Basic Info.
Conversion Efficiency(Polycrystal)
Above 18.30%
Conversion Efficiency(Monocrystal)
Above 19.4%
Viscosity
40-120PA.S(Ndj-8s,25centigrade, #4 Rotor)
BOPP Stainless Steel
250-325 Mesh
Peak Temperature
780-830 Centigrade
Unit Consumption(156*156)
1.24-1.4G/Piece
Advantage 1
High Efficiency
Advantage 2
High Boiling Resistant
Product Description
Silicon Solar Cell Aluminium Paste
LD7881G
Technical specification
LD7881G is an environmental electronic aluminium paste developed to provide back contact metallization for solar cell, to mach with the TEC of silicon substrate well, it has the features of good printing resolution,fine and smooth surface,high adhesion,low bowing and excellent conversion efficiency. All the material content comply with regulatory requirements of harmful elements control among Chinese and European customers'country or region., including RoHS compliant and REACH regulations.
Main technical indicators and performance
1.Printing: Recommend 250~325mesh BOPP stainless steel screen. Recommend viscosity: 55-75 Pa·S when using 280mesh,50-70 Pa·S when using 300mesh. Stirring for 30min near the bottom of the vertical mixer, or 6h in roll mixer before use.
2.Control the printing wet weight: 0.75-0.90gon125 single silicon, 1.20-1.50g on 156 polysilicon.
3. According to the wet weight above-mentioned: Dried thickness: 30-35μm. Fired thickness is 25-30μm
4.Drying temperature(°C): Infrared stove,about 3min,220-250°C. Quick stove, about 24-30s, 280-310°C.
5.Recommend Firing temperature(Despatch sintering furnace,the actual temperature of silicon substrate surface):780-810°C
6.Conversion Efficiency:125 single crystal silicon,average conversion efficiency≥18.50%,156 single crystal silicon,average conversion efficiency≥18.20%,156 polysilicon, average conversion efficiency≥17.00%.
7.Alcohol wipe test:Cotton ball moistened with alcohol and wipe the aluminum back surface field, no black powder.
8.Warpage:125 single silicon≤1.5mm, 156 single/polysilicon≤2.0mm
9.Resistant to boiling:Immersed cells in 70°C deionized water by 10min,take out and observe Aluminium back surface field.There are non-white, blistering, shedding and other undesirable phenomena, as well as no powder out or nigrescence wiped by alcohol.
10.Adhesion:Laminating fired cells,gash a 1cm wide EVA strip. Tensile testing is more than 10N and no shedding on Aluminium back surface.
11.Damp heat test: Kept in an environment at a temperature of 85 °C, humidity of 85% for 48 hours, and at room temperature after 4 hours, than observe the Aluminium back surface. There are non-white, blistering, shedding and other undesirable phenomena.
12.Thermal cycling test: Kept the cells in an environment at a temperature of -40 °C, humidity of 60% for 10 min,then heated to 85°C through 5 hours and retained for 10 minutes, temperature change rate between highest and lowest is no more than 100°C/h. This is a cycle. There is no shedding or serious cosmetic defects after 5 cycles.
13.Reliability: After composed to modules, test it according to "Crystalline silicon terrestrial photovoltaic modules IEC61215", "PV module safety certification IEC61730", "flat photovoltaic panels UL1703". In the standard test conditions, the maximum output power attenuation meet the standard requirements, no serious cosmetic defects.
14.Thinner: The viscosity is adjusted to good printability when produced. It is not recommended to add the thinner.so you must be very cautious to add it, then stir it uniformly.
15.Compatibility: Before the mass production,you must test the compatibility between Aluminium paste and wafer, Ag paste and Aluminium paste.
16.Packing:2kg/plastic can, 6 plastic cans(12kg)/carton, 84 cartons(1000kg)/pallet
17). Transport and storage:
During transportation and storage should protect against the tide and contamination. Containers may be stored in a clean, dry and stable environment at room temperature (25(±5)°C), humidity ≤ 60% RH, with their lids tightly sealed to avoid direct sunlight.Avoid acid corrosion atmosphere, oil, dust particles atmosphere. The aluminium paste's shelf life is six months.
Address:
No. 88 Jinlong Rd, Xinma Industrial Zone, Zhuzhou, Hunan, China
Business Type:
Manufacturer/Factory
Business Range:
Chemicals, Electrical & Electronics
Management System Certification:
ISO 14001, ISO 9001
Company Introduction:
Hunan LEED Electronic Ink Paste Co., Ltd. Specialized in electronic paste developing and production for more than ten years. We are Longer than the R & D, diligent service, pursuit of excellence. All products are to follow environmental protection, energy saving ideas. All product have the same testing conditions and experimentation with our customer′s using conditions in order to have the real feeling of our customers. We do hope to provided a new choices for your higher requirement through our product and service. At the same time, it will also reflect our company′s own social value.
Adopt independent R&D and cooperated with University, our company undertake the "national 863 project" and National SME Innovation Fund project. Formed several series of electronic paste with Completely independent intellectual property rights.