Heraeus products

Heraeus continues to reduce the silver content per cell with the introduction of SOL205S, a modification to our SOL205, with a reduced silver content. SOL205S is a back-side tabbing Ag conductor paste for mono and multicrystalline silicon solar cells. SOL205S requires less paste per cell than previous generations and maintains the advantage of printability ease and excellent cell adhesion. SOL205S is a Pb and Cd free material that has excellent solderability in both lead and lead-free solders.

SOL230H is a lead and cadmium free back-side tabbing silver conductor for mono and multicrystalline solar cell wafers. SOL230H is a robust paste that can be processed on textured or untextured wafers and allows the use of leaded or lead-free solder ribbons. Benchmark testing against a commonly used tabbing silver paste showed several advantages for SOL230H using a variety of conditions. The benefits included greatly improved adhesion and a significant reduction in paste consumption. This series of paste is also available in other versions based on customer’s process requirements.