt the planetary ball mill method to pulverize.
9. one kind contains the silver paste that right requires one of 1-6 described lead-free glass powder, it is characterized in that it being with described lead-free glass powder and silver powder, additive and organic carrier preparation gained, preferably the weight percent of the contained component of silver paste consists of described lead-free glass powder and accounts for 1～10% of silver paste gross weight, silver powder accounts for 65～85% of silver paste gross weight, organic carrier accounts for 10～20% of silver paste gross weight, and additive accounts for 0.1～1% of silver paste gross weight.
10. crystal silicon solar batteries made from the described silver paste of claim, it is characterized in that on cell substrates, conductive silver paste being made solar panel front electrode and grid line through the silk screen printing sintering, obtain required solar cell with described silver paste.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010555333 CN102126829B (en) | 2010-11-23 | 2010-11-23 | Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste |
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|---|---|---|---|
| CN 201010555333 CN102126829B (en) | 2010-11-23 | 2010-11-23 | Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste |
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|---|---|
| CN102126829A true CN102126829A (en) | 2011-07-20 |
| CN102126829B CN102126829B (en) | 2013-07-03 |
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