CN102643615A - Inorganic adhesive for aluminum pulp of crystalline silicon solar cell and preparation method thereof - Google Patents
Inorganic adhesive for aluminum pulp of crystalline silicon solar cell and preparation method thereof Download PDFInfo
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- CN102643615A CN102643615A CN2012101186278A CN201210118627A CN102643615A CN 102643615 A CN102643615 A CN 102643615A CN 2012101186278 A CN2012101186278 A CN 2012101186278A CN 201210118627 A CN201210118627 A CN 201210118627A CN 102643615 A CN102643615 A CN 102643615A
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Abstract
The invention discloses an inorganic adhesive for an aluminum pulp of a silicon solar cell and a preparation method of the inorganic adhesive. The inorganic adhesive comprises the following components by mass percent: 50-60% of Bi2O3, 3-5% of B2O3, 5-9% of SiO2, 3-10% of Al2O3, 8-15% of Sb2O3, 10-30% of ZnO, and 1-10% of Ga, wherein the total mass percent of the components in 100%. The crystalline silicon solar aluminum pulp prepared by the inorganic adhesive has lower glass powder softening point and good adhesion property during sintering; and after sintering, the expansion coefficient is small, the cell sheet is small in bending, and the cell is high in electrical property.
Description
Technical field
The present invention relates to crystal silicon solar energy battery and use the aluminium paste field, particularly relate to a kind of crystal silicon solar energy battery inorganic adhesive for aluminum paste and preparation method thereof.
Background technology
In the preparation process of crystal silicon solar energy battery, aluminium paste is printed on the silicon chip back side, form the aluminum back electric field electrode through oversintering at the back side of solar cell silicon wafer, have the effect that reduces contact resistance and improve the cell photoelectric efficiency of conversion.
Aluminium paste mainly is grouped into by one-tenth such as aluminium powder, organic binder bond, inorganic adhesives.Wherein aluminium powder is a conductive phase, behind sintering, forms good Ohmic contact with silicon chip; Wherein organic binder bond is as a kind of carrier; Make the pressed powder uniform distribution of easy reunions such as the aluminium powder in the aluminium paste, mineral binder bond under the stored condition; Keep suspended state, make the aluminium paste slurry evenly coat the silicon chip back side during printing, after the drying aluminium powder and mineral binder bond are attached on the silicon chip and do not come off; Vapor away fully behind the sintering, it is bonding with aluminium film and silicon substrate to leave over inorganic adhesive; Wherein inorganic adhesive is a glass powder; Softening and formation molten glass layers is bonded together aluminium film and silicon substrate under sintering temperature, requires the softening temperature of glass powder lower; The abundant wetting aluminium powder of low softening point glass powder ability; Make and form closely contact between aluminum particle, the contact resistance between reduction and the silicon chip forms good Ohmic contact.
The make the science and technology prosperous Chinese patent of development corporation, Ltd. application of applicant Wuxi city scholar, publication number is CN101555388A, its invention has related to a kind of inorganic adhesive for aluminum paste of silicon solar cells and preparation method thereof.Wherein, oxide compound B
2O
3Content is that 15-30% is too high, makes the stability of glass system receive destruction; Bi
2B
3Content is that 15-35% is low excessively, processes after glass part is applied to aluminium paste moistening bad to aluminium powder.In use, be difficult to satisfy of the request for utilization of solar cell aluminium paste, therefore demand urgently its composition and content are improved for inorganic adhesive.
Summary of the invention
The present invention provides a kind of crystal silicon solar energy battery inorganic adhesive for aluminum paste; This inorganic adhesive softening temperature under lead-free condition is also lower, can be lower than 550 ℃, under sintering temperature, can soften rapidly and levelling; Wetting aluminium powder form; Behind sintering, aluminum back electric field electrode and silicon chip have good Ohmic contact with the aluminium paste of this inorganic adhesive preparation, and aluminium electrode layer and cell silicon chip sticking power are good; The coefficient of expansion of the molten glass layers that forms behind this inorganic adhesive sintering is less, and the battery bending tablet is little.
For realizing above-mentioned purpose, the technical scheme that the present invention adopted is: a kind of crystal silicon solar energy battery aluminium paste is used mineral binder bond, is characterized in, said electrodeless sticker consists of by mass percentage:
Bi
2O
3：50-60％； B
2O
3：3-5％； SiO
2：5-9％；
Al
2O
3：3-10％； Sb
2O
3：8-15％； ZnO：10-30％；
Ga:1-10%; Add up to: 100%.
The effect of above-mentioned each component in mineral binder bond is respectively:
Bi
2O
3, in glass, replace lead, reduce the softening temperature and the viscosity of glass.
B
2O
3, the thermal expansivity of reduction glass, the thermostability of raising glass also is good fusing assistant, can impel the glass smelting process to quicken;
SiO
2, be the main body composition of inorganic adhesive, form irregular contiguous network with the structure constituent element of silicon-oxy tetrahedron;
Al
2O
3, belonging to intermediate oxide, it act as chemicalstability, the thermostability that improves glass, alleviates the erosion of glass to refractory materials;
ZnO, intermediate oxide, as network modifying oxide, it act as the thermal expansivity that reduces glass, improves the chemicalstability and the thermostability of glass;
Sb
2O
3, intermediate oxide, alkalescence is better than acidity, regulates the acid of glass;
Ga belongs to functional element, increases the wetting ability of glass metal, reduces the sial contact, forms good Ohmic contact.
The present invention also provides a kind of preparation method of aforesaid crystal silicon solar energy battery inorganic adhesive for aluminum paste, comprises the steps:
A) component of said inorganic adhesive is mixed after good according to the proportioning weighing;
B) mixed inorganic adhesive is placed low temperature oven, under 200 ℃ of-300 ℃ of temperature preheating 1-2 hour, put into High Temperature Furnaces Heating Apparatus then, under 800 ℃ of-1350 ℃ of temperature melting 1-2 hour;
C) with after the inorganic adhesive de-ionized shrend after the melting, to 6um, drying obtains the inorganic adhesive finished product then with the ball mill ball milling.
Further, said component with said inorganic adhesive mixes after good according to the proportioning weighing and adopts the V-arrangement mixer to mix.
Further, said ball mill is a planetary ball mill.
Compared with prior art, the invention has the beneficial effects as follows:
1, the glass melt temperature is low, good fluidity, glass system resistance to overturning, high conformity.
2, the Bi that adds higher proportion in the component
2O
3, the glass melting temperature is reduced, viscosity reduces, and softening temperature reduces.
3, introduce a certain proportion of Ga in the glass, increase the wetting ability of glass metal, it is good to process behind the aluminium paste wettability to the silicon chip matrix, and contains the rare metal gallium in the glass, reduces the contact resistance between silicon and the aluminium, forms good Ohmic contact.
The softening temperature of glass powder is lower during with the crystal silicon solar aluminium paste sintering of inorganic adhesive of the present invention preparation, and cohesiveness is good, and sintering after coefficient is less, and the battery bending tablet is little, and battery electrical property is high.
Description of drawings
Fig. 1 is the preparation flow figure of mineral binder bond according to the invention.
Embodiment
Embodiment 1
A kind of component of crystal silicon solar energy battery inorganic adhesive for aluminum paste is: by mass percentage: Bi
2O
357%, B
2O
33%, Al
2O
33%, SiO
25%, ZnO 14%, Sb
2O
312%, Ga5%.
A kind of preparation method of aforesaid crystal silicon solar energy battery inorganic adhesive for aluminum paste, as shown in Figure 1, mix in the component input V-arrangement mixer with said inorganic adhesive; Pack in 95 porcelain crucibles, place 200 ℃ of preheatings of box low temperature oven after 2 hours, put into box High Temperature Furnaces Heating Apparatus; 1300 ℃ of meltings 1 hour are dried after the shrend, with the planetary ball mill ball milling to 6um; Oven dry obtains the inorganic adhesive for aluminum paste of silicon solar cells finished product, and it is a lead-free glass powder.
With the above-mentioned mineral binder bond for preparing, according to the mass percent aluminium powder: 75%, mineral binder bond: 2%, organic carrier: 23% mixes and stirs all usefulness, grinds with three-roll grinder and disperses, and obtains the crystal silicon solar energy battery aluminium paste.
Embodiment 2
A kind of component of crystal silicon solar energy battery inorganic adhesive for aluminum paste is: by mass percentage: Bi
2O
356%, B
2O
34%, Al
2O
33%, SiO
25%, ZnO 14%, Sb
2O
312%, Ga5%.
Its preparation method is identical with embodiment 1.
Embodiment 3
A kind of component of crystal silicon solar energy battery inorganic adhesive for aluminum paste is: by mass percentage: Bi
2O
356%, B
2O
35%, Al
2O
35%, SiO
23%, ZnO 10%, Sb
2O
315%, Ga5%.
Its preparation method is identical with embodiment 1.
Embodiment 4
A kind of component of crystal silicon solar energy battery inorganic adhesive for aluminum paste is: by mass percentage: Bi
2O
359%, B
2O
35%, Al
2O
34%, SiO
24%, ZnO 15%, Sb
2O
312%, Ga1%.
Its preparation method is identical with embodiment 1.
With the inorganic adhesive of embodiment 1～4 gained according to 2 parts of mass parts, 75 parts of aluminium powders, organic carrier is prepared into aluminium paste for 23 parts, is applied to the solar cell slice assembly line respectively, 1000 silicon chips statistics, battery performance is as shown in the table:
The test result analysis of table 1 embodiment 1～4
When wherein 17% ratio was meant battery testing, electrically efficient was greater than the ratio more than 17%.
In sum, the aluminium paste with mineral binder bond preparation of the present invention is applied to solar cell, and its stripping strength is good, and the silicon warp degree is little, and ohm contact performance is good, and the battery comprehensive electrochemical properties is high;
The content that the foregoing description is illustrated is to be understood that to these embodiment and only is used to be illustrated more clearly in the present invention; And be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Claims (4)
1. a crystal silicon solar energy battery aluminium paste is used mineral binder bond, it is characterized in that, said electrodeless sticker consists of by mass percentage:
Bi
2O
3：50-60％； B
2O
3：3-5％； ?SiO
2：5-9％；
Al
20
3：3-10％； Sb
2O
3：8-15％； ZnO：10-30％；
Ga:1-10%; Add up to: 100%.
2. the preparation method of a crystal silicon solar energy battery inorganic adhesive for aluminum paste as claimed in claim 1 is characterized in that, comprises the steps:
A) component of said inorganic adhesive is mixed after good according to the proportioning weighing;
B) mixed inorganic adhesive is placed low temperature oven, under 200 ℃ of-300 ℃ of temperature preheating 1-2 hour, put into High Temperature Furnaces Heating Apparatus then, under 800 ℃ of-1350 ℃ of temperature melting 1-2 hour;
C) with after the inorganic adhesive de-ionized shrend after the melting, to 6um, drying obtains the inorganic adhesive finished product then with the ball mill ball milling.
3. the preparation method of crystal silicon solar energy battery inorganic adhesive for aluminum paste according to claim 2 is characterized in that, said component with said inorganic adhesive mixes after good according to the proportioning weighing and adopts the V-arrangement mixer to mix.
4. the preparation method of crystal silicon solar energy battery inorganic adhesive for aluminum paste according to claim 2 is characterized in that, said ball mill is a planetary ball mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101186278A CN102643615A (en) | 2012-04-21 | 2012-04-21 | Inorganic adhesive for aluminum pulp of crystalline silicon solar cell and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101186278A CN102643615A (en) | 2012-04-21 | 2012-04-21 | Inorganic adhesive for aluminum pulp of crystalline silicon solar cell and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102643615A true CN102643615A (en) | 2012-08-22 |
Family
ID=46656699
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101186278A Pending CN102643615A (en) | 2012-04-21 | 2012-04-21 | Inorganic adhesive for aluminum pulp of crystalline silicon solar cell and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004454A (en) * | 2013-02-21 | 2014-08-27 | 西北稀有金属材料研究院 | Method for preparing inorganic binding material and inorganic binding material obtained through preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090101872A1 (en) * | 2007-10-18 | 2009-04-23 | E.I. Du Pont De Nemours And Company | LEAD-FREE CONDUCTIVE COMPOSITIONS AND PROCESSES FOR USE IN THE MANUFACTURE OF SEMICONDUCTOR DEVICES: Mg-CONTAINING ADDITIVE |
| CN102229469A (en) * | 2011-07-20 | 2011-11-02 | 珠海彩珠实业有限公司 | Lead-free glass powder for aluminum paste of silicon solar cell and preparation method thereof |
| CN102254587A (en) * | 2011-05-17 | 2011-11-23 | 陈晓东 | Sizing agent for Al-BSF (Al-back surface field) of silicon solar cell and preparation method thereof |
-
2012
- 2012-04-21 CN CN2012101186278A patent/CN102643615A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090101872A1 (en) * | 2007-10-18 | 2009-04-23 | E.I. Du Pont De Nemours And Company | LEAD-FREE CONDUCTIVE COMPOSITIONS AND PROCESSES FOR USE IN THE MANUFACTURE OF SEMICONDUCTOR DEVICES: Mg-CONTAINING ADDITIVE |
| CN102254587A (en) * | 2011-05-17 | 2011-11-23 | 陈晓东 | Sizing agent for Al-BSF (Al-back surface field) of silicon solar cell and preparation method thereof |
| CN102229469A (en) * | 2011-07-20 | 2011-11-02 | 珠海彩珠实业有限公司 | Lead-free glass powder for aluminum paste of silicon solar cell and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004454A (en) * | 2013-02-21 | 2014-08-27 | 西北稀有金属材料研究院 | Method for preparing inorganic binding material and inorganic binding material obtained through preparation method |
| CN104004454B (en) * | 2013-02-21 | 2015-11-25 | 西北稀有金属材料研究院 | A kind of preparation method of inorganic cementitious material and the inorganic cementitious material obtained thus |
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Application publication date: 20120822 |