CN102831948A - Efficient crystalline silicon solar battery front side silver paste and preparation method thereof - Google Patents
Efficient crystalline silicon solar battery front side silver paste and preparation method thereof Download PDFInfo
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- CN102831948A CN102831948A CN2012102388987A CN201210238898A CN102831948A CN 102831948 A CN102831948 A CN 102831948A CN 2012102388987 A CN2012102388987 A CN 2012102388987A CN 201210238898 A CN201210238898 A CN 201210238898A CN 102831948 A CN102831948 A CN 102831948A
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- front side
- silicon solar
- silver paste
- solar cell
- crystal silicon
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Abstract
The invention provides an efficient crystalline silicon solar battery front side silver paste which is prepared by adding glass powder into the silver paste, wherein the glass powder is prepared from the following ingredients in weight percentage: 0-90% of Bi203, 0-30% of B203, 0-50% of SiO2, 0-20% of Al203 and 0-20% of ZnO. The efficient crystalline silicon solar battery front side silver paste provided by the invention has a wider process window, has excellent ohmic contact and at the same time has a high short-circuit current, so that the conversion efficiency is high, the stability is good and the cost performance is high.
Description
Technical field
The invention belongs to technical field of solar batteries, specifically is a kind of high-efficiency crystal silicon solar cell front side silver paste and preparation method thereof.
Background technology
Present common crystal-silicon solar cell manufacturing process is seven big steps, 1. removes the silicon chip surface affected layer; 2. formation suede structure; 3. diffuse to form PN junction; 4. removal phosphorosilicate glass; 5. deposition antireflective film; 6. the positive backplate of silk screen printing; 7. sintering forms ohmic contact.The crystal silicon battery that this flow process is made, its conversion efficiency receives the restriction of its structure and physical mechanism, and its monocrystalline conversion efficiency is difficult to surpass 18.0%.To P type silicon chip, during the system PN junction, the low concentration surface doping can reduce the compound probability of minority carrier, improves the short circuit current of battery; But the doping of low concentration brings difficulty for follow-up metallization ohmic contact, and concentration is low more, and series resistance is big more, can reduce the open circuit voltage of battery.The ordinary silicon battery is considered the needs of doping content and ohmic contact, and square resistance has limited the raising of battery efficiency about 50 Ω/mouths.
For addressing the above problem, mentioned the manufacturing approach of selective emitter (Selective Emitter) solar cell in the lot of documents, be representative wherein with the disclosed a kind of technology of selective emitter solar battery cheaply of patent CN101101936.But when preparation SE structure battery, its manufacturing process flow is comparatively complicated, and cost is higher.
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Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of high-efficiency crystal silicon solar cell front side silver paste and preparation method thereof.
A kind of high-efficiency crystal silicon solar cell front side silver paste adds glass dust in said silver slurry, it is characterized in that said glass dust processed by following raw materials by weight percent: Bi
2O
30-90%, B
2O
30-30%, SiO
20-50%, Al
2O
30-20%, ZnO 0-20%.
Described a kind of high-efficiency crystal silicon solar cell front side silver paste is characterized in that said glass dust processed by following raw materials by weight percent: Bi
2O
340-65%, B
2O
35-10%, SiO
210-30%, Al
2O
35-15%, ZnO 5-10%.
Described a kind of high-efficiency crystal silicon solar cell front side silver paste, the particle diameter that it is characterized in that said glass dust are 1-20 μ m, preferred 1-15 μ m.
Described a kind of high-efficiency crystal silicon solar cell front side silver paste is characterized in that it is 1%-8% that said glass dust accounts for the silver-colored percentage by weight of starching.
Described a kind of high-efficiency crystal silicon solar cell front side silver paste is characterized in that it is 3%-5% that said glass dust accounts for the silver-colored percentage by weight of starching.
The preparation method of described a kind of high-efficiency crystal silicon solar cell front side silver paste is characterized in that comprising the steps:
1) takes by weighing each raw material by weight ratio;
2) each raw material is fully mixed, is positioned over corundum crucible, build crucible cover, 180 ℃-220 ℃ following preheating half an hour, 1100 ℃-1400 ℃ down fusing pour the room temperature pure water into after 1 hour, be solidified into cullet;
3) above-mentioned cullet are carried out ball milling, sieve, dry, form glass powder, add glass dust and in silver powder, process the high-efficiency crystal silicon solar cell front side silver paste.
Described method is characterized in that step 2) described in preheat temperature be 200 ℃, said fusion temperature is 1200 ℃-1300 ℃.
A kind of high-efficiency crystal silicon solar cell front side silver paste of the present invention has the process window of broad, when having excellent ohmic contact, have high short circuit current, thereby it has high conversion efficiency, good stability, and cost performance is high.
Embodiment
Embodiment 1
A kind of preparation method of high-efficiency crystal silicon solar cell front side silver paste, concrete grammar is:
1. take by weighing five kinds of oxides, its concrete percentage by weight is 60%Bi
2O
3, 5%B
2O
3, 20% SiO
2, 10%Al
2O
3, 5%ZnO.
2. the above-mentioned oxide that takes by weighing is fully mixed again, is positioned over corundum crucible, build crucible cover, after 200 ℃ of following preheating half an hour, 1300 ℃ down fusing pour the room temperature pure water into after 1 hour, be solidified into cullet.
3. above-mentioned cullet are carried out ball milling again, sieve, dry, form the glass powder of 10-15 μ m.Add the above-mentioned glass dust of 3% percentage by weight and in silver powder, process the high-efficiency crystal silicon solar cell front side silver paste.
Through experiment; Silver that embodiment 1 prepares slurry is that its average light photoelectric transformation efficiency is 18.2% on the monocrystalline silicon battery of 12.5cm in the length of side; Short circuit current is 5.68A; Open circuit voltage is 0.632V, and fill factor, curve factor is 78.5%, and the photoelectric conversion efficiency of starching with FERRO-3116 model silver than ordinary production has improved 0.2 percentage point.
Embodiment 2
A kind of preparation method of high-efficiency crystal silicon solar cell front side silver paste, concrete grammar is:
1. take by weighing five kinds of oxides, its concrete percentage by weight is 65%Bi
2O
3, 5%B
2O
3, 10% SiO
2, 10%Al
2O
3, 10%ZnO.
2. the above-mentioned oxide that takes by weighing is fully mixed again, is positioned over corundum crucible, build crucible cover, after 200 ℃ of following preheating half an hour, 1200 ℃ down fusing pour the room temperature pure water into after 1 hour, be solidified into cullet.
3. above-mentioned cullet are carried out ball milling again, sieve, dry, form the glass powder of 5-10 μ m.Add the above-mentioned glass dust of 4% percentage by weight and in silver powder, process the high-efficiency crystal silicon solar cell front side silver paste.
Through experiment; Silver that embodiment 2 prepares slurry is that its average light photoelectric transformation efficiency is 18.3% on the monocrystalline silicon battery of 12.5cm in the length of side; Short circuit current is 5.72A; Open circuit voltage is 0.632V, and fill factor, curve factor is 78.5%, has improved 0.3 percentage point than ordinary production with FERRO-3116 model silver slurry efficient.
Embodiment 3
A kind of preparation method of high-efficiency crystal silicon solar cell front side silver paste, concrete grammar is:
1. take by weighing five kinds of oxides, its concrete percentage by weight is 40%Bi
2O
3, 10%B
2O
3, 30% SiO
2, 10%Al
2O
3, 10%ZnO.
2. the above-mentioned oxide that takes by weighing is fully mixed again, is positioned over corundum crucible, build crucible cover, after 200 ℃ of following preheating half an hour, 1300 ℃ down fusing pour the room temperature pure water into after 1 hour, be solidified into cullet.
3. above-mentioned glass is carried out ball milling again, sieves, dries, form the glass powder of 1-5 μ m.Add the above-mentioned glass dust of 5% percentage by weight and in silver powder, process the crystal silicon solar energy battery front side silver paste.
Through experiment; Silver that embodiment 3 prepares slurry is that its average light photoelectric transformation efficiency is 18.25% on the monocrystalline silicon battery of 12.5cm in the length of side; Short circuit current is 5.73A; Open circuit voltage is 0.633V, and fill factor, curve factor is 78.0%, has improved 0.25 percentage point than ordinary production with FERRO-3116 model silver slurry efficient.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all is included within protection scope of the present invention.
Claims (7)
1. high-efficiency crystal silicon solar cell front side silver paste adds glass dust in said silver slurry, it is characterized in that said glass dust processed by following raw materials by weight percent: Bi
2O
30-90%, B
2O
30-30%, SiO
20-50%, Al
2O
30-20%, ZnO 0-20%.
2. a kind of high-efficiency crystal silicon solar cell front side silver paste as claimed in claim 1 is characterized in that said glass dust processed by following raw materials by weight percent: Bi
2O
340-65%, B
2O
35-10%, SiO
210-30%, Al
2O
35-15%, ZnO 5-10%.
3. a kind of high-efficiency crystal silicon solar cell front side silver paste as claimed in claim 1, the particle diameter that it is characterized in that said glass dust are 1-20 μ m, preferred 1-15 μ m.
4. a kind of high-efficiency crystal silicon solar cell front side silver paste as claimed in claim 1 is characterized in that it is 1%-8% that said glass dust accounts for the silver-colored percentage by weight of starching.
5. a kind of high-efficiency crystal silicon solar cell front side silver paste as claimed in claim 1 is characterized in that it is 3%-5% that said glass dust accounts for the silver-colored percentage by weight of starching.
6. like the preparation method of any described a kind of high-efficiency crystal silicon solar cell front side silver paste in the claim 1 to 5, it is characterized in that comprising the steps:
1) takes by weighing each raw material by weight ratio;
2) each raw material is fully mixed, is positioned over corundum crucible, build crucible cover, 180 ℃-220 ℃ following preheating half an hour, 1100 ℃-1400 ℃ down fusing pour the room temperature pure water into after 1 hour, be solidified into cullet;
3) above-mentioned cullet are carried out ball milling, sieve, dry, form glass powder, add glass dust and in silver powder, process the high-efficiency crystal silicon solar cell front side silver paste.
7. method as claimed in claim 6 is characterized in that step 2) described in preheat temperature be 200 ℃, said fusion temperature is 1200 ℃-1300 ℃.
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| CN2012102388987A CN102831948A (en) | 2012-07-11 | 2012-07-11 | Efficient crystalline silicon solar battery front side silver paste and preparation method thereof |
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| CN2012102388987A CN102831948A (en) | 2012-07-11 | 2012-07-11 | Efficient crystalline silicon solar battery front side silver paste and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502926A (en) * | 2015-12-11 | 2016-04-20 | 贵州佰博新材料科技有限公司 | Semiconductor surface passivation lead-free glass powder and preparing method thereof |
| CN108083650A (en) * | 2017-12-26 | 2018-05-29 | 中建材蚌埠玻璃工业设计研究院有限公司 | Crystal silicon solar batteries front side silver paste glass dust and preparation method thereof |
| CN110033875A (en) * | 2019-05-16 | 2019-07-19 | 应炎冲 | A kind of preparation method of crystal silicon photovoltaic cell front electrode silver slurry |
| CN110033876A (en) * | 2019-05-16 | 2019-07-19 | 应炎冲 | A kind of crystal silicon photovoltaic cell aluminum slurry material and preparation method |
| CN114334216A (en) * | 2022-03-07 | 2022-04-12 | 西安宏星电子浆料科技股份有限公司 | Thick film conductor paste |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05225822A (en) * | 1992-02-07 | 1993-09-03 | Tanaka Kikinzoku Kogyo Kk | Organic silver paste |
| CN1329926C (en) * | 2005-05-13 | 2007-08-01 | 范琳 | Electrode thick liquid without lead and silver and mfg. method thereof |
| CN101964219A (en) * | 2010-08-10 | 2011-02-02 | 上海九晶电子材料股份有限公司 | Silver paste for positive of crystalline silicon solar cell and preparation method thereof |
| CN102001833A (en) * | 2010-12-20 | 2011-04-06 | 昆明理工大学 | Unleaded glass powder used for electronic paste and preparation method thereof |
-
2012
- 2012-07-11 CN CN2012102388987A patent/CN102831948A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05225822A (en) * | 1992-02-07 | 1993-09-03 | Tanaka Kikinzoku Kogyo Kk | Organic silver paste |
| CN1329926C (en) * | 2005-05-13 | 2007-08-01 | 范琳 | Electrode thick liquid without lead and silver and mfg. method thereof |
| CN101964219A (en) * | 2010-08-10 | 2011-02-02 | 上海九晶电子材料股份有限公司 | Silver paste for positive of crystalline silicon solar cell and preparation method thereof |
| CN102001833A (en) * | 2010-12-20 | 2011-04-06 | 昆明理工大学 | Unleaded glass powder used for electronic paste and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502926A (en) * | 2015-12-11 | 2016-04-20 | 贵州佰博新材料科技有限公司 | Semiconductor surface passivation lead-free glass powder and preparing method thereof |
| CN108083650A (en) * | 2017-12-26 | 2018-05-29 | 中建材蚌埠玻璃工业设计研究院有限公司 | Crystal silicon solar batteries front side silver paste glass dust and preparation method thereof |
| CN110033875A (en) * | 2019-05-16 | 2019-07-19 | 应炎冲 | A kind of preparation method of crystal silicon photovoltaic cell front electrode silver slurry |
| CN110033876A (en) * | 2019-05-16 | 2019-07-19 | 应炎冲 | A kind of crystal silicon photovoltaic cell aluminum slurry material and preparation method |
| CN114334216A (en) * | 2022-03-07 | 2022-04-12 | 西安宏星电子浆料科技股份有限公司 | Thick film conductor paste |
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Application publication date: 20121219 |