CN103745764B - A kind ofly adhere to good back silver with silicon solar cell back surface field aluminium paste and starch and preparation method thereof - Google Patents
A kind ofly adhere to good back silver with silicon solar cell back surface field aluminium paste and starch and preparation method thereof Download PDFInfo
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- CN103745764B CN103745764B CN201310706342.0A CN201310706342A CN103745764B CN 103745764 B CN103745764 B CN 103745764B CN 201310706342 A CN201310706342 A CN 201310706342A CN 103745764 B CN103745764 B CN 103745764B
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- 229910052709 silver Inorganic materials 0.000 title claims abstract description 47
- 239000004332 silver Substances 0.000 title claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 43
- 239000004411 aluminium Substances 0.000 title claims abstract description 41
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 27
- 239000010703 silicon Substances 0.000 title claims abstract description 27
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229920002472 Starch Polymers 0.000 title claims abstract description 14
- 235000019698 starch Nutrition 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000008107 starch Substances 0.000 title claims abstract description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000002002 slurry Substances 0.000 claims abstract description 30
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 14
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 14
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003085 diluting agent Substances 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 10
- 239000001856 Ethyl cellulose Substances 0.000 claims abstract description 9
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims abstract description 9
- 229920001249 ethyl cellulose Polymers 0.000 claims abstract description 9
- 235000019325 ethyl cellulose Nutrition 0.000 claims abstract description 9
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical group CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 claims abstract description 7
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract 1
- 238000007639 printing Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Abstract
The present invention relates to and a kind ofly adhere to good back silver with silicon solar cell back face aluminium paste and starch and preparation method thereof.What back silver was starched consists of silver powder 45wt% ~ 60wt%, glass dust 3wt% ~ 5wt%, organic carrier 30wt% ~ 50wt% and diluent 0.1wt% ~ 2wt%; Wherein organic carrier consist of ethyl cellulose 6wt% ~ 15wt%, rosin 3wt% ~ 20wt% and butyl 70wt% ~ 90wt%; Diluent is terpinol or butyl carbitol.Silver powder, glass dust, organic carrier and mixing diluents is even, and control viscosity is 50000 ~ 100000cps; And through grinding, control fineness < 15 μm.Back silver slurry of the present invention is for the preparation of silicon solar cell, and through high temperature Fast Sintering, respond well, silver-colored aluminium interracial contact is good, and battery efficiency is high, back silver electrode welding excellent performance.
Description
Technical field
The invention belongs to the preparation field of silicon solar cell slurry, particularly relate to and a kind ofly adhere to good back silver with silicon solar cell back face aluminium paste and starch and preparation method thereof.
Technical background
Silicon solar cell back face silver slurry is one of important raw and processed materials of silicon solar cell, is the key factor affecting solar cell properties.Back silver slurry is primarily of function items (silver powder), organic carrier, glassy phase three parts composition.
Growing along with green energy resource, photovoltaic industry is advanced by leaps and bounds, and the development of solar cell industry welcomes unprecedented prospect, also has higher requirement to solar cell size simultaneously.
Silk screen printing plays an important role in traditional silicon solar cell, and the printing of the back silver of silicon solar cell slurry and back side aluminium paste is the important operations of twice.First silicon solar cell being carried out to the printing of back side ag paste electrode, for increasing the contact of Yin Jiangyuhou road aluminium paste, reducing series resistance, the thin grid design in existing ag paste electrode many employings compartment edge, the back side.After being completed for printing, back silver slurry is dried, carry out the printing of second back side aluminium paste again, on this basis, the thin gate part of the meeting of back side aluminium paste and back silver slurry is overlapping to some extent, and namely part aluminium paste is directly printed on the thin grid in edge of the back silver slurry through drying.After experiencing first drying process again, carry out the printing of front side silver paste, last silicon cell will experience the sintering process of 800 ~ 900 DEG C.
After sintering terminates, the aluminium paste at the silicon solar cell back side and the contact position of back side ag paste electrode often can occur because aluminium paste is bad and produce contact point aluminium paste and swell and ftracture, the phenomenon of even peeling off with the wetting contact starched of silver.This directly will affect the series resistance of cell piece, thus affects the efficiency of cell piece.In addition, may occur time serious peeling off the front that aluminum particle sticks to adjacent cell sheet, thus affect the life-span of whole cell piece assembly, cause great economic loss.
For above-mentioned problem, in silver slurry, now the method for adding chemical assistant that adopts carries out modification to back silver slurry electrode surface more, increases the wettability of aluminium paste overleaf on ag paste electrode.But while change silver slurry contacts with aluminium paste, back silver slurry is affected too with the contact of cell piece silicon face, in addition, part of auxiliary remains in electrode surface, also can have an impact for the components welding after cell piece, cause the welding performance of back electrode and adhesion performance to decline directly or indirectly.
In sum, there is back silver slurry and the contact of back field aluminum paste and adhere to and badly cause aluminium powder peeling conditions, add related auxiliaries simultaneously and easily bring again welding performance change, rosin joint or weld.This product is developed to solve this technical barrier.
Summary of the invention
The object of the invention is the contact effect of starch electrode main grid in order to strengthen back side aluminium paste (be used in traditional silicon cell piece formed aluminium back surface field) and back silver, thus strengthen carrying on the back aluminium paste and back silver and starch stability between main grid and persistence.This is even more important, because the wetability of aluminium paste is generally poor under this structure for the back electrode with the thin grid feeler design in edge.Good contact between back silver slurry and back side aluminium paste is conducive to ensureing low series resistance, and it is aging along with the prolongation of its life cycle to delay silion cell assembly to the full extent.
The technical scheme that technical solution problem of the present invention is taked is:
First aspect, a kind ofly adhere to good back silver with silicon solar cell back surface field aluminium paste and starch, it is made up of silver powder, glass dust, organic carrier and diluent, is respectively in the content of percent mass: silver powder is 45wt% ~ 60wt%, glass dust is 3wt% ~ 5wt%, organic carrier is 30wt% ~ 50wt% and diluent is 0.1wt% ~ 2wt%; Described organic carrier is made up of ethyl cellulose, rosin and butyl, is respectively in the content of percent mass: ethyl cellulose is 6wt% ~ 15wt%, rosin is 3wt% ~ 20wt% and butyl is 70wt% ~ 90wt%.
Preferably, described diluent is terpinol or butyl carbitol.
Preferably, the viscosity of this silicon solar cell back face silver slurry is 50000 ~ 100000cps, fineness < 15 μm.
Second aspect, a kind of preparation method adhering to good back silver with silicon solar cell back surface field aluminium paste and starch, it comprises the following steps:
(1) organic carrier preparation: get ethyl cellulose 6wt% ~ 15wt%, rosin 3wt% ~ 20wt% and butyl 70wt% ~ 90wt%, dissolving mixes; Control viscosity is 20000 ~ 40000cps;
(2) mix: get silver powder 45wt% ~ 60wt%, glass dust 3wt% ~ 5wt%, organic carrier 30wt% ~ 50wt% and diluent 0.1wt% ~ 2wt%, mix; Control viscosity is 50000 ~ 100000cps;
(3) grind: adopt three-roller grinding, control fineness < 15 μm.
Preferably, described diluent is terpinol or butyl carbitol.
The present invention has machine aided to weld chemical assistant rosin by using one, and the surface infiltration of rosin to silver slurry and aluminium paste is respond well, and few in surface residual amount, does not affect welding performance, is that a kind of desirable back silver slurry adds organic additive.Be blended in organic carrier, then be fused in back silver slurry, under the prerequisite of not sacrificing pulling force, strengthen aluminium paste in printing, dry and wetability in sintering process overleaf on ag paste electrode, guarantee that the contact at both interfaces is good.
Aluminium paste can pass through adhesive tape test (such as using 3M adhesive tape) with the back of the body silver contact effect of starching and judge, and characterizes with the stripping test case that the thin grid of the back electrode of silicon solar cell and aluminium back surface field contact interface carry out adhesive tape.Experimental result shows, rosin can be strengthened aluminium paste and starch with silver the stability contacted, make silver slurry main grid and aluminium paste contact dry and high temperature sintering time more stable, and silicon solar battery assembly reliability is higher, can low series resistance and good transformation efficiency be kept, delay the aging of battery component.
, there is not aluminium powder and peel off, and do not occur containing the back silver slurry of rosin the phenomenon that aluminium powder peels off in back silver slurry of the present invention and aluminium paste co-sintering.By back silver slurry of the present invention for the preparation of silicon solar cell, through high temperature Fast Sintering, respond well, silver-colored aluminium interracial contact is good, and battery efficiency is high, back silver electrode welding excellent performance.
Embodiment
A kind ofly adhere to good back silver with silicon solar cell back surface field aluminium paste and starch, mixed by silver powder 60g, glass dust 5g, organic carrier 34g and terpinol 1g; Wherein organic carrier is mixed by ethyl cellulose 12g, rosin 8g and butyl 80g.Silver slurry viscosity is 50000 ~ 100000cps, fineness < 15 μm.
The preparation method of above-mentioned back silver slurry is as follows:
(1) ethyl cellulose 12g, rosin 8g and butyl 80g, dissolving mixes, obtained organic carrier; Actual measurement organic carrier viscosity is 31360cps(BookfieldDV II, RV5,10rpm, 25 DEG C);
(2) silver powder 60g, glass dust 5g, the step (1) organic carrier 34g of gained and terpinol 1g, mixes; Actual measurement slurry viscosity is 78230cps(BookfieldDV III, SC4-14,10rpm, 25 DEG C);
(3) grind: adopt three-roller grinding, actual measurement slurry fineness 7 μm.
By above-mentioned obtained back silver slurry and the Ru Xing back side, Guangzhou aluminium paste with the use of, after silk screen printing, drying sintering, aluminium paste and back silver starch electrode contact well, protuberance does not occur and peels off; Use the contact point of 3M adhesive tape to back side ag paste electrode and aluminium paste to carry out attachment test, substantially do not have aluminium powder to come off.
The tin-coated copper strip welding rod using Jiangyin hundred million glad and the scaling powder of Korean and Japanese ANX3133, the welding performance of test back silver slurry, solderability and soldering resistance are all good, and have larger peeling force.
Claims (5)
1. one kind is adhered to good back silver with silicon solar cell back surface field aluminium paste and starches, it is characterized in that, be made up of silver powder, glass dust, organic carrier and diluent, be respectively in the content of percent mass: silver powder be > 50wt% and≤60wt%, glass dust be 3wt% ~ 5wt%, organic carrier is > 30wt% and≤50wt% and diluent are 0.1wt% ~ 2wt%; Described organic carrier is made up of ethyl cellulose, rosin and butyl, is respectively in the content of percent mass: ethyl cellulose is 6wt% ~ 15wt%, rosin is 3wt% ~ 20wt% and butyl is 70wt% ~ 90wt%.
2. according to claim 1ly a kind ofly adhere to good back silver with silicon solar cell back surface field aluminium paste and starch, it is characterized in that, described diluent is terpinol or butyl carbitol.
3. according to claim 1ly a kind ofly adhere to good back silver with silicon solar cell back surface field aluminium paste and starch, it is characterized in that, viscosity is > 50000cps and≤100000cps, fineness < 15 μm.
4. a preparation method for silicon solar cell back face as claimed in claim 1 silver slurry, is characterized in that, comprise the following steps:
(1) organic carrier preparation: get ethyl cellulose 6wt% ~ 15wt%, rosin 3wt% ~ 20wt% and butyl 70wt% ~ 90wt%, mix; Control viscosity is 20000 ~ 40000cps;
(2) mix: get silver powder > 50wt% and≤60wt%, glass dust 3wt% ~ 5wt%, organic carrier > 30wt% and≤50wt% and diluent 0.1wt% ~ 2wt%, mix; Control viscosity and be > 50000cps and≤100000cps;
(3) grind: adopt three-roller grinding, control fineness < 15 μm.
5. the preparation method of silicon solar cell back face as claimed in claim 4 silver slurry, it is characterized in that, described diluent is terpinol or butyl carbitol.
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| CN201310706342.0A CN103745764B (en) | 2013-12-19 | 2013-12-19 | A kind ofly adhere to good back silver with silicon solar cell back surface field aluminium paste and starch and preparation method thereof |
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| CN201310706342.0A CN103745764B (en) | 2013-12-19 | 2013-12-19 | A kind ofly adhere to good back silver with silicon solar cell back surface field aluminium paste and starch and preparation method thereof |
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| CN103745764A CN103745764A (en) | 2014-04-23 |
| CN103745764B true CN103745764B (en) | 2016-03-23 |
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| CN107611224A (en) * | 2017-09-27 | 2018-01-19 | 常州大学 | A kind of method of lifting PERC solar cell aluminium paste performances |
| CN110120274B (en) * | 2019-06-05 | 2021-07-09 | 苏州晶银新材料股份有限公司 | Back electrode slurry of all-aluminum back surface field and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102760512A (en) * | 2012-05-28 | 2012-10-31 | 杭州正银电子材料有限公司 | Lead-free silver electroconductive slurry used for forming crystalline silicon solar cell front surface electrode, and preparation method thereof |
| CN103177794A (en) * | 2011-12-26 | 2013-06-26 | 浙江昱辉阳光能源有限公司 | Solar battery back silver slurry and preparing method thereof |
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| JP2000312014A (en) * | 1999-04-27 | 2000-11-07 | Sharp Corp | Thin-film photoelectric conversion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103177794A (en) * | 2011-12-26 | 2013-06-26 | 浙江昱辉阳光能源有限公司 | Solar battery back silver slurry and preparing method thereof |
| CN102760512A (en) * | 2012-05-28 | 2012-10-31 | 杭州正银电子材料有限公司 | Lead-free silver electroconductive slurry used for forming crystalline silicon solar cell front surface electrode, and preparation method thereof |
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Denomination of invention: Back surface silver slurry with great adhesion with silicon solar battery back field aluminum slurry and preparation method of back surface silver slurry Effective date of registration: 20180801 Granted publication date: 20160323 Pledgee: Bank of Jiaxing science and technology branch of Limited by Share Ltd. Pledgor: ZHEJIANG KAIYING NEW MATERIALS CO.,LTD. Registration number: 2018330000212 |
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Granted publication date: 20160323 Pledgee: Bank of Jiaxing science and technology branch of Limited by Share Ltd. Pledgor: ZHEJIANG KAIYING NEW MATERIALS CO.,LTD. Registration number: 2018330000212 |
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Denomination of invention: A back silver paste with good adhesion to the back field aluminum paste of silicon solar cells and its preparation method Granted publication date: 20160323 Pledgee: Haining Zhejiang rural commercial bank, Limited by Share Ltd. Pledgor: ZHEJIANG KAIYING NEW MATERIALS CO.,LTD. Registration number: Y2024980015266 |
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