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Aluminum Paste Lead Free For Solar Cells
Aluminum Paste Lead Free For Solar Cells

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AL8866 is a series of aluminum pastes developed for use as the back electrode on single or polycrystalline silicon solar cells.

 

Technical Data Sheet

Product description

AL8866 is a series of aluminum pastes developed for use as the back electrode on single or polycrystalline silicon solar cells. This low bow aluminum paste is specially designed to form p+ doped layer when fired on a p-doped silicon (<200 microns) photovoltaic devices. This paste has been optimized to eliminate Al bead formation during the firing process.

Typical properties

Solids (%)

≥ 75%

Viscosity (Pa.s) (NDJ-79, 25)

23-35

Emulsion thickness

≤ 25μm

Screen mesh

200-280

Dried thickness

35±5μm

Fired thickness

25±5μm

Resistivity (milliohms/square)

≤ 30

Bowing

125×125mm Monocrystalline silicon≤ 1mm (200 micron wafer)

125×125mm Monocrystalline silicon 1±0.25mm (180 micron wafer)

All properties are target values and are not meant to represent product specifications.

 

DISCLAIMER: The product information and recommendations contained herein are based on data obtained by test

we believe to be accurate, but the accuracy and completeness thereof is not guaranteed. No warranty is expressed or

implied regarding the accuracy of these data, the results obtained from the use hereof, or that any such use will not

infringe any patent. QuanPhoton assumes no liability for any injury, loss, or damage, direct or consequential arising

out of its use by others. This information is furnished upon the condition that the person receiving it shall make their

own test to determine the suitability thereof for their particular use, before using it. User assumes all risk and liability

whatsoever in connection with their intended use. QuanPhotons only obligation shall be to replace such quantity of the  product proved defective.

                                                                                                   

Processing Recommendations

Paste preparation: Mix thoroughly before use (30-60min/kg). It is recommended that the paste temperature

be between 20-25 prior to printing.

Printing: 200-280 mesh screen with a ≤25μm emulsion thickness is recommended.

Drying: The paste can be typically dried in an infrared or conventional dryer with set points of 200 for 10-15 min.

Firing: Optimum firing conditions will need to be established by the customer depending on exact type of furnace used, wafer characteristics, processing, etc. For a typical infrared furnace, it should be pre-heated at 200-300 and the peak temperature should be 760-930.

Typical firing profile:

Thinning: The paste is supplied at the viscosity provided by the customer, therefore, thinning is not commended. Contact our sales representative for appropriate solvent details.

Storage: The paste should be stored in a cool and dry place away from direct sunlight at room temperature (5-30)with tightly capped containers.

Shelf life: AL8866 has a shelf life of 6months for the unopened containers when stored under the recommended conditions.

 

Safety and handling: This paste is intended for industrial use by trained personnel. These products contain

organic and inorganic ingredients. Avoid  prolonged contact with skin or inhalation of any vapors emitted

during use or heating of these compositions. The use of safety goggles, gloves and hand protection creams is recommended. Wash hands or skin thoroughly with soap and water after using these products. Do not eat or smoke in area where the products are used. Read the MSDS and product labels before using the products.

 

 

DISCLAIMER: The product information and recommendations contained herein are based on data obtained by test

we believe to be accurate, but the accuracy and completeness thereof is not guaranteed. No warranty is expressed or

implied regarding the accuracy of these data, the results obtained from the use hereof, or that any such use will not

infringe any patent. QuanPhoton assumes no liability for any injury, loss, or damage, direct or consequential arising

out of its use by others. This information is furnished upon the condition that the person receiving it shall make their

own test to determine the suitability thereof for their particular use, before using it. User assumes all risk and liability

whatsoever in connection with their intended use. QuanPhotons only obligation shall be to replace such quantity of the

product proved defective.

 

 

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