CN106611625A - Low silver content efficient back passivation solar cell back silver paste - Google Patents
Low silver content efficient back passivation solar cell back silver paste Download PDFInfo
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- CN106611625A CN106611625A CN201510684140.XA CN201510684140A CN106611625A CN 106611625 A CN106611625 A CN 106611625A CN 201510684140 A CN201510684140 A CN 201510684140A CN 106611625 A CN106611625 A CN 106611625A
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Abstract
The invention discloses a low silver content efficient back passivation solar cell back silver paste which is composed of mixed conductive silver powder, glass powder, an organic carrier and an additive, wherein the mixed conductive silver powder is formed by mixing nano silver powder and dendritic micron silver powder. The back silver paste is specifically designed for a back passivation cell, and has the advantages of high efficiency, low silver content, wide sintering window and so on.
Description
Technical field
The present invention relates to a kind of carry on the back the electrode production raw material that passivation cell is used, more particularly to a kind of low silver content efficiently carries on the back passivation back silver paste of solar cell.
Background technology
With the development of crystal silicon solar energy battery technology, passivating technique is carried on the back（PERC）Increasingly produced house by each production to be paid close attention to, and in crystal silicon solar energy battery production, for lifting the photoelectric transformation efficiency of crystal silicon solar cell sheet.At present using the crystal silicon solar cell sheet of back of the body passivating technique technique productions than crystal silicon solar cell sheet efficiency high 3-4% that common process is produced or so, and this technology is constantly improved and improved, with the development of this art, the end of the year in 2016, carry on the back the common process that passivating technique was expected to replace in crystal silicon solar cell sheet is produced comprehensively before.
Although back of the body passivating technique at home produce housies technology is molded and starts to put into production by the production of many crystal silicon solar cell sheets, corresponding domestic back of the body passivation solar energy electronic slurry compares shortage.Back of the body passivation solar energy positive silver paste is big due to technical difficulty, technology innovation is regenerated too fast, domestic none enterprise's break-through skill threshold, and carry on the back the domestic also only scholar Xing Yijia enterprise of passivation solar energy aluminium paste and define mass production, also only several enterprises can form small lot buying to back of the body passivation solar energy back silver paste, and technically also have very big room for promotion.And the domestic back of the body for producing family's production is passivated the shortcomings of high raw materials for production cost of back silver paste generally existing silver content is expensive, and sintering window is narrow, process matching is harsher, printing-sintering behind efficiency is not high.
The content of the invention
It is an object of the invention to provide a kind of low silver content efficiently carries on the back passivation back silver paste of solar cell, the mass percent of its each component is：Hybrid conductive silver powder accounts for 40-65%, and glass dust accounts for 0.5-6%, and organic carrier accounts for 30-50%, and additive accounts for 0-4%.
The hybrid conductive silver powder is made up of 0.1-10.0% nano-silver powders and 90.0-99.9% dendritic micron silver powders.
The nano-silver powder its average grain diameter is 50-800 nanometers, preferably 80 nanometers.
The glass dust is made up of component glass dust 1 and the body of component glass dust 2, and its ratio is 2:1 to 6:1.
The component glass dust 1 is bismuth-silicon-lead-boron-zinc-tellurium system, and the system and percentage by weight are：Bi2O3 10-65%；SiO2 1-30%；PbO 0-55%；B2O3 0-20%；ZnO 0-25%；TeO2 0-20%, glass dust softening temperature be 550-850 degree, preferably 600 degree.
The component glass dust 2 is aluminium-silicon-boron-zinc system, and the system and percentage by weight are：Al2O3 5-30%；SiO2 1-25%；B2O3 20-80%；ZnO 0-30%, glass dust softening temperature be 350-650 degree, preferably 500 degree.
It is 0-4% that the additive accounts for the mass percent of silver paste, and additive can be element Zn, Ti, Mg, Ag, Mn, Sb, Bi, Pb, Ba, Pt, Ca, Sn, Zr, V, P, Ta, Si, Al, B, the organic compound or organic complex of one or more mixing of the oxide, or above-mentioned element of one or more mixing therein of Cu, or the combination of the organic compound of these elements and organic complex.
Compared with prior art, beneficial effects of the present invention are：Back side silver paste is prepared using hybrid conductive silver powder, silver content is reduced, production cost is reduced, while have efficiency high, the advantages of sintering window width.
Specific embodiment
With reference to embodiment, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Example 1
It is 500 degree glass dust 2 that Bi2O3, SiO2, PbO, B2O3, ZnO, TeO2, Al2O3 are mixed to get respectively glass dust 1 that softening temperature is 600 degree with softening temperature in raw material shown in table 1 and ratio, will both with 2:1 ratio mixing.
In raw material shown in table 2 and ratio dendritic micron silver powder, nano-silver powder, glass dust, organic carrier, additives mixed adjustment are prepared low silver content and efficiently carry on the back passivation back silver paste of solar cell.
Embodiment 2 ~ 3
Using raw material and ratio shown in table 1-2, according to the preparation method of embodiment 1, prepare low silver content and efficiently carry on the back passivation back silver paste of solar cell.
Performance pair is carried out on monocrystalline silicon piece to the back silver paste used for solar batteries prepared by the embodiment of the present invention 1 ~ 3
It is more as shown in table 3 than test performance result：
Table 1-3 is the raw material and efficiency used by present example 1-3
（1）Glass dust is filled a prescription：
（2）Entire slurry is filled a prescription
（3）Adhesive force and back of the body passivation silicon chip efficiency
The present invention is not limited to above-mentioned preferred forms; anyone can draw the product of various other forms under the enlightenment of the present invention; however, make any change in its shape or structure, and it is every with technical scheme identical or similar to the present application, it is within the scope of the present invention.
Claims (7)
1. a kind of low silver content efficiently carries on the back passivation back silver paste of solar cell, it is characterised in that：The mass percent of each component is：Hybrid conductive silver powder accounts for 40-65%, and glass dust accounts for 0.5-6%, and organic carrier accounts for 30-50%, and additive accounts for 0-4%.
2. a kind of low silver content according to claim 1 efficiently carries on the back passivation back silver paste of solar cell, it is characterised in that the hybrid conductive silver powder is made up of 0.1-10.0% nano-silver powders and 90.0-99.9% dendritic micron silver powders.
3. a kind of low silver content according to claim 1 efficiently carries on the back passivation back silver paste of solar cell, it is characterised in that the nano-silver powder its average grain diameter is 50-800 nanometers, preferably 80 nanometers.
4. a kind of low silver content according to claim 1 efficiently carries on the back passivation back silver paste of solar cell, it is characterised in that the glass dust is made up of component glass dust 1 and the body of component glass dust 2, and its ratio is 2:1 to 6:1.
5. a kind of low silver content according to claim 1 efficiently carries on the back passivation back silver paste of solar cell, it is characterised in that the component glass dust 1 is bismuth-silicon-lead-boron-zinc-tellurium system, and the system and percentage by weight are：Bi2O3 10-65%；SiO2 1-30%；PbO 0-55%；B2O3 0-20%；ZnO 0-25%；TeO2 0-20%, glass dust softening temperature be 550-850 degree, preferably 600 degree.
6. a kind of low silver content according to claim 1 efficiently carries on the back passivation back silver paste of solar cell, it is characterised in that the component glass dust 2 is aluminium-silicon-boron-zinc system, and the system and percentage by weight are：Al2O3 5-30%；SiO2 1-25%；B2O3 20-80%；ZnO 0-30%, glass dust softening temperature be 350-650 degree, preferably 500 degree.
7. a kind of low silver content according to claim 1 efficiently carries on the back passivation back silver paste of solar cell, it is characterised in that the additive can be element Zn, Ti, Mg, Ag, Mn, Sb, Bi, Pb, Ba, Pt, Ca, Sn, Zr, V, P, Ta, Si, Al, the organic compound or organic complex of one or more mixing of the oxide, or above-mentioned element of one or more mixing therein of B, Cu, or the combination of the organic compound of these elements and organic complex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510684140.XA CN106611625A (en) | 2015-10-21 | 2015-10-21 | Low silver content efficient back passivation solar cell back silver paste |
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| CN201510684140.XA CN106611625A (en) | 2015-10-21 | 2015-10-21 | Low silver content efficient back passivation solar cell back silver paste |
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| CN106611625A true CN106611625A (en) | 2017-05-03 |
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| CN201510684140.XA Pending CN106611625A (en) | 2015-10-21 | 2015-10-21 | Low silver content efficient back passivation solar cell back silver paste |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020006797A1 (en) * | 2018-07-06 | 2020-01-09 | 南通天盛新能源股份有限公司 | All-aluminum back-field back silver paste and preparation method therefor and use thereof |
| CN111533458A (en) * | 2020-05-11 | 2020-08-14 | 湖北格纳斯新材料有限公司 | Preparation method of environment-friendly glass powder for photovoltaic solar electronic paste |
| CN111863309A (en) * | 2020-08-26 | 2020-10-30 | 南通天盛新能源股份有限公司 | High-tension main grid silver paste applied to N-type solar cell and preparation method thereof |
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| CN101615637A (en) * | 2009-07-08 | 2009-12-30 | 西安交通大学苏州研究院 | Electrode of solar battery forms with slurry and preparation method thereof |
| CN102640231A (en) * | 2009-11-25 | 2012-08-15 | E·I·内穆尔杜邦公司 | Process for the formation of a silver back electrode of a passivated emitter and rear contact silicon solar cell |
| CN103000252A (en) * | 2012-11-10 | 2013-03-27 | 江苏瑞德新能源科技有限公司 | Solar cell silver-backed slurry ultralow in silver content |
| US20150060742A1 (en) * | 2013-09-03 | 2015-03-05 | E I Du Pont De Nemours And Company | Conductive paste used for a solar cell electrode |
| CN104700923A (en) * | 2013-12-10 | 2015-06-10 | 湖南利德电子浆料有限公司 | Solar cell back sliver paste with high photoelectric conversion efficiency and production method thereof |
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- 2015-10-21 CN CN201510684140.XA patent/CN106611625A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101615637A (en) * | 2009-07-08 | 2009-12-30 | 西安交通大学苏州研究院 | Electrode of solar battery forms with slurry and preparation method thereof |
| CN102640231A (en) * | 2009-11-25 | 2012-08-15 | E·I·内穆尔杜邦公司 | Process for the formation of a silver back electrode of a passivated emitter and rear contact silicon solar cell |
| CN103000252A (en) * | 2012-11-10 | 2013-03-27 | 江苏瑞德新能源科技有限公司 | Solar cell silver-backed slurry ultralow in silver content |
| US20150060742A1 (en) * | 2013-09-03 | 2015-03-05 | E I Du Pont De Nemours And Company | Conductive paste used for a solar cell electrode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020006797A1 (en) * | 2018-07-06 | 2020-01-09 | 南通天盛新能源股份有限公司 | All-aluminum back-field back silver paste and preparation method therefor and use thereof |
| CN111533458A (en) * | 2020-05-11 | 2020-08-14 | 湖北格纳斯新材料有限公司 | Preparation method of environment-friendly glass powder for photovoltaic solar electronic paste |
| CN111863309A (en) * | 2020-08-26 | 2020-10-30 | 南通天盛新能源股份有限公司 | High-tension main grid silver paste applied to N-type solar cell and preparation method thereof |
| CN111863309B (en) * | 2020-08-26 | 2021-10-08 | 南通天盛新能源股份有限公司 | High-tension main grid silver paste applied to N-type solar cell and preparation method thereof |
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