CN109761504A - A kind of PERC cell backside silver paste glass powder activation silver plating process - Google Patents
A kind of PERC cell backside silver paste glass powder activation silver plating process Download PDFInfo
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- CN109761504A CN109761504A CN201910041968.1A CN201910041968A CN109761504A CN 109761504 A CN109761504 A CN 109761504A CN 201910041968 A CN201910041968 A CN 201910041968A CN 109761504 A CN109761504 A CN 109761504A
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- glass powder
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Abstract
The invention discloses a kind of PERC cell backside silver paste glass powders to activate silver plating process, it includes the processing step of nano silver activation glass powder, glass powder chemical silvering；Present invention process process is simple, easily operated, harmful and valuable metal ion such as the stannous chloride used and palladium chloride is plated without using traditional chemical in preparation process, and chlorine and other impurities element will not be introduced, the ingredient of glass powder is not changed, the silver-colored@glass powder composite granule of preparation is used to improve the compactness extent of PERC cell backside electrode thick film, electrode resistance is reduced, the incident photon-to-electron conversion efficiency and electrode reliability of solar battery can be effectively improved.
Description
Technical field
The present invention relates to the modified techniques, in particular to glass of glass powder bonding phase in PERC cell backside electrocondution slurry
Powder activates silver plating process, belongs to solar cell preparation technology.
Background technique
With social industrial expansion, the energy consumed by the mankind is more and more.Among these, sun energy storage capacity is the richest
Richness, it is inexhaustible, it is the permanent energy and pollution-free, for development environment friendly, society plays great effect.Therefore,
The utilization of solar energy also becomes the emphasis of various countries' research.In recent years, crystal silicon solar energy battery generating efficiency improved year by year, this its
In, PERC battery obtains industry with its high-photoelectric transformation efficiency and widely pays close attention to.
PERC battery has one layer of AlOx passivating structure compared to the conventional crystalline silion cell back side, needs to be added laser in technique and opens
Slot technique realizes effective electrical contact of back aluminium and silicon substrate.Meanwhile in order to protect passivation layer, PERC battery is needed sintering temperature
30~50 DEG C are reduced, therefore, there is new requirement to back side silver paste.First, back electrode silver paste needs protection to be passivated during the sintering process
Layer is not destroyed；Second, for the stability for guaranteeing component for long periods work, back electrode need to have reliable welding performance.
PERC cell backside silver paste includes silver powder solid conduction phase, and glass powder is bonded phase, organic carrier and other additives.
Glass powder is as bonding phase, although proportion very little, only about accounts for 2~3wt%, its effect played is to Guan Chong
It wants.
102351427 A of Chinese patent CN reports the preparation process of the silver-colored packet glass powder of silver paste of solar cells, still
The patent still uses toxic SnCl2·H2O sensitization activation, introduces new impurity, affects paste composition, be unfavorable for industrializing
Production.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that it is living to provide a kind of PERC cell backside silver paste glass powder
Change silver plating process, the technological operation is simple, easy to implement and nontoxic low cost, improves electrode for PERC cell backside silver paste and burns
The compactness of knot improves solar cell photoelectric transformation efficiency.
To achieve the above object, the technical scheme is that the following steps are included:
(1) nano silver activates glass powder: by glass powder (BiO2-SiO2-MnO2- CuO system), silver nitrate be added to second two
In alcohol, preliminary reduction reaction occurs under ultrasound and mechanical stirring state, restores part nano silver and is attached to glass powder surface,
Glass powder is activated；
(2) glass powder chemical silvering: stopping ultrasound, then increases reaction temperature, reduction reaction rate is improved, in glass powder
Surface chemistry plates silver layer, obtains the suspension of silver-colored glass powder composite granule, and after standing sedimentation, decantation removes supernatant liquor,
It is respectively cleaned three times with deionized water and dehydrated alcohol respectively, drying obtains silver-colored glass powder composite granule in an oven.
Further setting is in the step (1), and reaction temperature is 25 DEG C -30 DEG C, and glass powder silver nitrate mass ratio is
100~5；And the corresponding addition 100ml ethylene glycol of every gram of silver nitrate, nano silver partial size is in 10nm~200nm.
It is 60 DEG C -85 DEG C that further setting, which is the reaction temperature in the step (2), and being stirred to react the time is 0.5h-
1.5h。
Further setting be in the silver-colored@glass powder composite granule silver content in 0.3wt%~5wt%.
It is 0.5 μm~5 μm that further setting, which is glass powder partial size,.
It is graininess that further setting, which is the silver coating on prepared silver-colored@glass powder composite granule surface, and partial size is less than
200nm。
Further setting be the following steps are included:
(1) nano silver activates glass powder
20g glass powder, ultrasonic disperse and mechanical stirring 5min are added into 20mL ethylene glycol, adds 0.2g silver nitrate,
Ultrasound stirs, and reacts 10min under the conditions of 25 DEG C, and solution colour variation can be observed；This step ultrasound provides ethylene glycol and nitric acid
The chemical driving force of silver reaction promotes forming core, activates glass powder；
(2) glass powder chemical silvering
Under first step reaction condition, ultrasound condition is removed, reaction environment temperature is increased to 75 DEG C, stirs 0.5h, obtains
The suspension of silver-colored glass powder composite granule, after standing sedimentation, decantation removes supernatant liquor, respectively with deionized water and anhydrous
Ethyl alcohol respectively cleans three times, and drying obtains silver-colored@glass powder composite granule in 60 DEG C of baking oven.
Innovation Mechanism of the invention is: one layer of nano silver particles is plated on glass powder, the high activity of one side nano silver can
To reduce the softening temperature of glass powder during the sintering process, improve the mobility of glass melt, electrode is promoted to form fine and close lead
Electric network reduces cell series resistance, improves battery fill factor；It on the other hand can be by controlling silver@glass powder composite powder
The content of nanometer silver of body, improves the mechanical strength of electrode and substrate contact, and then can obtain under the conditions of low-temperature sintering reliable
Physical contact.
The used ethylene glycol of the application is as weak reductant, ultrasonic agitation stage slow with silver nitrate reaction rate, initial
Mainly play a part of to activate glass powder surface.Ultrasonic wave promotes ethylene glycol and AgNO3Reaction, it is attached to generate small nano-Ag particles
On glass powder surface.Under the conditions of subsequent chemical plating, the mild reaction speed of ethylene glycol ensure that the uniform of nano-Ag particles
The integrality of property and plated film.
The invention has the advantages that
(1) technological operation is simple, and no replacement is required replaces plating solution, and activation, reaction use same reaction container；
(2) silver-colored glass powder composite granule of the invention is added in PERC back silver, and one layer of nanometer silver granuel is plated on glass powder
Son, the high activity of one side nano silver can reduce the softening temperature of glass powder during the sintering process, improve the stream of glass melt
Dynamic property, promotes electrode to form fine and close conductive network, reduces cell series resistance, improves battery fill factor；It on the other hand can
With by the content of nanometer silver of control silver@glass powder composite granule, the mechanical strength of improvement electrode and substrate contact, and then can be
Reliable contact is obtained under the conditions of low-temperature sintering.
(3) PERC low fever's temperature condition can be matched by controlling nano-Ag particles adhesion amount, and obtains reliable contact, mentioned
High electrode welds pulling force.Present invention process process is simple, easily operated, plates the chlorine used in preparation process without using traditional chemical
Change harmful and valuable metal ion such as stannous and palladium chloride, and chlorine and other impurities element will not be introduced, does not change glass powder
Ingredient, the silver-colored@glass powder composite granule of preparation is used to improve the compactness extent of PERC cell backside electrode thick film, reduces electrode
Resistance can effectively improve the incident photon-to-electron conversion efficiency and electrode reliability of solar battery.
In conclusion operation of the present invention is simple, easy to implement and nontoxic low cost, the silver-colored@glass powder composite granule of preparation
The compactness of electrodes conduct network can be improved for solar cell conductive paste and reduce silver-colored silicon contact resistance, improve solar energy
Cell photoelectric transformation efficiency.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without any creative labor, according to
These attached drawings obtain other attached drawings and still fall within scope of the invention.
Glass powder SEM before Fig. 1 is present invention process schemes.
Fig. 2 is the SEM figure of the silver-colored@glass powder composite granule of preparation.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
Embodiment 1:
Nano silver activates glass powder: weighing 5g glass powder and is dissolved in 20mL ethylene glycol solution, stirring, ultrasonic disperse add
0.2g AgNO3, 10min is stirred by ultrasonic at room temperature；
Glass powder chemical silvering: removal ultrasound condition, reaction environment temperature are increased to 75 DEG C, stir 0.5h, obtain silver-colored@glass
The suspension of glass powder composite granule, after standing sedimentation, decantation removes supernatant liquor, each with deionized water and dehydrated alcohol respectively
Three times, drying obtains silver-colored@glass powder composite granule in 60 DEG C of baking oven for cleaning.
By silver powder, silver@glass powder composite granule, organic carrier and dopant in the ratio of 64:2:33.5:0.5 (wt%)
Mixing, is ground to silver paste of the fineness less than 6 μm through three-roll grinder, is screen-printed on silicon wafer, dried, infrared sintering
After test its electrical property, be shown in Table 1, incident photon-to-electron conversion efficiency is higher by 0.06% than silver@glass powder composite granule (comparative example) is not used
(abs), averagely welding pulling force is more than 4N.
Embodiment 2:
Nano silver activates glass powder: weighing 10g glass powder and is dissolved in 20mL ethylene glycol, stirring, ultrasonic disperse add 0.2g
AgNO3, 10min is stirred by ultrasonic at room temperature；
Glass powder chemical silvering: removal ultrasound condition, reaction environment temperature are increased to 75 DEG C, stir 1.5h, obtain silver-colored@glass
The suspension of glass powder composite granule, after standing sedimentation, decantation removes supernatant liquor, each with deionized water and dehydrated alcohol respectively
Three times, drying obtains silver-colored@glass powder composite granule in 60 DEG C of baking oven for cleaning.
By silver powder, silver@glass powder composite granule, organic carrier and dopant in the ratio of 60:2:33.5:0.5 (wt%)
Mixing, is ground to silver paste of the fineness less than 6 μm through three-roll grinder, is screen-printed on silicon wafer, dried, infrared sintering
After test its electrical property, be shown in Table 2, incident photon-to-electron conversion efficiency is higher by 0.01% than silver@glass powder composite granule (comparative example) is not used
(abs), averagely welding pulling force is more than 4N.
Embodiment 3:
Nano silver activates glass powder: weighing 20g glass powder and is dissolved in 20mL ethylene glycol solution, stirring, ultrasonic disperse add
0.2g AgNO3, 10min is stirred by ultrasonic at room temperature；
Glass powder chemical silvering: removal ultrasound condition, reaction environment temperature are increased to 80 DEG C, stir 2h, obtain silver-colored@glass
The suspension of powder composite granule, after standing sedimentation, decantation removes supernatant liquor, each clear with deionized water and dehydrated alcohol respectively
It washes three times, drying obtains silver-colored@glass powder composite granule in 60 DEG C of baking oven.
By silver powder, silver@glass powder composite granule, organic carrier and dopant in the ratio of 60:2:33.5:0.5 (wt%)
Mixing, is ground to silver paste of the fineness less than 6 μm through three-roll grinder, is screen-printed on silicon wafer, dried, infrared sintering
After test its electrical property, be shown in Table 2, incident photon-to-electron conversion efficiency is higher by 0.03% than silver@glass powder composite granule (comparative example) is not used
(abs), averagely welding pulling force is more than 4N.
Table one
Table two
Table three
Table one, table two, table three illustrate: the FF and E of three embodiment batteriesffIt is all higher than comparative example, and RsIt is all relatively low.This
Illustrate that one layer of nano silver is coated on glass powder to be reduced Rs really and improve FF, and due to the activation of nano silver,
Silver electrode sintering is promoted, higher welding pulling force is obtained.Meanwhile under identical activation condition, extend electroless plating time, nanometer
Silver-colored activated sintering effect is obvious, and more reliable silver electrode contact also can be obtained under the conditions of composite granule low fever's temperature.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (7)
1. a kind of PERC cell backside silver paste activates silver plating process with glass powder, it is characterised in that the following steps are included:
(1) nano silver activates glass powder: by glass powder (BiO2-SiO2-MnO2- CuO system), silver nitrate be added in ethylene glycol,
Preliminary reduction reaction occurs under ultrasound and mechanical stirring state, restores part nano silver and is attached to glass powder surface, to glass
Glass powder is activated；
(2) glass powder chemical silvering: stopping ultrasound, then increases reaction temperature, reduction reaction rate is improved, on glass powder surface
Silver coating in chemical plating, obtains the suspension of silver-colored@glass powder composite granule, and after standing sedimentation, decantation removes supernatant liquor, point
It is not cleaned respectively three times with deionized water and dehydrated alcohol, drying obtains silver-colored glass powder composite granule in an oven.
2. a kind of PERC cell backside silver paste according to claim 1 activates silver plating process with glass powder, it is characterised in that:
In the step (1), reaction temperature is 25 DEG C -30 DEG C, and glass powder silver nitrate mass ratio is 100~5；And every gram of silver nitrate pair
100ml ethylene glycol should be added, nano silver partial size is in 10nm~200nm.
3. a kind of PERC cell backside silver paste according to claim 1 activates silver plating process with glass powder, it is characterised in that:
Reaction temperature in the step (2) is 60 DEG C -85 DEG C, and being stirred to react the time is 0.5h-1.5h.
4. a kind of PERC cell backside silver paste according to claim 1 activates silver plating process with glass powder, it is characterised in that:
Silver content is in 0.3wt%~5wt% in the silver-colored@glass powder composite granule.
5. a kind of PERC cell backside silver paste according to claim 1 activates silver plating process with glass powder, it is characterised in that:
Glass powder partial size is 0.5 μm~5 μm.
6. a kind of PERC cell backside silver paste according to claim 1 activates silver plating process with glass powder, it is characterised in that:
The silver coating on prepared silver-colored@glass powder composite granule surface is graininess, and partial size is less than 200nm.
7. PERC cell backside silver paste according to claim 1 activates silver plating process with glass powder, it is characterised in that including
Following steps:
(1) nano silver activates glass powder
20g glass powder, ultrasonic disperse and mechanical stirring 5min are added into 20mL ethylene glycol, adds 0.2g silver nitrate, ultrasound,
It stirs, reacts 10min under the conditions of 25 DEG C, solution colour variation can be observed；
(2) glass powder chemical silvering
Under first step reaction condition, ultrasound condition is removed, reaction environment temperature is increased to 75 DEG C, stirs 0.5h, obtains silver-colored@glass
The suspension of glass powder composite granule, after standing sedimentation, decantation removes supernatant liquor, each with deionized water and dehydrated alcohol respectively
Three times, drying obtains silver-colored@glass powder composite granule in 60 DEG C of baking oven for cleaning.
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| CN201910041968.1A CN109761504A (en) | 2019-01-17 | 2019-01-17 | A kind of PERC cell backside silver paste glass powder activation silver plating process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910041968.1A CN109761504A (en) | 2019-01-17 | 2019-01-17 | A kind of PERC cell backside silver paste glass powder activation silver plating process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048234A (en) * | 2019-12-27 | 2020-04-21 | 无锡帝科电子材料股份有限公司 | Efficient nano-silver coated glass powder and doped nano-oxide conductive paste and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001830A (en) * | 2009-08-31 | 2011-04-06 | 海洋王照明科技股份有限公司 | Cellular glass containing silver nano particles and preparation method thereof |
| CN103861657A (en) * | 2014-02-24 | 2014-06-18 | 浙江大学 | Preparation method of nano-silver loaded porous silicon dioxide |
| CN107316669A (en) * | 2016-04-27 | 2017-11-03 | 上海纳晶科技有限公司 | Nano Silver wraps up one-dimensional linear electrode material and preparation method thereof |
| CN107324664A (en) * | 2017-06-16 | 2017-11-07 | 北京市合众创能光电技术有限公司 | A kind of method of modifying of solar cell conductive silver paste glass dust |
-
2019
- 2019-01-17 CN CN201910041968.1A patent/CN109761504A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001830A (en) * | 2009-08-31 | 2011-04-06 | 海洋王照明科技股份有限公司 | Cellular glass containing silver nano particles and preparation method thereof |
| CN103861657A (en) * | 2014-02-24 | 2014-06-18 | 浙江大学 | Preparation method of nano-silver loaded porous silicon dioxide |
| CN107316669A (en) * | 2016-04-27 | 2017-11-03 | 上海纳晶科技有限公司 | Nano Silver wraps up one-dimensional linear electrode material and preparation method thereof |
| CN107324664A (en) * | 2017-06-16 | 2017-11-07 | 北京市合众创能光电技术有限公司 | A kind of method of modifying of solar cell conductive silver paste glass dust |
Non-Patent Citations (1)
| Title |
|---|
| 徐惠等: "乙二醇水热还原法制备纳米银", 《贵金属》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048234A (en) * | 2019-12-27 | 2020-04-21 | 无锡帝科电子材料股份有限公司 | Efficient nano-silver coated glass powder and doped nano-oxide conductive paste and preparation method thereof |
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