CN103337277A - Conductive silver paste for front electrode of solar battery and preparation method of conductive silver paste - Google Patents
Conductive silver paste for front electrode of solar battery and preparation method of conductive silver paste Download PDFInfo
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- CN103337277A CN103337277A CN2013102915104A CN201310291510A CN103337277A CN 103337277 A CN103337277 A CN 103337277A CN 2013102915104 A CN2013102915104 A CN 2013102915104A CN 201310291510 A CN201310291510 A CN 201310291510A CN 103337277 A CN103337277 A CN 103337277A
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- solar battery
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Abstract
The invention discloses conductive silver paste for a front electrode of a solar battery. The conductive silver paste comprises the following ingredients by weight percentage: 70-90% of silver powder, 2-10% of glass powder and 5-20% of organic carrier. The invention further discloses a preparation method of the conductive silver paste for the front electrode of the solar battery. The conductive silver paste for the front electrode of the solar battery has good thixotropy; after silk-screen printing, the obtained front electrode of the solar battery is small in width and great in height, that is, an aspect ratio of an electrode grid line is high, so that the front lightproof area of the solar battery is small; and the solar battery has good performance.
Description
Technical field
The present invention relates to a kind of electrode of solar battery material, be specifically related to a kind of front electrode of solar battery conductive silver paste, the invention still further relates to the preparation method of described conductive silver paste.
Background technology
Solar energy has been applied in fields such as generating, hot water, drying, refrigeration, heating as a kind of clean energy resource, wherein solar cell development the earliest, most widely used.Solar cell can be divided into according to the semi-conducting material difference: silica-based solar cell, thin-film solar cells and organic solar batteries etc., and silica-based solar cell is the leading products in the existing market.
Silica-based solar cell is to be made of P type silicon chip, n type layer, antireflective coating, positive silver electrode, aluminium back of the body field plate and these several parts of back silver electrode, and wherein positive silver electrode forms by silk screen printing the silver slurry on antireflective coating.
The silver slurry is made up of silver powder, glass dust and organic carrier.Silver powder in silver slurry as conductive phase; Glass dust melts in the process of high temperature sintering, and bonding between silver powder and the silicon chip is got up, and forms ohmic contact; Organic carrier mainly is to play a part to disperse and wetting powder granule in the silver slurry, makes the silver slurry have good silk screen printing.
The silver slurry is being carried out in the process of silk screen printing, scraper applies power to the silver slurry, this moment, the viscosity of silver slurry constantly reduced along with the increase of shear rate, the mesh that makes silver-colored slurry can see through silk screen smoothly deposits on the silicon chip, after the scraper effect, and the silk screen resilience, the viscosity that has been printed on the silver slurry on the silicon chip is got back to the preceding viscosity of the application of force immediately, and not on silicon chip drawout come, thereby obtain front electrode of solar battery pattern clearly, this just requires the silver slurry to have good thixotropy.
The thixotropy of silver slurry depends primarily on the composition of organic carrier.Its component of organic carrier of using mainly comprises solvent at present, thickener and surfactant, the silver slurry thixotropy of this system is relatively poor, the silver slurry is through after the silk screen printing, deposit to and continue on the silicon chip to flow, make the front electrode of solar battery aspect ratio for preparing less, namely the big height of electrode width is little, cause solar battery front side shading area big, influenced solar cell properties.
Summary of the invention
One of purpose of the present invention is to provide a kind of front electrode of solar battery conductive silver paste, has thixotropy preferably, uses it to come printing solar cell front electrode aspect ratio height, and has good electrical properties.
The present invention is achieved in that
A kind of front electrode of solar battery conductive silver paste, its percentage by weight component is: silver powder 70-90%, glass dust 2-10%, organic carrier 5-20%.
Described silver powder is ball shape silver powder, and its particle diameter is 0.5-5 μ m;
Described glass dust is lead-boron glass system;
Described organic carrier is made up of solvent, thickener, plasticizer and thixotropic agent, described solvent is a kind of or its combination in terpinol, butyl carbitol acetate, the butyl carbitol, described thickener is ethyl cellulose, described plasticizer is phthalate, and described thixotropic agent is a kind of or its combination of rilanit special, oxidic polyethylene, polyamide wax, low molecular polyamides, gas-phase silica, aerosil.
It is as follows with the preparation method of conductive silver paste to the invention also discloses described front electrode of solar battery:
(1) preparation of organic carrier:
With a kind of or its combination and 7%-15% phthalic ester plasticizer in 8%-12% ethyl cellulose and 72%-84% terpinol, butyl carbitol acetate, the butyl carbitol, adding the 0.2-1% thixotropic agent then mixes, fully stir in thermostat water bath and be made into organic carrier, the temperature of water-bath is 70-85 ℃.
(2) preparation of conductive silver paste:
With silver powder 70-90%, glass dust 2-10% and organic carrier 5-20% mix in container, and the grinding by three-roll grinder obtains the front electrode of solar battery conductive silver paste.
Front electrode of solar battery of the present invention has good thixotropy with conductive silver paste, after silk screen printing, the front electrode of solar battery width low height that obtains is big, i.e. gate electrode line aspect ratio height, make that solar battery front side shading area is little, have good performance.
Embodiment
Embodiment 1
Take by weighing silver powder 88g, glass dust 3g, (its component and percentage by weight are organic carrier: ethyl cellulose 8%, terpinol 52.6%, butyl carbitol acetate 27.2%, dibutyl phthalate 12%, polyamide wax 0.2%) 9g, mix the back and grind in the three-roll grinder enterprise, obtain conductive silver paste.Prepare front electrode of solar battery with this silver slurry by silk screen printing, its every performance is shown in subordinate list.
Embodiment 2 and comparative example 1
Conductive silver paste preparation technology and front electrode preparation technology are similar in appearance to embodiment 1 in embodiment 2 and comparative example 1, and except changing the content w of thixotropic agent polyamide wax, its composition and results of property are as shown in table 1.
Embodiment 3
Take by weighing silver powder 88g, glass dust 3g, (its component and percentage by weight are organic carrier: ethyl cellulose 8%, terpinol 52.6%, butyl carbitol acetate 27.2%, dibutyl phthalate 12%, aerosil 0.2%) 9g, mix the back and grind in the three-roll grinder enterprise, obtain conductive silver paste.Prepare front electrode of solar battery with this silver slurry by silk screen printing, its every performance is shown in subordinate list.
Embodiment 4-5 and comparative example 1
Conductive silver paste preparation technology and front electrode preparation technology are similar in appearance to embodiment 1 in embodiment 4-5 and comparative example 1, and except changing the content w of thixotropic agent aerosil, its composition and results of property are as shown in table 1.
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 1 |
| Silver powder/g | 88 | 88 | 88 | 88 | 88 | 88 |
| Glass dust/g | 3 | 3 | 3 | 3 | 3 | 3 |
| Organic carrier/g | 9 | 9 | 9 | 9 | 9 | 9 |
| Thixotropic agent content w | 0.2% | 0.5% | 0.2% | 0.5% | 0.8% | 0 |
| Electrode width | 0.86 | 0.91 | 0.93 | 0.82 | 0.93 | 1 |
| Electrode height | 1.06 | 0.99 | 0.98 | 0.91 | 1.02 | 1 |
| Aspect ratio | 1.23 | 1.09 | 1.06 | 1.12 | 1.10 | 1 |
| Resistivity | 0.96 | 0.99 | 1.00 | 1.02 | 1.06 | 1 |
※ annotates: electrode width, electrode height, aspect ratio and resistivity with comparative example 1 are 1, and other compare relative value with it.
Claims (5)
1. a front electrode of solar battery conductive silver paste is characterized in that: be made up of the component that percentage by weight is following: silver powder 70-90%, glass dust 2-10%, organic carrier 5-20%.
2. according to the described front electrode of solar battery conductive silver paste of claim 1, it is characterized in that described silver powder is ball shape silver powder, particle diameter is 0.5-5 μ m.
3. according to the described front electrode of solar battery conductive silver paste of claim 1, it is characterized in that described glass dust is lead-boron glass system glass.
4. according to the described front electrode of solar battery conductive silver paste of claim 1, it is characterized in that described organic carrier is by the solvent that calculates 72%-84% according to percentage by weight, the thickener of 8%-12%, the plasticizer of 7%-15% and the thixotropic agent of 0.2-1% are formed, described solvent is terpinol, the butyl carbitol acetate, a kind of or its combination in the butyl carbitol, described thickener is ethyl cellulose, described plasticizer is phthalic ester plasticizer, and described thixotropic agent is rilanit special, oxidic polyethylene, polyamide wax, low molecular polyamides, gas-phase silica, a kind of or its combination of aerosil.
5. the described front electrode of solar battery of the arbitrary claim of claim 1 to 4 is characterized in that with the preparation method of conductive silver paste:
(1) preparation of organic carrier:
A kind of or its combination and 7%-15% phthalic ester plasticizer in the 8%-12% ethyl cellulose that percentage by weight is calculated and 72%-84% terpinol, butyl carbitol acetate, the butyl carbitol, adding the 0.2-1% thixotropic agent then mixes, fully stir in thermostat water bath and be made into organic carrier, the temperature of water-bath is 70-85 ℃;
(2) preparation of conductive silver paste:
With silver powder 70-90%, glass dust 2-10% and organic carrier 5-20% mix in container, and the grinding by three-roll grinder obtains the front electrode of solar battery conductive silver paste.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102915104A CN103337277A (en) | 2013-07-11 | 2013-07-11 | Conductive silver paste for front electrode of solar battery and preparation method of conductive silver paste |
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| CN2013102915104A CN103337277A (en) | 2013-07-11 | 2013-07-11 | Conductive silver paste for front electrode of solar battery and preparation method of conductive silver paste |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854721A (en) * | 2014-03-25 | 2014-06-11 | 中希集团有限公司 | Metallized silver paste on front side of solar battery and preparation method of metalized silver paste |
| CN104008789A (en) * | 2013-10-28 | 2014-08-27 | 苏州晶银新材料股份有限公司 | Front conductive silver paste for crystal silicon solar cells |
| US20150364622A1 (en) * | 2013-03-27 | 2015-12-17 | Cheil Industries Inc. | Composition for forming solar cell electrode and electrode produced from same |
| CN106448801A (en) * | 2016-12-21 | 2017-02-22 | 北京市合众创能光电技术有限公司 | Front silver paste of crystalline silicon solar cell and preparation method thereof |
| CN106601328A (en) * | 2016-12-21 | 2017-04-26 | 北京市合众创能光电技术有限公司 | Positive silver paste of crystalline silicon solar cell laminated printing and preparation method thereof |
| CN108417291A (en) * | 2018-02-08 | 2018-08-17 | 浙江正泰太阳能科技有限公司 | Conductive silver paste for solar cell and preparation method thereof and solar cell |
| CN109411113A (en) * | 2017-08-18 | 2019-03-01 | 西安宏星电子浆料科技有限责任公司 | Groove Self-leveling conductor paste and its application method |
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| US5661041A (en) * | 1994-11-24 | 1997-08-26 | Murata Manufacturing Co., Ltd. | Conductive paste, solar cells with grid electrode made of the conductive paste, and fabrication method for silicon solar cells |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150364622A1 (en) * | 2013-03-27 | 2015-12-17 | Cheil Industries Inc. | Composition for forming solar cell electrode and electrode produced from same |
| US9899545B2 (en) * | 2013-03-27 | 2018-02-20 | Cheil Industries, Inc. | Composition for forming solar cell electrode and electrode produced from same |
| CN104008789A (en) * | 2013-10-28 | 2014-08-27 | 苏州晶银新材料股份有限公司 | Front conductive silver paste for crystal silicon solar cells |
| CN103854721A (en) * | 2014-03-25 | 2014-06-11 | 中希集团有限公司 | Metallized silver paste on front side of solar battery and preparation method of metalized silver paste |
| CN103854721B (en) * | 2014-03-25 | 2016-04-13 | 中希集团有限公司 | A kind of solar battery front side metallization silver slurry and preparation method thereof |
| CN106448801A (en) * | 2016-12-21 | 2017-02-22 | 北京市合众创能光电技术有限公司 | Front silver paste of crystalline silicon solar cell and preparation method thereof |
| CN106601328A (en) * | 2016-12-21 | 2017-04-26 | 北京市合众创能光电技术有限公司 | Positive silver paste of crystalline silicon solar cell laminated printing and preparation method thereof |
| CN106601328B (en) * | 2016-12-21 | 2018-03-13 | 北京市合众创能光电技术有限公司 | Positive silver paste of crystal silicon solar energy battery superimposition printing and preparation method thereof |
| CN109411113A (en) * | 2017-08-18 | 2019-03-01 | 西安宏星电子浆料科技有限责任公司 | Groove Self-leveling conductor paste and its application method |
| CN108417291A (en) * | 2018-02-08 | 2018-08-17 | 浙江正泰太阳能科技有限公司 | Conductive silver paste for solar cell and preparation method thereof and solar cell |
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Owner name: ZHONGWU FUNCTION MATERIAL INSTITUTE CO., LTD. Free format text: FORMER OWNER: INST. OF CHEMICAL MATERIAL, CHINESE INST. OF ENGINEERING PHYSICS Effective date: 20140811 Free format text: FORMER OWNER: SICHUAN RESEARCH CENTER OF NEW MATERIALS Effective date: 20140811 |
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Effective date of registration: 20140811 Address after: 518040, Shenzhen, Guangdong, Futian District, Che Kung Temple Tian An Digital City Futian Tian Tian hi tech building A block 402 room Applicant after: Zhongwu Function Material Institute Co., Ltd. Address before: Mianyang City, Sichuan Province, 621000 Mountain Road No. 64 Applicant before: Inst. of Chemical Material, Chinese Inst. of Engineering Physics Applicant before: Sichuan Research Center of New Materials |
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