New Product: 3rd gen front side silver paste from Heraeus offers higher efficiency

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Product Briefing Outline: The Photovoltaic Business Unit of  has introduced its 3rd generation front side silver paste (SOL 953) for lightly doped silicon solar cells. SOL953 and all of the Heraeus SOL Series of silver pastes are specially formulated to provide better yields and higher output for cell manufacturers. The specially designed front side pastes offer higher efficiency and the lead-free backside bus bar silver pastes correct adhesion and coverage.

Problem: Silver-thick-film contact paste is screen printed on the ARC and forms a contact with the emitter after reacting with the ARC during contact firing. Correct aspect ratio and fine line resolution are required for optimum cell efficiency.

Solution: The SOL953 paste is cadmium-free and specifically designed for high sheet resistance emitter applications, providing excellent aspect ratio and fine line resolution for advanced cell designs. SOL952 is a front side Ag conductor for single and multicrystalline silicon solar cell wafers. It easily penetrates the SiNX:H anti-reflective coating during the firing process and provides low contact resistance. SOL952 can be co-fired with commercially available backside Al and Ag/Al pastes.

Applications: Front side Ag conductor for single and multicrystalline silicon solar cell wafers.

Platform: SOL953 paste is typically dried in an IR dryer with set points of 250-300°C in less than 20 seconds or 150°C for 10 minutes in circulated air oven. Fired in a IR Furnace with Actual Wafer Peak Temperature at 740 -800°C. Material guaranteed to meet specifications for 6 months from date of shipment.

Availability: Currently available.

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